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From: "Joe Ewen" <Jewen@comporium.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-2080480@logan.com>
Subject: Re: [FlyRotary] Rotary for RANS S--16?
Date: Sat, 2 Jun 2007 14:51:52 -0400
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Hi George,
A 13B should be a comparable installation to an O-320 (per Aviator's Guide 
to Mazda Rotary Conversion, by Tracy Crook, eleventh edition 4-2002, page 
109.)  The 13B installed weight while comparable to an O-320, would give you 
slightly more horsepower than you require.  IMO a little extra HP is not a 
bad thing. If you need a source for a  used 13B you might want to try RX7 
World (rx7world.com 866-230-6173.)  Ernst at RX7 world found and rebuilt a 
20B for me and he is very open to doing work for aviation applications (he 
is an A & P.)  Buying a new engine may have some merit - if you have a used 
13B rebuilt it can cost almost as much as a new Renesis (rebuilding yourself 
may have a bit more savings.)  One advantage to the Renesis is a lower EGT 
than the preceding 13B engines, making the exhaust system reliability a bit 
easier.  The trade off is a slightly higher cooling load, but that should 
not be problematic for your situation, since you will not be pushing the 
total HP capability of the engine in your situation.  I am building a 
Velocity and am installing a 20B.  When I was shopping for an engine, I was 
told that 20B's were hard to find and I would be better off with a Renesis, 
so I bought one.  Later I was able to find a 20B, through RX7world, so I now 
have a Renesis available for sale that was built for aviation applications 
by Bruce T.  If you decide to got the Renesis route, let me know and I may 
be able to save you a bit on the Renesis.

Hope this is helpful and I am sure others are likely to give you some good 
comments.  I feel, The FlyRotary group is a great group, always ready to 
help and a great source of info.  I would definitely not be as far in my own 
application without the info derived from this list.

Joe


----- Original Message ----- 
From: "George Harris" <george@customcals.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Saturday, June 02, 2007 12:34 PM
Subject: [FlyRotary] Rotary for RANS S--16?


> Hi list.  I just joined recently.  I am considering rotary power for my 
> RANS
> S-16 (www.shekari.org).  I'm looking for a powerplant in the 130-140 hp
> range.  Most of the rotary conversions I've read about are higher power 
> than
> that.  The S-16, for those not familiar, is a little smaller than an RV-6,
> about 930 lb empty weight.  Factory recommended engine is the IO-240
> Continental at 125 hp, although several examples have O-320s in them.
>
> I talked to Bruce Turrentine, and he seemed more interested in the Renesis
> and sort of discouraged me on the 13B citing parts availability.  I guess 
> my
> question for the list is, is there a good configuration for that 
> horsepower
> level, maybe the 12B or something else? I would plan on using Tracy's
> reduction drive and engine controller.
>
> The bare engine weight of the IO-240 is 240 pounds by the way.
>
> Thanks,
> -George Harris
>
>
> --
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