Tuesday, January 02, 2007

 

Snow and Ice

I have been dealing with snow and ice for a couple of months, more so than a usual winter. Tonight, in Anchorage, the snow is falling heavily with visibility 1 mile, temperature 5 degrees, and light winds from the northwest. The inbound crew brought our bird in no more than ten minutes ago. Even in that short time, there is a lot of snow piling up on the air frame. They were forced to stop for fuel because of unforecast strength of the winds aloft; that is good for us, since their headwinds will be our tailwinds. We are two hours behind schedule...

A couple of children wanted to see the flight deck, which is unusual nowadays, so I took the time to show them around, even though I was very busy plotting our escape to warmer climes. Finally, with no seat empty, we pushed our snow covered bird back and prepared it for de-icing, then anti-icing. After the co-pilot ran that checklist, I told the de-icing crew to begin. Two trucks, one on each side blew the snow and ice away from the aluminum skin with heated water and glycol coming from a high pressure hose. Then the anti-icing trucks started to work, again one on each side, spraying a layer of very expensive anti-icing fluid onto the aircraft. From the moment they start the application of anti-icing fluid, the take-off clock is ticking away relentlessly. The fluid can absorb a lot of snow before it times out, but tonight a lot of snow is falling, so our time is short.

We cranked the V-2500 engines as fast as we could, received taxi clearance, and then began plowing snow with our landing gear. The co-pilot read the checklists as I responded to each item... Six minutes remaining... The taxiways are slick; ice covered with snow so I have to take it easy with the thrust levers... Four minutes remaining... The flight attendants are seated... The co-pilot calls for take-off clearance before we approach the end of the runway... Three minutes to go... We are cleared for take-off... I look at the tip of the wing on my side and can see the protective fluid is still OK; it looks like slick rubber with a layer of half melted snow flakes clinging... Two minutes before the fluid is timed out.

I turn the big jet 90 degrees to the right and line up on the snow covered runway. The centerline lights are about covered; they are mini-towers of white light because of snow refraction. It looks surrealistic... Thrust levers forward a bit to let the engines spool up and stabilize. Visibility is less than one mile now, winds are still light. The engines are stabilized at 30%... Then, thrust levers forward to the stops. The engines roar to full thrust shoving us down the white runway. I reach over my head and turn on my wind screen wipers; the electrically heated Plexiglas is melting the snow flakes as they strike.

92 mph... All systems good. The engines love the snow and cold air... The landing gear is transmitting some vibration from the mini snow drifts. The snow plows are on the taxiways watching our take-off, amber lights flashing, ready to make another run.

115 mph... The anti-icing fluid peels away from the wings and tail, as designed, and takes all the contamination with it, leaving a clean surface. The wings load up; I can feel it in the seat of my pants.

161 mph... The co-pilot calls out "V-1"; no turning back now...

178 mph... "Rotate"... Pull back on the stick and...

The nose lifts and all visual reference is gone, only twin spears of light shining into the white- out. I tell the co-pilot to leave the landing gear down for a few seconds to blow the snow away from the brakes and wheel assemblies.

"Positive climb rate; landing gear up." The gear unlocks and raises into the gear wells with a strong clunk. I am on the instruments; nothing outside except a fast moving tunnel of snow. I am holding 18 degrees nose up (the recommended normal climb angle), still, the aircraft is accelerating rapidly. At 1,000 feet, I lower the nose, pull the thrust levers back to climb power, and call for "flaps up" before we overspeed the flaps. The aircraft accelerates to best rate of climb speed in three heart beats, 270 mph... I raise the nose to keep this speed until 3,000 feet above the ground. Then, I lower the nose to pick up more speed, 287 mph (max allowed below 10,000 feet) until we blast through 10,000 feet above the ground.

I turn on the magic smoke and mirrors (auto-pilot system) above 10,000 feet, and then activate the flight management computers for lateral and vertical navigation, let go of the reins and let her run. At 15,000 feet, we fly out of the snow clouds into the moonlight. Clear and starry skies ahead... Forward icing shields "off". The winds, on our tail, are above 120 mph before we reach 20,000 feet. To our left, a green donut of heavenly light around the north pole.

Passing 30,000 feet, the tailwinds are 200 mph, giving us a ground speed 715 mph. When we reach our first cruise altitude of 34,000 feet in 19 minutes, we are 205 miles down the airway. That is incredible! It's no wonder our compadres had to stop for fuel.

Even though I had to work the Christmas and New Year's holidays, the Anchorage runs keep it interesting. Since we are running two hours behind schedule, the sun will be rising in 1,000 miles.

Comments:
It was definitely nice of you to show the kids the cockpit. When I was 17 years old (recently soled, with 15 hours in my logbook) I went to visit relatives in Chicago. I flew, alone, abroad a B-737 into O’Hara. After landing, I asked the stewardess if I could see the cockpit, if the pilots wouldn’t mind too much. “Oh, they’d love it!” she said. But, alas, they crew had made their getaway. It was a huge disappointment -- one I still remember. Years later, I got jump seat rides in an Airbus and DC-9. But I would have traded them in (maybe one of them, anyway) for a chance to talk to those pilots and have them show me around that cockpit. So, Dave, just think: You may have given some kids some great memories that will last them a lifetime!
 
Magic... When will you start to write the book?
ISH
 
I wish I could post a picture here. One of my earliest and favorite memories was visiting the cockpit of a TWA 727 after landing in St. Louis. The copilot gave me a set of wings, let me sit in his seat, etc. He made a big event of it, which was very nice. I'm sure after an L.A. to St. Louis flight, he wanted to get off the plane and grab a bite to eat. But he was all smiles, and it created a great first impression of aviation for me. It's part of the reason I'm a pilot today.

Here, I uploaded the photos:

http://www.rapp.org/wp-content/copilot.jpg

and

http://www.rapp.org/wp-content/cockpit.jpg
 
I remember being about five, and my mother was deathly scared of flying and I was always airsick.. and the flight attendants took us up to the cockpit to cheer us up, in the days when they left the door open. I will never forget my mother's awe at the fact that, "..the pilots had their sleeves rolled up and were actually drinking coffee!!" She was amazed at how relaxed they seemed :)
It's a great thing to do. I wish it were still easy in today's world. I got the little wings too. A great memory.
 
I was about...12 yrs old when I flew to mexico city in 1982. I asked to visit the flight deck and the pilots allowed me to stay untill touchdown! I was secured in the folding chair. What an adventure for a 12yr old boy!

I know security measures keeps the pilots more insolated during flight but please keep showing them all those dials and screens...

Best regards from Monterrey, Mexico
 
Similiar experience to some above. I was 13, and was in a 727 with my parents, going from Madrid to Malaga. After we reached cruising altitude, a flight attendant came and asked me and another kid if we wanted to go up to the cockpit. We did, and stayed there for the rest of the flight. During descent, when I assumed we would be told to leave, the pilot told us to hold onto the backs of his and the co-pilot's seats. So we did, me behind the pilot, him behind the co-pilot, and we stayed there for the landing.

Probably one of the reasons I've always been fascinated by flying.
 
I don't have a good cockpit story from when I was a kid. My first airline flight was on a TWA B-707 (maybe 720) direct from OKC to LAX and I stayed in the back and flirted with a girl the whole flight. Don't get me wrong, I loved airplanes, but I'd already flown in a 172, and well, you have to have *some* priorities in life.

Dave, I linked you and stole a thumbnail image over at DailyAviator.com. I've done that a few times over the months. Let me know if that's a problem.
 
Hi Dave,

I love your blog very much even though that's what I do everyday. Flying a 734, about the same flight pattern, multiple sectors (you call it legs), same scenario, same sometimes-maximum sometimes-minimum rest period... it's fun ain't it. I was offered A330 four times but I rejected, twice on 777 and once on 744. I love 734 sooo much. I love multiple sectors rather than one long long-haul flight.

But just err... one question, why do you tell us your speed in mph? Come on, just tell us in knots man. :) I know you're relating those speeds to those who are non-flyer but I hate it very much to convert it by multiplying another 1.15... heheh

Cheers
 
anonymous pilot- well, ok, maybe I can put knots in parathenses for all my pilot readers. You're not the first to comment on that, by the way.
 
Can this picture be attributed to you?
http://www.airliners.net/open.file?id=1123601&size=L

I see geezer glasses, A320, weird time of day to fly...
 
Never mind the technicals and geeky stuff, this is beautiful writing.
 
Nice entry! But what really caught my attention was your comment about the peculiar weather. I'm from Finland and it has been one of the strangest winters in centuries. Actually meteorologists have commented that there hasn't been an winter like this in the last 250+ years at least. In your entry you commented that there has been an lot of snow and problems with icing which is just the opposite of what we are experiencing here. Normally in the winter time temperatures drop easily below -25C and snowfall is measured in meters. This year the average temperature has been zero to +3C and there's no snow on the ground at all. Every day it just rains water but no snow. Ski resorts, snow-mobile companies and such are having the worst year ever! Even the grass is green and most of local fauna act like it's almost summer again (fur coloring, migrating of birds and such). What's going on? Is this part of the global climate change? God only knows..

But hey- keep up the good work! I've been an big fan of your site for a long time and I consider your blog to be something exceptional! Personally I currently only fly soaring planes, but aviation (of any kind) is close to my heart.
 
A fascinating description from the flightdeck as I re-lived my dark 5.00 am departure from ANC nearly 2 years ago. A unique adventure for me - I had not experienced de-icing before, nor take-off in falling snow - which I found very surreal and exciting! I had no idea about anti-icing fluid, how it worked - nor the precision timing required. I read your post with goosebumps and excitement! Brilliant!
 
this actually isn't a comment but i have a question. do you know anything about maxjet? do you know how they find their pilots?
 
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