Thanks for the answers so far. i'm trying to find out why the slap is so prominent in the R22.
I've done the figures for the R22 as you have for the Huey Nick
, and they come out quite a bit slower, is there any other cause other than the blade speed approaching Mach 1.
Diameter 25'2"
Speed @ 104% Nr = 698 Feet Per Second.
With a Vne of 102Kts = 172 Feet Per Second.
Comes up quite a bit short.
It has been suggested to me that the noise is "the blades flapping to equality very quickly' I can't see this myself, but maybe i've missed the point.
I know that not everyone has inside knowledge of the robbie but all replies gratefully received.