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Forum: Rotorheads

29th Oct 2014, 22:26

Replies: 21

Sikorsky YUH-60A first flight 40 years ago to this day

Views: 7,833

Posted By JohnDixson

Growth Hawk

Originally, the design of the S-92 drive train envisaged a transfer onto the S-70, but it now looks like the next iteration will be the JMR.

Forum: Rotorheads

29th Oct 2014, 17:57

Replies: 21

Sikorsky YUH-60A first flight 40 years ago to this day

Views: 7,833

Posted By JohnDixson

Last few Ft

If you flew the 60B then, with all the gear aboard plus crew, the CG was more neutral, whereas if you taxi out in a 60A/L with just crew and full tanks, the CG is near the aft limit and it hovers...

Forum: Rotorheads

29th Oct 2014, 16:04

Replies: 21

Sikorsky YUH-60A first flight 40 years ago to this day

Views: 7,833

Posted By JohnDixson

UTTAS Rotor Brake

LW, struck us as unusual too. Recall that the Army personnel charged with developing what was called the Material Need Document was composed of a diverse group within the Army Aviation community....

Forum: Rotorheads

29th Oct 2014, 13:09

Replies: 21

Sikorsky YUH-60A first flight 40 years ago to this day

Views: 7,833

Posted By JohnDixson

Beanie

The beanie seen on various SA production models is typically part of the aerodynamic solution to what is termed " tail shake ". Tail shake occurs when relatively high strength vortices are shed from...

Forum: Rotorheads

28th Oct 2014, 20:45

Replies: 21

Sikorsky YUH-60A first flight 40 years ago to this day

Views: 7,833

Posted By JohnDixson

Tail Wheel/Rotor Brake Configuration Options

Both important design points, with decent arguments to be seen on both sides:

Rotor Brake. Not a mandatory item in the RFP. SA strategy in responding to the Army Req for Proposal ( RFP ) was to...

Forum: Rotorheads

23rd Oct 2014, 01:46

Replies: 21

Sikorsky YUH-60A first flight 40 years ago to this day

Views: 7,833

Posted By JohnDixson

History

Sans, the ESSS design was started from scratch.

Senior Pilot, when I retired, I left the UTTAS RFP and about 99% of my files for my successor, thus I cannot tell you the precise load time...

Forum: Rotorheads

22nd Oct 2014, 21:27

Replies: 21

Sikorsky YUH-60A first flight 40 years ago to this day

Views: 7,833

Posted By JohnDixson

Memories

Thanks Lonewolf, but in my case the toast would be just soda, as in 1989, with the aid of a very good friend, I realized that the good people at Bombay were distilling that product faster than I...

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