Mailing List flyrotary@lancaironline.net Message #19915
From: John Slade <sladerj@bellsouth.net>
Subject: RE: [FlyRotary] idle speed with RD1 redrives?
Date: Fri, 8 Apr 2005 11:15:49 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
Rusty,
I have the same rattle at about the same rpm.
I spoke to Tracy about this recently. I think he said it should be at a lower rpm, but even at 1100 or so it's normal and not to worry about it so long as the run-out remains unchanged. I have my idle set below the "rattle rpm" so I'm not dwelling in that area much. If you talk with Tracy and confirm (or deny) this - let me know.
 
 IIRC, the RD1 drives have a low rpm point where they're known to rattle.  I guess this is torque reversals, or something like that from the engine.  Anyway, can someone confirm that this is true, and tell me what rpm this is supposed to happen at?  I've never been able to idle below 1500 or so, but now, I could probably idle down to 1000 easily.  The problem is that I seem to hit this rattle mode at 1100-1200 rpm, so I've got my idle set at 1400 for now. 
 
Thanks,
Rusty (wondering if I should have inspected the redrive following the oil out)
 
 
PS- TIG and Plasma machines both got 1.5 inches of water before I picked them up, but I dried them out yesterday, and they both work now (thank goodness).  Fortunately nothing expensive was damaged in the flood, assuming we don't have to replace the carpet in the great room.
Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster