PPRuNe Forums - High Speed Stall

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Quote:

Originally Posted by John Farley (Post 4942907)

A stall at a speed above the normal 1g stall speed caused by manoeuvring is best described as an 'accelerated' stall. This can occur in any aircraft even if the aircraft cannot fly fast enough to experience mach effects.

I'm going to quibble with the use of the term 'best' and suggest 'usually' might be more correct. (A contest of pedants, perhaps?)

Personally I hate the term 'accelerated stall' for a "stall under increased 'g'" because accelerated can be easily confused with acceleration, and thus some people use the term to mean a "high entry rate" stall - a problem not assisted by the conventional stall demonstrations in Part 25, where the dynamic stall is at both elevated 'g' and a higher entry rate - 1.5 g and 2 kt/sec, for example. So some people attach the 'accelerated' term in their minds to the entry rate, not the load factor. I don't have a suggestion for an easy alternative term though - 'wind up stall'? - and accelerated is unfortunately common usage.

Mad

No contest

I accept what you say 'usually' is a better term

Standardisation ain't easy

JF

Quote:

I don't have a suggestion for an easy alternative term though - 'wind up stall'?

MFS

It's not going to work - we always abreviate Wind Up Turn to WUT, so it follows that we'll do the same with Wind Up Stall. WUT is OK, but WUS?:)

Well, there's already a "WUSS" - Wing Under Slat Surface, the portion of the fixed wing usually covered by the slat when stowed, but inportant in considering flow through the slat-WUSS gap.

Hell, I've had to keep a straight face while discussing the effect of SMURFs on aircraft handling....