Mailing List flyrotary@lancaironline.net Message #19357
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] Re: New to the list, and some questions.
Date: Wed, 23 Mar 2005 22:09:30 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
I agree with you Rusty.  I have hit 6800 rpm with my old 13B and believe that if you took a 13B and spent another 600 on lightening and balancing the rotating mechanism for say 9000 rpm, you would produce at least as much power as the Renesis.  On the other hand my "New" model is already 14 years old, so if starting from scratch, I would probably go for a junkyard Renesis.  Still waiting for the first RX-8 in this area to get rear-ended (no injuries of course).
 
Going to take a long nap! Yawn
 
Ed
 
 Truth be told, I don't think the Renesis will really outrun the 13B in our rpm range.  I think Mazda just made a better intake, and turned up the rpms.  There are certainly some improvements in the Renesis, but it's not light years ahead in performance.   It's absolutely possible to get 200 HP from a 13B at less than 7500 rpm, with nothing more than a street port, and a decent intake and exhaust.   Tracy was doing it, and I expect to be as well.  All that being said, the Renesis is clearly the future of the rotary, and there's no downside with the exception of a bit higher price at the moment.  I think the Renesis is a slam-dunk choice for folks starting out now. 
Cheers,
Rusty (must be Ed's nap time)
Mazda 13B rotary powered RV-3 (flying)
Kolb Slingshot (Mazda single rotor project)
Sonerai-IIL (next project in line)
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