S92 Rotor Tip Speed

[Tcabot113]

The tip speed is fast enough to cause hearing problems. So too fast. That advancing blade pressure pulse easily defeats traditional head sets. Read nor ways report.

TC

[JohnDixson]

S-92 Tip Speed

761 ft/sec @ 105% Nr. Tail is about 722.

The original Nr was 245.8, which was then increased during development by 5% to 258 ( present 105% ). Jack's note re reaching a free stream mach no of 1.0 at 165 @ -3C is therefore off a bit. Need to get to 191KCAS or so to get the tip free stream mach no up to 1.0.

BTW, UH-60 has been there and has data.