Dynamic stall discussion

[winny]

I have a question...

Is a dynamic stall the same thing as what the British refered to as a 'high speed stall'?

[Skoshi Tiger]

Originally Posted by winny

I have a question...

Is a dynamic stall the same thing as what the British refered to as a 'high speed stall'?

I was just wondering the same thing.

After reading the Spitfire MKI manual, I was doing a few stalls. From 250mph I was pulling back on the stick into the climb before stalling at about 160mph, drops a wing violently and then enters a spin.

Unfortuately it's hard to work oput if this is due to a dynamic stall or an accelerated stall.

If we knew what G's we were pulling be able to calculate the stall speed. If that corresponded to the stall speed in the test, then that would indicate a accelerated stall and not a dynamic stall, Or we could ask a question to the developers (which Insubar already has) and wait for a response.

Cheers!

[bongodriver]

at 2 g's its about 1.4 times the static stall speed, I seem to recall the formula having something to do with the square root of the G's

[Insuber]

Originally Posted by Skoshi Tiger

... Or we could ask a question to the developers (which Insubar already has) and wait for a response.

Cheers!

Yes it is what I did, despite the desperate efforts of my friend Ace to entropyze the discussion ...

[IvanK]

Originally Posted by winny

I have a question...

Is a dynamic stall the same thing as what the British refered to as a 'high speed stall'?

No A High speed stall is the same as an accelerated stall. i.e. A stall occurring at greater than 1G therefore at a faster speed than the 1G stall ... but occurring at the same AOA. If your 1G Stall speed is say 100Kmh your 4G stall speed would be 200kmh (1G Stall speed X SQR of the Load Factor).

A Dynamic stall is another condition that involves Stall AOA and rate of change of AOA.