CRJ turb tgt spd
07-13-2007 | 03:12 PM
#1
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CRJ turb tgt spd
Hello,
In our company the turbulent air penetration speed is 280/.75 whichever is lower.
Was told by someone that when bombardier designed the CRJ-200 this was meant to be a MINIMUM speed meaning that if you hit rough air you are to accelerate to atleast that, much preferable something above that. The reason given was this speed designed to be a MINIMUM speed to guarantee buffet protection margin.
What does your company say about that and how do they have you fly? Have any of you heard about anything described above?
Thx
-schone
In our company the turbulent air penetration speed is 280/.75 whichever is lower.
Was told by someone that when bombardier designed the CRJ-200 this was meant to be a MINIMUM speed meaning that if you hit rough air you are to accelerate to atleast that, much preferable something above that. The reason given was this speed designed to be a MINIMUM speed to guarantee buffet protection margin.
What does your company say about that and how do they have you fly? Have any of you heard about anything described above?
Thx
-schone
07-13-2007 | 04:03 PM
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From: CRJ
Hello,
In our company the turbulent air penetration speed is 280/.75 whichever is lower.
Was told by someone that when bombardier designed the CRJ-200 this was meant to be a MINIMUM speed meaning that if you hit rough air you are to accelerate to atleast that, much preferable something above that. The reason given was this speed designed to be a MINIMUM speed to guarantee buffet protection margin.
What does your company say about that and how do they have you fly? Have any of you heard about anything described above?
Thx
-schone
In our company the turbulent air penetration speed is 280/.75 whichever is lower.
Was told by someone that when bombardier designed the CRJ-200 this was meant to be a MINIMUM speed meaning that if you hit rough air you are to accelerate to atleast that, much preferable something above that. The reason given was this speed designed to be a MINIMUM speed to guarantee buffet protection margin.
What does your company say about that and how do they have you fly? Have any of you heard about anything described above?
Thx
-schone
07-13-2007 | 04:12 PM
#3
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yeah its the same number i believe for every company. we had that discussion here a little while back on our company message board. we came to the conclusion that there is no way it is a minimum speed speed. if it were that would mean that at 2000 feet you would need to accelerate to 280kts if you ran into some rough air. i personally think it would be crazy if the rj's only protection in turbulance is to speed up. doesn't make sense. if it were rough air all the way down you could never land because if you slowed down the plane would stall. i believe the 280 is maneuvering speed, i.e. don't go faster than it for structural reasons.
07-13-2007 | 04:39 PM
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From: CRJ
07-13-2007 | 04:54 PM
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07-13-2007 | 06:23 PM
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From: Executive Transport Driver
If 280 was the absolute minimum speed they wanted you to penetrate turbulence at, then they wouldn't publish the following in the factory manuals:
At ACA/Independence we used 280/.75 as max penetration or 250/.70 for passenger comfort.
Also, FWIW, design maneuvering speeds vary depending on the aircraft weight and pressure altitude from as low as 161 knots (sea level, light weight) to as high as 305 knots (30,000' PA, 53,000lbs).
Design maneuvering speed (Va) is defined as Full Application of rudder and aileron controls as well as maneuvers that involve angles of attack near the stall, must be confined to speeds below Va.
Flight Crew Operating Manual, Volume 2
Limitations
Page 02-06-04
8. TURBULENCE PENETRATION SPEED
Maximum (emphasis added) air speed for turbulence penetration is 280 KIAS or 0.75 Mach, whichever is lower
Limitations
Page 02-06-04
8. TURBULENCE PENETRATION SPEED
Maximum (emphasis added) air speed for turbulence penetration is 280 KIAS or 0.75 Mach, whichever is lower
Also, FWIW, design maneuvering speeds vary depending on the aircraft weight and pressure altitude from as low as 161 knots (sea level, light weight) to as high as 305 knots (30,000' PA, 53,000lbs).
Design maneuvering speed (Va) is defined as Full Application of rudder and aileron controls as well as maneuvers that involve angles of attack near the stall, must be confined to speeds below Va.
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