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From: Bob Tilley <btilley@mchsi.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: muffler design
Date: Wed, 7 Jan 2009 13:22:43 -0500
References: <list-3415013@logan.com>


On Jan 7, 2009, at 1:09 PM, Charlie England wrote:

> I hope this attachment works.
>
> It's an email from the late Paul Conner with images of his 'muffler'  
> on his SQ2000. If you factor in 'goodness' as part of the quiet  
> equation, Paul had it all over anything else I've heard in over 10  
> years of watching (& hearing) rotary powered a/c except Dennis  
> Haverlah, & he cheats by using a Renesis. While his plane wasn't  
> silent, it wasn't any louder than a typical Lyc and it was much more  
> pleasing to listen to than a 4cyl Lyc (& quite a bit more pleasant  
> than the 2stroke-like bark of a typical rotary. It really sounded  
> like a healthy automotive V-8.
>
> It's also pretty hard to beat for simplicity and even weight.  
> Obviously cost a little HP, but real tuned headers + an equal  
> performance muffler would weigh several times as much & just might  
> drive the HP back to Paul's configuration. Run the HP vs weight gain  
> vs money numbers....
>
> Charlie


Folks,

Paul's engine had the Mazda exhaust manifold that shows in the  
pictures Charlie sent. It was not harsh or barking, in fact it sounded  
a lot like a small v-8. I never got to hear it in the air, but I was  
there for some of the ground runs Paul made. And of course I ran the  
engine on the back of my pickup after his accident.

Bob Tilley
Albany, Ga