Peter Cowan/Lexi Cameron wrote:

-Hello Yvon,
I'd bet it is the same one because it did change owners around that time.
The guy who added the engine to the previously built fuse was Daniel

Troie

who was also in the Montreal area (Terrebonne).

Daniel says it is aprox 2.2 to 1 as are most transmission 2nd gears

although

the last owner claims it is 2.6. I will check this shortly.

Who made your maple prop?

Yes, Paul the last muffler section and the "silencer" is "Super Trap".
Wasn't this tried by someone else on this list? Ed?? I may have time to

bolt

it on tomorrow and take some sound level readings.
Peter.

I think the rotary might eat that Super Trap alive. If someone tried it
I forgot who it was. Perhaps Jeff Spitzer when he was working for Moller.

I have been thinking about the muffler lately. One thing that seems to work
is getting the gases to swirl around. We noticed this years ago with
the tangential muffler and Tracy noticed it with his muffler shown below.
Also another little bit of supporting evidence is the inserts in the

non-turbo

exhaust ports are very effective. I suspect, but cannot prove right at the
moment, that the long pipe Tracy uses is unnecessary. I think those little
tabs alone are the major cause of the reduction in noise Tracy noticed.

Paul Lamar

Paul,
A racing enthusiast has developed and is marketing a Turbo exhaust
(claims fuel economy etc.) it might however be good for aviation in regard
to noise reduction.
I am travelling their way next week and will investigate.
Don't know if it's a US rip-off or home grown product - do you have anything
like that over there !?
George (down under)

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org