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----- Original Message ----- From: "Jim Sower" <canarder@frontiernet.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, January 22, 2004 2:49 PM
Subject: [FlyRotary] Re: Torsionals
<... The resonant frequency for his drive is down low in RPM. So the
rubber
bushing actually help push it lower ...>
OK. I thought Tracy's was high. So Tracy's can rattle some at low idle
so
raise idle rpm out of that range, rubber bushings would (presumably) drive
Tracy's all the way below idle range, or at least "soften the blow" when
it did
rattle.
Am I getting any warmer? ... Jim S.
Red Hot, Jim. Tracy's gear box will supposedly rattle if you get the idle
low enough, but I suspect its well below 1200 rpm and most aircraft
installations idle at or above 1200 rpm.
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
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