12-06-2011, 10:53 PM
Is there a fixed alloted time to respond to an overspeed alarm without getting penalized? I know the idea is to avoid the overspeed in the first place
and I have adjusted my flying practices accordingly but some things just can't be avoided.
Case in point:
Today I was doing an East>West flight in northern USA (KSDF to KSMO) in my CRJ700 with planned cruise altitude of FL35. I set climbing cruise to
0.62 mach above FL20 climging to FL35 on A/P. Upon crossing FL29 the airspeed indicator suddenly jumped to .88 mach (Vmo for the CRJ700 is
335 KIAS / .85 mach). Within 3 beeps of the overspeed alarm I killed the AP, dumped the throttles and put out spoilers.
Evidently I popped up into the (imaginary) jet stream 8o. On instant replay I could see that I suddenly encountered an 80 Kt headwind.
I've learned to be wary of the increased airspeed during pitch over / leveling at cruise altitude and usually set a climbing cruise of Vmo -25 then
slowly increase to Vmo once things have settled. I can certainly take my medicine (penalties) when I've done something stupid...which is pretty
common
but come on....Dan.....fair is fair 
and I have adjusted my flying practices accordingly but some things just can't be avoided.
Case in point:
Today I was doing an East>West flight in northern USA (KSDF to KSMO) in my CRJ700 with planned cruise altitude of FL35. I set climbing cruise to
0.62 mach above FL20 climging to FL35 on A/P. Upon crossing FL29 the airspeed indicator suddenly jumped to .88 mach (Vmo for the CRJ700 is
335 KIAS / .85 mach). Within 3 beeps of the overspeed alarm I killed the AP, dumped the throttles and put out spoilers.
Evidently I popped up into the (imaginary) jet stream 8o. On instant replay I could see that I suddenly encountered an 80 Kt headwind.
I've learned to be wary of the increased airspeed during pitch over / leveling at cruise altitude and usually set a climbing cruise of Vmo -25 then
slowly increase to Vmo once things have settled. I can certainly take my medicine (penalties) when I've done something stupid...which is pretty
common


~~Don't worry, the plane is OK. Luckily your house was quite soft!
