Mailing List flyrotary@lancaironline.net Message #7258
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: intake ideas?
Date: Sat, 17 Apr 2004 17:23:16 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>

The question of tuned runners is ‘how much is the benefit?’, and ‘what do you want to give up for it’.   
 
Thanks to you both for the comments.  I think Al hit the nail on the head with the above statement.  There are so many compromises that have to be made, particularly when you don't have much room to work with.  It would be great to see a direct comparison of a short intake vs a nicely tuned one.  AFAIK, no one has done that.  I know Ed had a short intake in the past, but I'm thinking that he changed some other major items (engine or fuel injection system?) at the same time he changed intakes, which would invalidate the test. 
 
I also agree about the injector placement, and I'm starting to think the best arrangement is either to have the primaries in the block, and secondaries in the TB, or all four injectors in the TB on a short intake.  Since I have both a 2 and a 4 injector version of the TWM TB, I guess I can go either way on the next iteration.  
 
BTW, Al, did you make that intake?  It's beautiful!
 
Cheers,
Rusty (wishing I was home where I could start working on the new intake)
 
 
 
 
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