Turbulence speed
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From: Venezuela
Turbulence speed
Hello everybody. I have a question regarding the turbulence penetration speed. The 767 turbulence speed is 290 KIAS/ .78 Mach. My question is, if the ECON speed is .77 Mach, should I accelerate to .78 Mach if turbulence is encountered?
Thanks
Thanks
Joined: Dec 2006
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From: The No Transgression Zone
Vtp is a comprimise between ending up dangerously fast or dangerously slow
as gusts can lead to both conditions... therefore without very good reasons one should not generally fly slower than Vtp either...I've written about those limitations before but I don't want to repeat all of that...I'll try to find those old posts as the argument is quite involved; note my typing at times is bad---so if I wrote something that doesn't make sense let me know...
http://www.pprune.org/professional-p...es-flight.html
my post in the above may make more sense in light of seeing FAR25.341
Note I'm speaking about a 'loophole' in the gust envelope
Electronic Code of Federal Regulations:
as gusts can lead to both conditions... therefore without very good reasons one should not generally fly slower than Vtp either...I've written about those limitations before but I don't want to repeat all of that...I'll try to find those old posts as the argument is quite involved; note my typing at times is bad---so if I wrote something that doesn't make sense let me know...
http://www.pprune.org/professional-p...es-flight.html
my post in the above may make more sense in light of seeing FAR25.341
Note I'm speaking about a 'loophole' in the gust envelope
Electronic Code of Federal Regulations:
Last edited by Pugilistic Animus; 27th August 2012 at 09:34. Reason: add links--and my signature emoticon
Joined: Jan 2004
Posts: 3,246
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From: Here and there
Yep, turbulence penetration speed is a target air speed for turbulence penetration. It gives adequate margin above the stall and below any limiting speeds assuming you're not flying too high for the conditions encountered. The type I fly allows for lower rough air speeds at low level to facilitate climb through the turbulent layer, but in general you should aim for the published RA speed.
Something else that people tend to forget is that it is a speed for severe turbulence. In your case you don't need to fly at M0.78 just because you've had to put the seat belt signs on. On the other hand you don't want to be caught out either. Personally I'd not worry about the speed for light turbulence, and I'd go for RA speed for moderate turbulence in case it becomes severe and of course try to find a better level and/or try to get out of the CB I'd blundered into
.
Something else that people tend to forget is that it is a speed for severe turbulence. In your case you don't need to fly at M0.78 just because you've had to put the seat belt signs on. On the other hand you don't want to be caught out either. Personally I'd not worry about the speed for light turbulence, and I'd go for RA speed for moderate turbulence in case it becomes severe and of course try to find a better level and/or try to get out of the CB I'd blundered into
.
Joined: Dec 2006
Posts: 2,486
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From: The No Transgression Zone
sevenstrokeroll Yes!!!
From your name I think you'd agree with me that these are insane performances!...
Gene Krupa
Gene Krupa - Shadow Rhapsodie - 1947
Gene Krupa - SING SING SING - 1937
From your name I think you'd agree with me that these are insane performances!...
Gene Krupa
Gene Krupa - Shadow Rhapsodie - 1947
Gene Krupa - SING SING SING - 1937
Last edited by Pugilistic Animus; 29th August 2012 at 03:24.
Joined: Dec 2006
Posts: 2,486
Likes: 8
From: The No Transgression Zone
Mr. Farley probably single handed...now I can't resist a few more--as he blows EVERYBODY out of the H2O---even Buddy Rich...everytime I'm at my kit I feel immensely inadequate as a result---sometimes I don't know why we even try...
Last edited by Pugilistic Animus; 30th August 2012 at 14:22.
