Jet Wake Turbulence: Distance Ain’t Enough.

Sneaking up behind me, are you? Here’s an infrared view you might need to heed: not the hotspots, but powerful the twin horizontal corkscrews of air current swirling off the wingtips of my jet. They’re wily, dangerous, and not to be trusted.

According to the Flight Safety Foundation, the vortices from a jet can have an internal rotation of up to 300 feet per second and often extend between 2 and 10 nautical miles behind a jet aircraft. The twin tornadoes–that’s literally what they are, horizontal but spinning powerfully–sink at a variable rate, between 300 and 500 feet per minute to an altitude  between 500 and 900 feet below the aircraft’s flight path and can persist for three or more minutes depending on the meteorological conditions.

That’s the problem, but hardly the full situation. Add to this hazard the closely constrained flight path of jet traffic in terminal areas. For instance:

Approaching from the east, you’ll have a traffic stream from the west as well converging on the same runway complex. Not unusual as far as airports go–except that San Francisco International has less than the standard distance separating the two parallel runways. The FAA has waived the normal lateral separation, but you’d better keep that in mind nonetheless because that also means less than normal separation from the vortices of the aircraft next to you. Remember the outward spreading motion of those two tornadoes?

This guy could be your dance partner all the way down final–and if he’s next to you, you aren’t entitled to the separation you’d get if he were ahead of you. Mostly, ATC will “advise” you to “use caution” for the heavy on the west runway, workload and time permitting–but they don’t have to.

And time and workload may not permit any advanced warning, and adverse weather can shroud the entire scene anyway:

Look at the inset on the bottom right corner: Seattle (one of my favorite destination cities!) has three parallel runways grouped together, and you won’t be told which of the three runways you’re landing on until you turn base to final about three minutes from touchdown. Would it make sense or even be possible to keep you informed of the heavies on all three inbound tracks? Add to the mix the typically obscured Seattle visibility, plus the added workload of programming and validating the FMS  sytem approach waypoints at the last second demanded by the late runway assignment and is there a possibility of situational awareness overload, on final approach: was that a heavy in front of us? Or on the outboard runway?

Bring that back to San Francisco, where the standard runway separation is “waived,” like in MSP and many other cities. Now you’ve got a “buddy” laterally whose wake turbulence is drifting outwardly–just as yours is–and just because he’s not a “heavy” doesn’t mean he can’t roll you.

The ICAO worldwide “recommendation” for separation between a “heavy” and a “medium” following aircraft  (say, a 747 and a 737) is 5 NM (9.3 KM); between two heavies, 4 NM (7.4 KM). But the wild card not even mentioned in the separation rules is configuration and maneuvering: simply put, a “dirty” jet (flaps, gear) creates a nastier wake than a “clean” jet, and maneuvering distorts weight. That is, if I level off my 160,000 pound 737 with an addition one-half “G” force, I add to the effective weight another 40 tons of effect. And we’re a medium jet–imagine a heavy maneuvering dirty adding to his effective weight and wake.

That’s the science, now here comes the art. You know the reported winds at the field, but that’s a red herring: your encounter with wake turbulence won’t happen on the field. You need to be aware of the winds on approach, at your altitude. If the lateral wind at your altitude is blowing into the other jet’s wake, here’s what can happen: if the drift equals the outward spread momentum of the wake–and you have to figure the “dirty,” “maneuvering” wild cards mentioned above–the effect will either be to move the wake away more rapidly, or freeze it in place till it dissipates. Which is it?

You can’t see wake turbulence. You can’t be sure where it is, or know it’s strength based solely on the aircraft designation. And sooner or later, you’ll find yourself in it despite your best, most diligent precautions. What are you going to do, captain?

For a true jethead like me, the first answer is always speed–but not so fast (pun intended): you’re configured with restrictive maximum flap speeds. If you’re in a final configuration with 40 degrees of flaps, you’re limited to 162 knots max. But the second instinct is valid: power.

But power alone is only part of the answer: what you’re not doing is going down. Why not? Because we know the vorticies are sinking. If we remain level or climb, we’ll escape the effects. What are they?

The Flight Safety Foundation survey of hundreds of wake turbulence encounters reveals uncommanded roll in trailing aircraft of up to 45 degrees at altitudes below 1,000 above the ground. One thousand feet is another magic number at my airline: stabilized approach  (on speed, on altitude, power set) is mandatory from 1,000 feet to touchdown. On glidepath–not above or below; not accelerating or decelerating, power set to flown speed and stable. And certainly wings level.

Which brings up the next problem of two major headaches you’ll instantly own. First, the right amount of counter-aileron, even if applied prudently, in many jets will bring up the wing spoilers to drop the low wing rapidly, inducing adverse drag, requiring more power.

Second, the option of climbing or even flying level is constrained by the published missed approach: protected airspace may be below you if you are above the missed approach altitude. And laterally, not only is there often parallel traffic, there’s also dangerous terrain you must always monitor and stay clear of:

If you encounter wake effects in a level portion of the approach segment, prior to the aircraft ahead descending, at least you know his vortices will descend eventually below you and in this case, you normally feel the “burble” which now cues you: if the winds are keeping his wake aligned with your flight path, on glidepath you’re likely to fly into the tornadoes again when you’re slow and configured with speed-restricting flaps. Now look at the “mileage separation:” still think distance alone is enough? Still committing to the glidepath?

All of that doesn’t even consider the added, inevitable spoiler in every approach: weather. There’s more than terrain and aircraft for you to avoid in a very constrained airspace.

There’s really only one good answer: up. And “up” may be a s simple as “no more down,” meaning a stopped descent or a slight climb to exit the effects. In any case, if you’re below 1,000 feet you’re no longer “stable” per the mandatory requirements. If you’re above 1,000 feet, you’ve just been cued that the mileage interval, given the meteorological conditions, nonetheless has left you vulnerable to the adverse effects of wake turbulence–and you’re not going to proceed.

Which means, in the immortal words of my old friend the Chief Pilot at my airline addressing my 1991 class of Captain’s “Charm School” (officially, “Captain’s Duties & Responsibilities”) as we sat rapt: you’re going to “get the hell out of town.” Amen.

Back in the cabin? Expect the usual complaints about the delay for the second approach, plus a regular dose of exaggerated “there I was” tales about their wake turbulence encounter. So, don’t tell them–if you’ve done your avoidance and even escape properly, they’ll never know you even had a problem, which is the ultimate goal anyway: detecting and avoiding the problem in the first place.

The end result is, what they don’t know won’t hurt them, because you won’t let it. And that’s kind of why you get the privilege of flying the jet in the first place, isn’t it?

Winter Flying: Faith and Defiance.

I can’t decide if winter flying is is one long act of defiance, or shorter acts of combined faith. On a cold January day with an icy, raggedy ceiling and needle-like freezing rain rasping against the fuselage on taxi-out, on board it’s a steady 75 degrees. People aboard reflect the destination, not our departure point–and act of faith on their part requiring an act of defiance on mine.

It’s actually a worthy challenge, bringing all of the details to a successful conclusion: flight planning, routing, de-icing, preflight, taxi-out and pre-take-off de-icing. There’s a puzzle to assemble, jagged pieces of holdover times for de-icing fluid, precip rates and types–you know what’s reported, but you deal with what’s actually happening–and it’s up to you to account for the difference. Take-off performance degrades; weight limits based on the restrictions of leaving, but with due diligence to the weather conditions 1,200 miles south.

Boeing has given us a marvelous machine that will wake up encased in ice, but in a matter of minutes will operate from the ice box to the tropics. Not magic–just a lot of grunt work by a lot of people.

It’s a lot slower, but more than the temperature is involved: there are more requirements, plus people and machines work slower in the cold. As they should be expected to do, but which often results in frustration for those whose involvement is limited to riding the jet rather than trying to fly it safely. Sorry.

But eventually, we get to this:

Again, that’s going to be slow, too, by necessity. But be patient: the destination must be worth the trip, right? But inevitably, the factors a passenger plans to escape by air don’t make that escape easy.

Half the battle is getting into the air–where the other half is usually just as challenging. Again, the same crud that you want to escape packs a punch from the surface to the stratosphere. We’ll deal with that, too, at 300 knots, or maybe 280 if it’s bumpy. Already told the cabin crew to remain seated till I call them, when I’m sure we’re in safe, stable air. More griping from passengers, I know, but they’re not responsible for not putting a crewmember through a ceiling panel.

This is how it might look if anyone checked ahead (I did) so it wasn’t surprising face to face, really. Which looks more like this, and nobody’s getting to paradise till they work their way through this frontal line.

Eventually, we win: the further south we go, the more miles we put behind us, the weather–and the escape–become reality. You begin to get a glimpse of paradise with your 320 mile digital vision. The 20-20 eyeballs show the passage from land to water, a sure sign of warmer days for 160 souls on board, patient or not.

Soon it’s all blue, with ghostly outlines below that carve the indigo into brown and green, lush islands poking above the mild, warm seas.

Nassau, the Bahamas, straight ahead. Power back, begin the slow, gentle glide from seven miles high to sea level. More islands slide silently below the nose. Never tire of seeing the parade of blues, browns, greens; paradise.

Where’s the snow now? The icy grip of winter? Escape–by the lucky hundred and sixty aboard, each with their own getaway plan, winter runaways we eagerly aid and abet: someone has to break free, to teach winter a lesson.

A world away, if only but the blink of an eye in a lifetime, it’s nonetheless an eyeful. I’m happy for those who’ll stay, at least for a while.

Welcome to Nassau. For me, it’s a few moments of sunshine and sea air on the ramp while ground crews unload cargo, reload, refuel and get us turned around and ready for launch back to the north. Too soon, in a way, but not soon enough in another: this isn’t my escape–it’s my job.  From which, for the vagabond pilot, home is the escape. Will be back here, back and forth, all winter.

He’s headed home, too, a longer way back, but with a couple hundred aboard not facing the cold quite yet. But likely missing the scenery shrinking below as we climb and arc away to the north.

So long to paradise, hello radar scan; fuel burn, overwater navigation, peaceful cruise until you face the enemy line you already slipped through once today. Still there, waiting. The sun gives up, slips into the muck and so do you, both promising another trip around the globe another day.

There’s the final act of defiance, or maybe faith: through the choppy, sleet-streaked darkness, at 200 knots, toward the runway you better know is below the 200 foot ceiling.

Then it’s all about home, after appeasing the winter gods (“We brought at least as many back from paradise–you can ruin the rest of their season, plus make them wistful for the tropics the rest of the year!”) yet again. A healthy respect goes both ways; careful defiance, faithful flight. Starts again tomorrow.

Un-Pilotish: Just Say No.

Top of descent with a hundred knots of tailwind. You’ve been asking for a descent for the last forty miles with no success, and you know why: outbounds are climbing below you and worse, they’re staying low nose to nose because of what’s been a tailwind for you since the west coast–but which would be a headwind for them westbound.

So it’s the double-whammy: high, and hot; closing on the altitude crossing restrictions are cramping the descent algorithm–there’s not enough “forward” left to to execute a civilized “down.”

“Cross Fever at 11,000 and 250 knots,” comes the ATC instructions, and I immediately think of a captain I used to fly with in the 1980s who would have, without hesitation, answered, “We can do it–but we’ll have to leave the airplane behind.” Instead, I just say, “Unable.”

I know, I know: we probably could make the crossing restriction, but why play the odds? And if you’ve flown long enough, you know the odds are about 90% that this ain’t the end of the story: the Dreaded Hypotenuse. That is:

You’re going to get cleared direct to another point, shaving off the miles of “forward” you were counting on to execute the “down” at a civilized rate–with the same crossing restriction. Last month up in New York Center I heard a commuter pilot on frequency asking for relief on a crossing restriction he had innocently enough accepted fifty miles back: “Can we get relief on that crossing restriction?”

Without missing a beat, NY Center replied, “Absolutely not.” Now who wishes they were a heretic–or wants to leave the airplane behind?

And there’s the problem: “unable” is, well, un-pilotish. Which is actually not a bad thing to strive for. Here’s what I’m thinking: for some reason, the “cultural” aspect of being a pilot has insidiously taken on a life of its own: we can do anything, best any challenge, defy gravity, wear ridiculously big watches

–which is a latent “Flavor Flav” urge driving many pilots, which I’ve never understood–and sometimes we forget in the “never say no”  to a challenge mindset that one person we should more often say no to is ourselves. Still with me? Let’s have a new captain flashback.

Fog creeping up the Rio Grande Valley like a ghost; moonless night dark as space. Tons of gas, literally, and paper calculations that equal one good approach to minimums, then divert to San Antonio. Tidy plan. Works well on paper.

Unable? My ass: can do!

After the first missed approach (wow, the ceiling really is below the minimum descent altitude) the new captain consults the F-100’s “Progress–Fuel Predict” readout, which shows enough endurance for a second approach–then a divert to San Antonio.

Today’s captain voice-in-the-head, some 20 years more experienced, says, “Tell yourself no, stupid!” Divert now. For the record–then and now–I’ve never had a big pilot watch, or aviator sunglasses, or a creepy mustache, or any of the other silliness that seems to be part of the pilot stereotype. But I did have that “never back down from a challenge” mentality that I guess lands you in the cockpit in the first place.

“We’re requesting one more ILS, with clearance on request to San Antonio on the missed approach,” the intrepid First Officer relayed to the Approach Controller. Fine, thought the new captain; we can do this.

Second approach, same result: pea soup. On the second missed approach, Departure control sends us to Enroute: “State your request.”

We’d like to go direct San Antonio at 14,000′. San Antonio is now 1/8th mile visibility in fog.  You planning to hold?

Actually, planning to just say no–first to myself, then anyone else offering an uncertain gamble, challenge or no, in flight from now on. How unpilotish–and yet, common-sensical.

We raced the sinking temperature-dewpoint spread blanketing the state south to north with fog and landed in Austin with less fuel than I’d ever seen on the gages before–although my base Chief Pilot, over a couple of beers, told me he’d actually landed with less. He’s a “say no” guy now, too.

And that’s the whole deal: say “no” early–and often. Let Air Traffic Control manage their own airspace congestion without expecting an airshow on your part. Talk yourself out of any bad bets before anyone can even suggest you play the odds.

And above all–avoid the pilot stereotype.  It really doesn’t fly well, despite the mythology.

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Dear Santa: The Airline Pilot Wish List

December 2012

Subject: Wish List

From: Blog, JetHead

To: Claus, Santa

Sir:

As you know, it’s that time of year again. How about if we go ahead and stipulate the facts from last year: no, I haven’t been “good,” whatever that is, and neither have you so let’s drop that subject.

And yes, I have more than I probably deserve, what with a good gig in the Boeing left seat, seniority to be a little picky (still flying the all-nighter, Fatman? Bummer.) trip-wise.  So this year, on my Wish List, I’m asking for less:

For starters, how about a little less “ice fog?” I know, for you it’s “no big deal,” Rudolph, red nose, blah-blah-blah. But for me, it’s a Category III approach hand-flown to a fifty foot decision height (admit it: you’re cheating with the “red nose” crap, aren’t you?) which is no easy trick. Yes, I do appreciate the HUD you sent me on the Boeing two years ago . . .

. . . but despite the cosmic technology, less ice fog, more VFR this winter, please.

Also, less “fine dining.” I’m not talking about in flight, like this:

Or the usual Pie in the Sky that I keep eating to see if I can grow an ass as fat as yours:

Instead, I’m referring to the more typical “in airport” fine dining like this:

This is more the norm for “fine” airport “dining,” and it’s all too familiar to have not enough time for anything other than a five minute “shove a burger down your throat” experience at an airport food court between flights. Or worse, depending on the layover hotel and the local weather.

Which is another thing an airline pilot could do with less of: layover hotels.

I know you never do overnights in hotels, but those of us who do at least 150 days a year would appreciate a little less. Because depending on the location, the foraging for food can become pretty grim as well.

Got Imodium?

In fact, there’s the main thing all flight crews would like less of: less hotels, lines, vans, crowds, airport “security,” bad nights of sleep in noisy hotels, scant food, long hours and if you’re still with me, here’s the one thing we all want more of: home.

Because on Christmas, just like every holiday, birthday, anniversary or significant milestone any family ever dreamed up, there will be flight crews in the air or worse, stuck on the ground in “that hotel,” wishing for a little more home and a lot less away.

I know, Fatman, that isn’t the deal: flying means away–a lot. So just knowing that of the things I want less I’m going to get more and more; and the things I want more I’m going to have less and less (what are we up to now, 19 flight days a month?), we’ll just forget about your “list,” I’ll behave as awful as I always do this year, and we’ll call it even.

Thanks for nothing,

JetHead

P.S. When are you going to learn how to bid?

Holiday Air Travel Tips 2012

This year we’re going to do the holiday air travel tips different, for one good reason: leisure fliers never do what airline industry insiders recommend. Don’t know why; maybe travelers already know everything, maybe they don’t care—maybe they just don’t like to be told what to do.

Regardless, since air travelers so often seem to do the exact opposite of whatever the airline industry recommends, here’s our new approach:

–Don’t prepare ahead of time. Nada—no collecting your travel info (flight numbers, departure times) in one handy place. Rather, have a bunch of papers with boarding passes, itineraries, receipts and even hand-scrawled notes, cram them into your bag somewhere and pull them out, act confused and look for someone (and there are PLENTY of airport staffers ready help you!) to untangle the mess for you. Much easier than having your act together and your travel information at your fingertips!

–Bring your dog, and let the dog out of its kennel in the airport public areas! Everyone loves your dog, no one is allergic to your dog, and other dogs won’t react adversely to your taking “just a little break” out of the required carrier, on or off the plane, right? And do ignore whatever “business” it does on the floor because “It’s no big deal” and the airport has “people to handle that,” of course. So no one else in the airport could possibly worry about health hazards.

–Don’t pack sensibly. In fact, just bring everything that fits into your suitcase—never mind sorting out liquids or cosmetics; those will be sorted for you by the TSA. That’s what the screening is for, and the passengers in line behind you aren’t in a rush to get on their flights anyway.

–Do not put your name inside your luggage! If you do, once the flimsy luggage tag is torn off, the airline will know who owns the suitcase, rather than sending it on a Disney-worthy odyssey to the Land of Lost Toys. You want that, don’t you?

–Rely on the airlines for your basic caloric needs. Food has been plentiful on the airlines since about 1965, remember? So why shouldn’t you expect in the course of your 6 hours of travel that the airline will cater a meal for you? Don’t bring non-perishable snack for yourself and please, don’t bring water aboard the plane. Some nutty people actually have reusable water containers that they fill up after security, then bring them on board to ensure their own hydration. Crazy, right?

–Dress like a bum or a heroin addict. That makes it seem natural to all the service personnel that you’ll encounter that you have high expectations, even with questionable taste and hygiene, and so they’ll be ready to work closely and cheerfully with you. Please wear your headphones, have your music jacked up so that when the Flight Attendants ask you if you’d like a beverage, you can say, “What?” for the thousandth time in their very long day.

–Once you board the aircraft, hog all of the overhead bin space near your seat. Realize when the flight attendants announce on the P.A., “Overhead bins are shared space—please place one small hand-carried article under the seat in front of you,” they don’t mean “you” as in you. Rather, it’s the “Smokey the Bear” type “you:” like only “you” can prevent forest fires,” which doesn’t mean you personally, right? That’s everyone but you—and they know it. Act like you don’t even hear the P.A. as other passengers struggle to get their items stowed.

–Once your flight reaches your destination and parks at the gate, as soon as the seatbelt sign is turned off, do not remain comfortably seated. Rather, immediately jump up and either stand uncomfortably hunched over because of the overhead bin, or crowd into the aisle even though the door isn’t even open and you’re not going anywhere anyway until all of the passengers in front of you have gathered their belongings and moved up the aisle. Why wait? Cram yourself into the aisle.

There, now you have the latest “do’s” and “don’ts” and it’s up to you to sort out one from the other. Hope this new way of passing the information registers in a useful way but regardless, when human nature takes over and the “me first” priority rules the day, at least you’ll have a tall tale about your awful trip to regale your friends with. Bon voyage!

Special Note: as of today, JetHead has had 300,915 visitors.

Meditations From A Darkened Sky.

Day doesn’t give up the sky easily.

Last ditch, the blue fistfights with darkness like death: parts of the horizon arc fade differently, the sun exits dramatically or not; subtle or sudden, Ophelia or Faustus, depending on which way you’re flying and how high you are.

I mean east to west: bam, the sunset cattle-brands the horizon into an angry tight lip, then slams the sky shut like a granny purse, socking away the day for safekeeping, to snore under a fat pillow of layered cottony cirrus and leftover cloud piles, indifferent, floating; nothing to see here folks, so move along.

But eastbound? Not so fast: a jaundice swirls into the cloud bottoms, then fever fires the skyline like a malaria flush, the sun sighs itself westward, the horizon twists a blue frown–if you’re high enough, say forty-some-thousand–the downturn matches the curve of the earth, wingtip to wingtip. If you could hear it, dusk would be a groan; resignation, played out and spent, the day says “uncle;” hold that thought for tomorrow, finito.

Moonrise, maybe? Or not, depending on which rosary bead the month assigned to the comatose day, barely on life support and just waiting for last rites if the priest would ever get here. Yet, what is there to save? You pull the plug or you don’t, but the day flatlines regardless.

Like the cartoon before the main feature, the moon wants you to laugh, to goof around. “What the hell!” you say then wish you had the words back. Gotcha, again: joker luna burns her way through an undercast like an Alamagordo A-bomb. Or, just plain, unadorned, served up like tomorrow tossing a volleyball into today, shiny bone-white and perfect fine china, place setting for one but you’ll have to eat with your hands.  Any old way, any late day, the moon’s solid like the inner workings of a clock, underwriting tides and light in waves and wedges, depending on which blue you sail on.

And we sail on. Lights of passing ships, red on the right means a jet headed your way, emerald green and we’re fellow travellers. Sometimes moonlight makes their contrail glow like the luminescence of the deep sea and we’re just so many minnow streaking god-knows-where or why. Other times you only see the contrail when you cross it, then bump like a dumptruck when you do.

Opening act, the moonrise is: hey, where are you from? Seen it before; climb into the sky and race you till dawn, except celestial fine china never tires–but you do. You’re looking to the main event anyway: the Milky Way.

But tonight the Milky Way is part skim: atmospheric crud, even seven miles high, and you’ve got bad seats for the whole night show. What the hell, find your friends–Orion, never lets you down; Cassiopeia, vain beauty like you even looking at her, Ceres, you dog, and you, your jet flashing like a pimpmobile from below, insignificant from above. It’s a celestial tailgate, but you’re fake, manmade and only flying for now. But still.

Once it’s night, it’s just dark. Sure, we have the wubba, the blankie, the 14-satellite good to fifty feet GPS accuracy, and the guy in the left seat, keeper of the algorithms of gravity and lift and flight like the atomic clock that says when and how you fly and land. Because unlike the days sailing the night–you’re not really part of the heavens: visitor parking–and there’s a limit.

That’s okay. The non-stop must stop; it’s not “just flying,” which everything else in the sky does, but rather, “a flight.” And you, flyer for life, guy with the hands on the controls and the deliberately silent, taciturn “you’ll never get anything out of me” recalcitrance yet flying for all the years of your life, there is this. All of this; and you’re one lucky son of a bitch every time your feet leave the ground and the night sky lets you fly anyway.

When it’s all said and done, and you’re slipping through the terminal headed for home, and others wonder about your sly smile, you can’t help but think to yourself, how could I not?

But nobody would “get it,” really, so why say a word? Better just leave it at that.

Flying into Hurrcane Sandy’s Wake

You get the call from Crew Schedule. You don’t have to take the flight–but you do: it’s time to bring jets back into the New York metro area, ravaged as it is by Hurricane Sandy.

Means a different kind of thinking for you: more fuel (you’ll take any excuse for more fuel, won’t you?) for more loiter time and options depending on the weather, because you know the navigation aids and ground-based approach equipment has been damaged or may be without power.

There are twenty deadheading crewmembers on the flight roster, needing to get home, plus a half dozen others trying to commute to the three crew bases there (LGA, EWR, JFK) not to mention tons (literally) of backlogged cargo waiting to head east. All of that raises the jet’s zero fuel weight, but fuel is primary. You get hit up by commuting crewmembers–“Can you agree to land with less fuel?” No, I shouldn’t, I can’t, I won’t. You’re the captain, so you’re the asshole; you’re the asshole, so you’re the captain: all you want to see when the gear goes down on final approach is plenty of fuel to go somewhere else if need be. What a dick.

The First Officer today is one of the guys I really like flying with: serious, quiet, pragmatic; ex-Navy fighter jock, good guy. He’s one hundred percent behind the “Fuel is God” philosophy. Makes it easier.

We blast across the southern United States, bang a left at Atlanta, head for Tidewater Virginia then up the coast. Sandy’s loafing her way north and west, leaving the curved cirrus as her calling card up the eastern seaboard.

We grab the high ground, the 40,000 foot level to keep the fuel burn low and the tailwind high. As soon as we turn north over Norfolk, we begin to pick up Sandy’s claw marks along the coastline: even from seven miles up, starting around northern the Maryland coast, the shore looks as if a giant hand had raked the sand from right to left, east to west, as Sandy’s hurricane-force roar washed the sea and sand inland.

Lower now, abeam Atlantic City, New Jersey, we’re peeking through cloud breaks in Sandy’s sloppy remnants, and the view is ugly: the shoreline is swept clean of anything man made, and you know from a hundred flight through here that the shoreline was much more “humanized” until Sandy clawed it clean.

Sinking through ten thousand feet, the disaster takes on a detailed face: boats piled in front of houses; the normal geometry of streets and blocks skewed by wreckage, things that don’t belong; jumbles of homes, cars, boats; you name it.

Sand driven blocks inland. Cars strewn akimbo. Roofs ripped off. No lights; no warning lights–and no navigation signals, due to no electricity. You see the couple of blocks burned to the ground by uncontrollable gas fires.

Humanity, flashing by at 160 miles per hour. I don’t have time to look–but I can’t help seeing the destruction below. These photos are courtesy of a deadheading flight attendant, taken sideways from the “A” seat just forward of the left wing.

No worries up front in the 21st-century jet: our navigation and approach guidance is all based on satellites, processed on board and projected right in front of my fat face:

We lumber to our gate, with a mixture of relief and satisfaction: we’ll get the normal jet service up and running once again, get people moving, unstranded, reunited, home.

And we’ll ferry another 160+ souls westbound, away from the storm and the shipwreck that is the northeast coast. There are crowds inside “Fort Kennedy” who are waiting like refugees to move west, to go home. We’ll do the fuel numbers, the flight performance calculations, the take-off numbers down to a rat’s ass to make it work–and work right. If; no–when that makes me the asshole again, so be it: we will be safe, we will fly smart.

We’ll get that bird’s eye, god’s eye view of the coast one more time, at dusk, and try not to worry–but how can you not?–that in the gathering darkness, there are few if any lights below. We put that behind us at .8 Mach, but the human face doesn’t go away no matter how high you climb or how fast you go.

Can’t help but feel for those left behind. And those you know, stalwarts of Jethead like Miss Giulia and her husband Mike, the voice of Jethead Live: the remnants of the super-hurricane are headed their way; Peggy Willenberger, stormchaser who has made such extreme weather her stock in trade; Cedar Glen–didn’t he mention Ohio once, now taking a pounding?

And the millions left behind, salvaging what they can, rebuilding. We’re a quiet ark sailing westward, away from the storm, to a different and better now for the lucky ones making their escape.

Keep the fires burning; navigate, light the way west. Do it right–that’s your job, your part in this journey. Follow the night sky home.

A Pilot’s Eye View Part 1: The Way I See It.

If you’re a pilot, you probably see things about flying differently.  And it starts first thing in the morning.

Not so much looking at what’s in the local area, because you’re not spending any time there, right? It’s what’s happening across your route of flight that matters. There are other jets in the air transiting the route now, and their reports will affect the route, altitude and speed of your flight a couple hours from now, so you at least want to know what’s up and what the route planning for your flight is based on.

Okay, NOW you pay attention to more than just the road: which way is the prevailing surface wind? There are cues everywhere, but the most obvious and the most significant is, which way are the planes taking off?

And you’re headed north; they’re taking off south, means a longer departure with a big turnaround, so a longer outbound flight, right? Bad news?

Actually, no, it’s good news: you’re coming BACK from the north, so landing south will save you a few minutes on the go-home leg. That’s key.

Double check your gate. Of course, the smart pilot (or smart passenger) has even more current gate and flight information on a smart phone:

Just getting around the giant DFW Airport (the entire island of Manhattan could fit within the airfield boundary) takes time, but the payoff is in the sight of your jet from the Skylink train. I never get tired of spotting “my jet” from afar.

It’s a good feeling, knowing the jet’s fueled and ready to do your bidding for a day, to cross a few thousand miles and return to earth a workday later.

Now, I’m not a big “outside guy,” meaning I’m not a First Officer so the aircraft external inspection–we call it “the walkaround”–is not my preflight duty. But I’ll take you downstairs just this once.

You’ve got your head in the nose gear well–tow bar’s hooked up, ready for pushback. The red streamer is the pin in the steering bypass valve: the power to the tiller in the cockpit is disabled during pushback because with the cockpit nosewheel steering powered, any rudder movement will be transmitted to the nose wheel at about 3,000 psi of hydraulic pressure. They’ll show you that pin right before you taxi so you know your steering is enabled once again.

Now here’s a really cool feature that ought to make anyone who ever flies anywhere stand up and say, “I love Boeing jets.”  Seriously, this is amazing:

Your head’s now in the main wheel well, in the center of the fuselage–just look at the green light: that’s Boeing’s pure genius at work, it’s a nitrogen generator that fills the fuel tanks as they empty with inert, non-flammable nitrogen gas. Will not burn or explode no matter what happens in or to the fuel tank. How smart is that? And what a safety feature.

Okay, below, that’s the “vacuum zone” marked out in red: if that engine is running, you don’t want to be anywhere near the red zone, as it will literally suck you off your feet and into the engine. I’ve seen these CFM-56 engines create such a vacuum ahead of the intake that moisture from the concrete swirls up off the tarmac in a swirl and into the engines.

Here’s one main gear strut:

This is the main set of “sneakers” for the jet: they’re inflated to 200 psi and will roll up to 190 mph on some take-offs.

Really got to love the fat Boeing wing. And it sits higher off the ground than the MD-80’s spindly wing–after 10,000+ flight hours in the MD-80, this thing looks huge. Stay heads-up on the ramp: there’s ground traffic zipping every which way around your aircraft, and with hearing protection in use, you won’t hear them coming.

And watch out for jet blast from other aircraft adding breakaway power to start their taxi or pivot. See why I don’t come down here that often?

And back around the left wing . . .

Okay, satisfied? But while the exterior inspection is going on, here’s the captain’s biz you need to attend to. The flight plan, which, as you were already thinking about, will have a lot of assumptions based on the early flyers–which may or may not be valid now.

So you think fuel numbers based on your best instincts: winds? Ride? Weather enroute?

It’s all about creating and preserving options, and that’s all about fuel. Trust your instincts–if you think you need more, you do. Get it.

There’s the info sheet for the cabin crew–they’ll program that into the Boeing system that makes the PA’s with the video of the safety demo.

Seems impossibly calm and quiet when the jet’s empty, doesn’t it?

But it won’t been empty for long. The caterers have been here . . .

All’s well below and in back, so now it’s at last time for you to head into the flight deck.

First thing, get the dual Inertial Reference Units cooking. They’re just about at eye level when you step into the cockpit.

Next, stow your suitcase in the cubbyhole behind your seat:

Kitbag slides in beside the seat–no, there’s not much room, but it is what it is.

Now sit yourself down:

Get the instrument lights up:

Time to fire up your side of the cockpit: lights, displays; IRUs to align, comm cords, headset, pertinent paperwork; get the official weather off of the printer and make sure it agrees with the take-off performance planning–if not, adjust the plan. Consider the wind and the power setting.

A glance around the cockpit, scanning panels and at once you know every switch is where it should be or if not, you set it where it needs to be:

Now, you’re ready to go. Once the First Officer is settled in, we’ll check all of the navigation and performance data in the Flight Management System, verify the flight route clearance and waypoints, then run the checklists to get this 170,000 pound machine with 166 people on board into the air.

That story will be part two, coming soon.

What’s it like to be a flight attendant at a major airline?

What kind of lifestyle and career comes with a position as a flight attendant?

We get first person answers from a career flight attendant: the ups and downs, the joys and pains.

Next, on JetHead Live!

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Ask an Airline Pilot: Why Do I Feel So Worn Out After a Flight?

This is a question that I get asked by the most astute travelers: why do I feel physically worn out after a routine flight?

That’s a very good question, born of savvy observation among those passengers who fly often. And they’re right: flying has a direct physical impact on your body for very clear reasons, which I’ll explain. And–good news–there are some things a passenger can do to minimize many of these effects.

The culprit with the most insidious effect is one of the most obvious factors in your flight–and also the most underestimated, and that is, ALTITUDE. I’m only talking about the aircraft’s altitude indirectly, because what really affects you as a passenger is the cabin altitude.

The controlling factor in the cabin altitude is the the hull design of the aircraft. Because the pressure at altitude is a fraction of that at sea level, the aircraft’s pressure hull must have the strength to hold survivable (for humans) pressure in an extremely low pressure environment at altitude. For the sake of structural integrity, the difference between inside and outside pressure has to be minimized and the way to do that is to allow the cabin altitude to climb with the aircraft altitude, gradually, to a higher altitude to minimize the differential pressure.

The picture above is of a pressurization gage that shows aircraft altitude, cabin altitude–and the difference between the two. The aircraft’s pressurization system gradually raises the cabin pressure with the climb to altitude to keep the differential within the aircraft hull’s design limits. The result? At 41,000 feet, the aircraft cabin is over 8,000 feet.

That’s like being transported to Vail, Colorado (elevation, 8,000′) in a matter of twenty or thirty minutes. Suddenly, your body must make do with a significantly reduced partial pressure of oxygen, and this after being depressurized like a shaken-up soda can: every bit of moisture in your body–and gasses as well–are affected by the rapid (compared to a gradual drive from sea level to Vail) change of pressure.

This affects your body like the bulging of a balloon animal: the pressure reduced around you makes everything swell. Maybe not as dramatically as the balloon animal, but with definite and perceptible effect. And that cycle is repeated on the way down, in the opposite manner: your body must accommodate the repressurization.

Some people are more susceptible to the effects of altitude than others: I’m one who doesn’t feel well doing prolonged physical activity at altitude above 5,000 feet. I don’t like skiing or the outdoors type stuff in the mountains because of the flu-like effects of physical exertion at higher altitudes. Common side effects, or what’s called “altitude sickness,” include flu-like symptoms such as headache, body and joint pain, fatigue and a feeling of being out of breath.

If you’re the type who is susceptible to “altitude sickness” in any degree, you shouldn’t underestimate the effects of cruising for several hours at a high cabin altitude.

Next on the list of stress factors has to be humidity–or more importantly, the lack of humidity at altitude. The cabin air comes from outside at altitude where the humidity is around 1% to 2%. Fresh air is drawn in, heated, then mixed with cooler air to provide a comfortable cabin temperature. Mythbusters: I’ve heard the urban legends about “restricted air flow” to save money; recirculated rather than fresh air in airline cabins. That’s all bunk, at least in Boeing and Airbus aircraft. The cabin pressure is maintained through constant circulation and in the Boeing, large fans draw the air throughout the cabin and cargo compartments, then through the electrical compartments for cooling, then to an outflow valve for metered release with respect to a stable cabin altitude.

The pressurization and air conditioning systems work great, supplying fresh, conditioned air but . . . the humidity is very, very low because the source air at altitude is exactly that way. So, if you as a passenger aren’t drinking water constantly–you’re going to feel the effects of dehydration quickly at altitude.

The last of the major but often underestimated stress factors is also obvious but insidious: noise and vibration. Consider the basic fact that each engine on a 737 weighs over a ton and each has a core that spins at over 30,000 RPM at idle power. At cruise power, the vibration is subtle but distinct, transmitted through the airframe to everything and everyone on board.

That has a physical side effect added onto the motion effects of flight: pitch and roll changes in combinations you don’t experience on Earth. Like trains, ships and cars on a rough pavement, vibration is transmitted to your body and has a wearing, fatiguing effect.

Noise? Absolutely: there is a layered level of noise from engines, airstream outside and air flow inside that is both fatiguing and cumulatively, wearing.

What can you do about these three factors that can literally wear you out as you travel by air? Let’s start with the last factor: noise. This one has a really easy solution:

Earplugs. The foam kind, available in any hardware store. We use them in the cockpit all the time, because wind noise in the pointy end is much louder than in the back, depending on altitude and speed. They’re disposable, they’re cheap–and they work. You can still hear normal conversation just fine and the important thing is that they will reduce the fatigue level you will feel after a long flight. Try them on your next flight.

Low humidity? This is tied to the altitude effects as well, and this is a simple solution as well: hydration. Certainly on board you should be drinking plenty of water (yes, you’ll have to bring water with you–it’s available in airports everywhere; if you’re really cheap, just bring a bottle and refill it at a water fountain in the airport) but also, you need to think ahead.

Like the preparation for a marathon, you need to stay well-hydrated the day and night before the event.

If you step on board marginally hydrated or actually slightly dehydrated, the 2% humidity at cruise altitude will outpace any attempt you make to catch up, much less keep up. Coffee? Alcohol? Diuretic soft drinks? See photo above.

Finally, the high altitude effects of cruise flight. The good news is, going forward, that the next generation aircraft like the 787 “Dreamliner” are capable of maintaining significantly lower cabin altitudes during cruise. This is very important on long flights and the fact that Boeing designers recognized this passenger stress factor and have designed a way to minimize the effects underscores my original point about the stress.

For now, though, the best you can do is to deal with the other two key stress factors–hydration and noise–and simply try to be in decent physical shape: those who are suffer less with the stress of altitude exposure.

In the final analysis, you can’t completely avoid the physical stress of air travel without avoiding air travel itself. But, if you are a savvy traveler, you can at least recognize the effects and take simple steps to minimize the effects of air travel on your body and ultimately, your trip.

Bon voyage.

Ask an Airline Pilot

Have questions you want to ask an airline pilot but don’t have one handy? Or you notice that they’re busy with pre-flight duties (thanks for noticing and for not interfering) so you don’t say anything?

Here are the questions I get asked most often, with the best answers I can come up with:

1. Do personal electronic devices interfere with aircraft systems?

Answer: Here’s what you have remember about aircraft systems and electronic devices. First, many handheld or personal devices create an electronic signal, particularly if they have a cord of some type. Aircraft systems are constantly seeking out specific electronic signals from everything from Global Positioning Satellites to ground-based antennae for communications and navigation.

Further, even within the aircraft, there are electronics creating and transmitting electronic signals between systems for both navigation and control of other aircraft systems–including flight controls. It’s important that only the required signals are received by specific on-board systems and yes, extraneous electronic impulses can interfere with those required for control of various navigation and control functions.

Most have backups with non-electronic signals. For example, on the 737-800, the engines are controlled by an advanced solid-state dual system we call EECs. For every throttle movement, the EEC computers are sending impulses to the fuel control based on hundreds of minute electronic inputs from computers, sensors, instrumentation, and pre-programmed performance parameters. Worst case, though, if there is an interference problem or a failure, the system reverts to a “dumb” mode, simply using the old direct throttle and hydro-mechanical linkage. So in this case, any electronic interference is not a major problem–just an inefficiency.

Ditto in the approach mode: the aircraft navigation systems are receiving and displaying course and altitude data from ground-based antennae. If there’s a conflict or interference, we simply don’t use the data. That only changes the minimum descent altitude which again, is an efficiency issue: might have to divert if we can’t descend below the weather.

A final and more important consideration is in play though, when it comes to personal handheld devices during critical phases of flight. That is, the personal attention of the passengers–which needs to be directed to the crew. Not watching a video, or typing a text message, or listening to music. In critical phases of flight, passengers need to focus on and attend to the instructions of the crew.

2. How fast are we going on take-off and landing?

Answer: Well, it varies based on aircraft weight and flap configuration, but you can pretty much figure in a large jetliner that both the take-off and touchdown speed will be between 130 and 155 miles per hour (of course we use nautical miles per hour for our calculations). The jet will normally fly about ten knots shy of the computed take-off speed, but that is a minimum that doesn’t ensure maneuvering speed margins.

Speeds on takeoff and landing are always a spectrum of choices for the pilots. On take-off, we consider the climb gradient required due to obstacles or terrain ahead. More flaps offers a higher climb gradient and a lower take-off speed. A lower flap setting requires more runway for take-off but most likely can allow for a reduced power setting, important points for engine life and even noise considerations.

On landing, the higher flap setting allows for a slower approach speed, which is key when landing on a short runway. An interesting point you may not realize is that by design, the profile speeds for the stretched aircraft like the 737, 757 and 777 are artificially boosted to keep the nose position relatively low through both the take-off and landing rotations. That’s because the geometry of the stretched fuselage leaves a critically small margin between the tail and the runway on both maneuvers: in the 757, you have about 18 inches between the tailcone and the runway on take-off rotation and landing flare–not really much clearance. The higher approach speeds keep the nose lower.

Of course, upon landing on a short field like Santa Ana or even Washington Reagan or LaGuardia, the last thing you want is excess speed to absorb in stopping. No worries though: Boeing has given us the toughest landing gear and brakes in the air today.

3. Are most landings done by automation?

Answer: No. In fact, very few are, for a couple of good reasons. First, the ground based antenna must be kept free of any obstructions, and that specification and guarantee is only provided in very low visibility, which in itself is unusual. I mean that literally too: the airport physically ensures that no ground traffic of any kind–airport vehicles or aircraft–taxies by the antenna while an aircraft  is using the signal for landing guidance.

If the antenna isn’t specifically certified as free from any interference, the landing will not be automatic. Also, a special crew certification is required for autoland, and not all aircraft are equipped to do it: MD-80s, 757s, 767s and 777s  can all autoland if the correct conditions exist. But the 737-800 I fly does not have the capability to autoland. Rather, we have the cosmic Heads Up Display that allows me, the captain, to land with no ceiling and only 300 feet of forward visibility:

I can “see” the runway through whatever weather shrouds the actual runway–because the GPS system synthesizes a runway which exactly overlays the actual runway and I’m watching it all the way down. So at least in the 737-800’s I fly, you’ll never have an autoland and will always have a hand-flown approach and landing. And even when I flew the autoland-capable MD-80, I’d perform maybe one or two actual autolands per year. So the answer, generally speaking, is no, aircraft aren’t normally landed “automatically.”

The last question that goes with the group of “most asked” I won’t even answer, and I usually don’t when inevitably, someone has to ask: “Where is the   nearest bathroom?” The answer is, “I’ve answered the important questions above–I’ll leave this one up to you.”