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Topic: climb rate
Username: Firstofficer
Posted 1999-02-08 19:55:43 and read 1296 times.

Does anybody know the climb rate of an airliner after the takeoff/ after leaving cruise level?

Topic: RE: climb rate
Username: MD-11
Posted 1999-02-08 20:10:34 and read 1297 times.

It seems that 2500 fpm is a rather typical climb rate initally after take off. However the climb rate will decrease to about 1000 fpm as the plane climbs higher closer to the cruising altitude. ATC may of course wish a plane to climb faster/slower then what the optimal climb rate would be. The same with descents, while a usual descent rate might be about 2500 fpm, ATC may wish you to descend at 4000 fpm. This is all to the best of my knowledge of course.

Topic: RE: climb rate
Username: Virgin Atlantic
Posted 1999-02-08 20:41:23 and read 1296 times.

I agree with MD-11 but I have to say it all changes as you get higher as of density altitude alsolike at SNA they have some funny things and the planes go straight up to about 1500 power back then throttle up over the ocean.
Iain

Topic: RE: climb rate
Username: Noel Benford
Posted 1999-02-08 20:58:22 and read 1296 times.

"I agree with MD-11 but I have to say it all changes as you get higher as of density altitude alsolike at SNA they have some funny things and the planes go straight up to about 1500 power back then throttle up over the ocean."

That would be the noise abatement procedure. Sometimes pilots reduce to 500fpm or so and climb at cruising mach.

Noel Benford

Topic: RE: climb rate
Username: Speedbird
Posted 1999-02-08 22:15:36 and read 1296 times.

I would agree with MD11. Those are fairly typical numbers.

Topic: Also
Username: Virgin Atlantic
Posted 1999-02-09 00:21:54 and read 1296 times.

There are to types of climb
Vx which is more of a cruise climb so it is worked out by distance on the ground.
Vy is done by height you work that out by height.
Iain

Topic: RE: climb rate
Username: CapK
Posted 1999-02-09 01:21:06 and read 1297 times.

On initial climb out of several airports, I have noticed a VERY quick reach of 10,000ft. Out of TPA on a United 737 we reached 10K in about 2 or 3 minutes..I would imagine our rate of climb was conciderably higher than 2500fpm. I tried getting up to that altitude on flight sim and I had to set the VS to about 4500-5000 ft. Of course this is probably quite different @ other airports.
When I asked a UAL pilot about the flight he indeed told me we had hit 5000FPM.
He said that burned quite a bit of fuel but we had to clear the busy Macdill AFB and St. Pete/Clearwater Int'l airspace. Just some input..
All the Best,
CapK

Topic: RE: climb rate
Username: Noel Benford
Posted 1999-02-09 04:33:08 and read 1296 times.

Yea. They usually rocket up to 10k, then level a bit to get the speed up, then cruise-climb it. Going or several minutes at 20 degrees nose-up doesn't sound too enjoyable! ;-)

Noel Benford

Topic: RE: Also
Username: Dash8
Posted 1999-02-09 21:43:26 and read 1296 times.

Actually Vx is anything but cruise climb. Cruise climb is used for delay recovery or when you're empty. You climb at higher speeds, which means reduced climb capability. A Vx climb is the max climb of the airplne for a short distance for obstacle clearance or noise abatement. On the long run Vx doesn't get you anywhere. That's why is a Vx climb is required they swith as soon as possible to the normal climb speed, which is what you mentioned under Vy.


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