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Search: Posts Made By: JohnDixson
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Forum: Rotorheads
21st Nov 2016, 21:29
Replies: 230
Views: 73,287
Posted By JohnDixson

That was awhile ago, Crab, but my dim...

That was awhile ago, Crab, but my dim recollection was that it was intended to soften the ride in turbulent air. Sort of a rigid rotor electronic version of an articulated rotor head delta three...
Forum: Rotorheads
21st Nov 2016, 16:37
Replies: 230
Views: 73,287
Posted By JohnDixson

Had a chance to fly the prototype Lynx with Roy...

Had a chance to fly the prototype Lynx with Roy Moxam in 1974, who briefed and demonstrated the collective G compensation sub-system. Worked fine. For a short while, we were planning on teaming with...
Forum: Rotorheads
21st Nov 2016, 12:06
Replies: 230
Views: 73,287
Posted By JohnDixson

"Once the rate of climb or descent builds up,...

"Once the rate of climb or descent builds up, then the effect of aerodynamic surfaces behind the center of gravity (e.g. stab / elevator, and tail boom itself) will act in the same way - pitch down...
Forum: Rotorheads
19th Nov 2016, 13:13
Replies: 230
Views: 73,287
Posted By JohnDixson

Crab, Perhaps the collective to pitch attitude...

Crab, Perhaps the collective to pitch attitude aerodynamic coupling is being underestimated, ( not to ignore the inherent rotor dynamics you mentioned ).

Best example I can recollect:

Original...
Forum: Rotorheads
12th Nov 2016, 11:36
Replies: 230
Views: 73,287
Posted By JohnDixson

This NTSB Report: ...

This NTSB Report:

http://www.rotorshop.com/sir9603.pdf

Makes for interesting but sobering reading and does mention a teetering limit at +/- 12 degrees. No detailed drawing of the head.

Good...
Forum: Rotorheads
5th Nov 2016, 12:02
Replies: 230
Views: 73,287
Posted By JohnDixson

Sounds like a version of the venerable ( ? )...

Sounds like a version of the venerable ( ? ) Wenatchee Snatch from western US logging has migrated to NZ. That sort of technique and the associated structural/fatigue loads is of course not reflected...
Showing results 1 to 6 of 6


 
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