LY777
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Does Low Climb Rate Means More Turbulences?

Tue Jan 09, 2007 6:58 pm

We have talked a lot about airplanes climb rates, but does a low climb rate mean more turbulences in bad weather conditions? I mean, if the plane climbs slowly, it will stay longer in turbulent clouds!What do you think?
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warren747sp
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RE: Does Low Climb Rate Means More Turbulences?

Tue Jan 09, 2007 11:56 pm

Of course, the sooner you can clear the clouds layers,etc. the sooner you have smoother air. Of course you can enjoy the view longer if you are a novice flyer.
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ThrottleHold
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RE: Does Low Climb Rate Means More Turbulences?

Wed Jan 10, 2007 12:11 am

Quoting Warren747sp (Reply 1):
Of course, the sooner you can clear the clouds layers,etc. the sooner you have smoother air

Clouds aren't always turbulent. Some of the worst turbulence is in the clear air around a jetstream, found at higher altitudes.
There's no point in climbing fast if you're only going up into a turbulent layer.
 
fly727
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RE: Does Low Climb Rate Means More Turbulences?

Wed Jan 10, 2007 3:04 am

The importance here is not how fast or slow you get out of turbulent air but how FAST the airplane flies through it and the effect the speed has over the structure.

Most airplanes have a turbulence penetration speed. One which guarantees the structural integrity of the aircraft, provides stall safety margins and gives most passenger comfort. It is often slower than the regular cruising and fast climb mode speed, so in order to achieve it, pilots have to decrease speed in level flight, or if they are climbing increase the rate of it keeping the same amount of thrust to make the speed decrease a bit and obtain the desired turbulent or maneuvering speed.

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Ryanair737
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RE: Does Low Climb Rate Means More Turbulences?

Wed Jan 10, 2007 4:08 am

Quoting LY777 (Thread starter):
We have talked a lot about airplanes climb rates, but does a low climb rate mean more turbulences in bad weather conditions? I mean, if the plane climbs slowly, it will stay longer in turbulent clouds!

Exactly, you have answered your own question there.

Quoting ThrottleHold (Reply 2):
There's no point in climbing fast if you're only going up into a turbulent layer.

Hmm..., I would see no point in delaying the climb rate if that was the case. ATC require a certain rate of climb (especially in busy airspace) to meet level restrictions on the way up. By purposely climbing in a slow rate you would firstly be using much more fuel and secondly you would be flying the aircraft in an uneconomical way, a way that it wouldn't like to be flown.

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ThrottleHold
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RE: Does Low Climb Rate Means More Turbulences?

Wed Jan 10, 2007 7:08 am

Quoting Ryanair737 (Reply 4):
Hmm..., I would see no point in delaying the climb rate if that was the case.

Well, if it's bumpy at 370, reduce the climb rate to zero and stay at 350!!

Quoting Ryanair737 (Reply 4):
ATC require a certain rate of climb (especially in busy airspace) to meet level restrictions on the way up.

They require enogh to meet crossing restrictions. Outside of that, 500fpm is all that is required.