Mailing List flyrotary@lancaironline.net Message #7573
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: 2.85 redrive _ Tracy question enclosed
Date: Sat, 24 Apr 2004 21:31:57 -0500
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
wouldn't the most stylish approach be a new motor mount plate? that way you can reposition the prop where you want, too.
 
Marko 
 
I asked about this a week or two ago, and Fred said that it could probably be done.  The problem is that it will screw up tons of items, to the point where it just isn't worth doing.  Also, today I noticed that it doesn't look possible to move the engine enough by using the mount plate.  The top rings of the mount are only about 3/8" from the engine, so the engine can't be moved enough to remove the offset.  There would have to be a whole lot more space to move, in order to A- correct the offset, and B- keep the prop hub in the correct position.  Just ain't gonna happen.  
 
I measured the actual offset of the prop today, and it's 1.26 degrees to the left.  The gear appears to be about .2 degrees to the right.  If I offset the mount, I'd end up using a .5" shim on the left side, to give me a zero offset for the prop.  This would give me a 1 degree offset to the right for the main landing gear.   I think I could probably live with this.  As I see it, this is my only reasonable option.  
 
I don't know what I'll do yet.  I signed up for a -C drive today, and sent my deposit, but I'm sure I could put that toward my prop when Tracy comes up with a final price for shipping.  The smart thing to do, would be to wait and see what it will cost to convert my B drive to a C, and take that time to clean up the airframe, and get some good numbers using Tracy's old prop.  At that point, I could decide if I wanted to pursue this. 
 
What I'd really like to know from Tracy, is what his current climb rate is.  He said his VSI is pegged, at what value?  Also, his EM-2 has a VSI, which I'm sure isn't pegged.  This will make or break my 2.85 drive decision.  
 
Cheers,
Rusty (worked on wheel pants, and adding coolant, flying tomorrow) 
  
 
 
 
 
Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster