mad DOG nearly took a dip in the Potomac!

Timbuff10 said:
Ok, I got one... Lufthansa A340-300 (might have been a 200) departing DEN on the shortie 12,000' runway at 103 degrees. Fully loaded/fueled... The 5 APUs had it using up well over 11,000' of the runway. If not for the curvature of the earth it would have had to drive to Germany.
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The A-340 and A-330 are underpowered airplanes. Maybe someone can correct me, but I've heard that a fully loaded A-340 will have to do a step climb because they can't get up to their cruise altitude when heavy.
 
Reminds me of the time a Citation took off from UUU on a 2600 ft runway. All of us were lined up to watch, glad we weren't in the back.

It used up what looked like every single inch of pavement before it lifted off. I'm sure they knew they were okay though.

G
 
Almost any bizjet can be seen at BHB's 5200ft runway including Gulfstreams. Travolta's GII is a common visitor and takes up a lot of runway. Another family has a Global that is a sight to see come in. MOst of the time the take offs are not too nerve racking however some of the landing rolls cut it close. A couple of knots too fast and a hair too mught float and you really start biting your nails.

....Dont even get me started on the trafic pattern done there....

We will just say gliders with no radios and biz jets, hell anything dont mix.
 
Timbuff10 said:
Ok, I got one... Lufthansa A340-300 (might have been a 200) departing DEN on the shortie 12,000' runway at 103 degrees. Fully loaded/fueled... The 5 APUs had it using up well over 11,000' of the runway.
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Germany? How 'bout an A-321 going to the East coast!
 
Reminds me of a certain Simpson's episode.

"That's just the sound of the engines reving up. That's just a carp swimming by your foot."

"MMMMmmmmmmm."
 
Timbuff10 said:
Is this normal for the MD80 out of DCA? It was pretty humid and probably close to 90 degrees around the time. Full boat (ha, that's why they use the term boat) and I guess we had a lot of fuel since Cappy said we couldn't get over 30,000' till we burned off some fuel.

Oh well, I am alive... I think I will avoid the MD80s out of DC from now on.

Good luck with that thing Doug! :)
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Yes, that's normal. You have to understand how the performance issues work on a transport jet.

It's called a Balanced Field length...and it's something most small airplane pilots aren't familiar with. I was never exposed to it until flying at the airlines.

It is centered around a speed, V1, that is technically called Takeoff Decision Speed. At any speed prior to V1 the airplane should be able to stop on the runway remaining.

At or after V1, there is not enough runway to stop, but there is sufficient runway left to lift off. But not by much. At V1...the airplane still must accelerate to a higher speed for liftoff. This eats up an uncomfortable amount of runway...and you may not be lifting off until the last 1000' of runway or so. Travelling at 155kts...this can be sporty.

The one thing you know, however, is that at liftoff speed the airplane will climb. So you have to be patient and fly the calculated liftoff and climb speeds. After V1, you are solely focused on obtaining those speeds for liftoff and climb...and less so on the runway...because you ARE going flying...and the runway after obtaining V1 is not going to be of much use to you.

Flying airplanes at their maximum performance envelope is never comfortable...and something many of us never do. In the airline evironment...short runways always present the opportunity to perform a maximum performance maneuver.
 
I was glancing through jonnyb's photos and I thought that this one was pretty appropriate for this topic:

Rotate.jpg
 
SteveC said:
:D

1. I got it from jonnyb's pictures.

2. Go back in this thread and read B767Driver's description of Balanced Field Length and I think you'll get your answer.

:)
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Yea,yea,yea...but it got airborne (if you want to call it that) from the pic well after the numbers. If fact it hardly looks off the ground and at the time the pic was snapped at end of the runway and the ocean is right there...

Saying that no need to re-read B767Drivers post :)
 
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