> > > >Jerry Hey wrote:

 > > >>
 > > >>  I remember that fish tail mufflers did not hold up to the rotary's
 > > >>  heat and energy.  Does anyone recall their affect on performance?
 > > >>  If this restrictive termination of the 2 inch diameter exhaust pipes
 > > >>  did not harm performance, than I believe a 3" tangential muffler
 > > >>  without any restriction might perform very well.
 > > >>
 > > >>  Jerry

 > > >Those were too simple. They must be beefed up. You cannot merely
 > > >squish the end of the pipe and call it a true fish tail muffler :-)
 > > >
 > > >Paul Lamar

 > > I'm not planning on using a fish tail, but knowing its effect on
 > > performance would be very useful.   Jerry

 I built several "fish tail" mufflers and finally wound up with one that
 would last but it was just barely adequate in the noise suppression
 department.  The power was not noticibly reduced.  Except for the aero drag
 (mounted under the fuse) , the Spintech (www.spintechmufflers.com) is the
 closest thing to optimum I've tried so far.  I'm going to try and clean it
 up aerodynamically as soon as I find the time.  It costs me about 3 mph in
 speed in its current form.

 My guess about the "open ended tangential" muffler you described is that it
 would be loud.

 > Tracy Crook

Thanks Tracy,   I have been looking at the  Spintech web site.
Which muffler are you using?   Is it SS?    The flat racing muffler
could be hidden in the shadow of the lower cowl.   Jerry

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site. Copyright 1998-2002 All world wide rights reserved.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org