Ed,
I believe if Dave Leonard can now 'see
the light' through the muffler - it may be an indicator that the sound
waves have broken through the joining cones. In any event it will only get
louder at the passage gets bigger.
I figured this would be the weakest link in
the HushPower design as it concentrates all the energy into the smallest
area, holes in the cones also weaken the area - not so with our
design.
George ( down under)
Ed,
Reflective cone theory is what Bill Jepson
and I have designed into our joint venture exhaust
design - although I haven't finished it so I don't know
how well it works.
The principle is to maintain a clear passage
for the exhaust flow but redirect the sound waves (which are energy)
therefore turning the sound into heat. In our design the heat is
dissipated with cool air flow through the exhaust and further cool air
around the exhaust.
However this is not a cheap exhaust to make,
as mine is assembled out of a number of cones ( 1.6mm SS). I think the
cost of the cones came to $200 and then there's the welding. There is also
the fact that it is also not light because of the thickness of the
material.
The bottom line is that cones by their nature
redirect sound energy into heat. The idea is to not have a direct exit for
the sound energy - this has been achieved in this design by having the
sound waves inter the center of a cone which is blocked-off and is
redirected through the holes and redirected out.
So the theory in this design ( HushPower) is
sound - excuse the pun. The packing material merely protects the light
outer skin. There will be a tremendous amount of heat in the inner
chambers so I don't know how long they will last, maybe there thick enough
to take it ? However if their cheap enough just replace them.
George ( down under)
Sent: Thursday, January 10, 2008
4:34 AM
Subject: [FlyRotary] URL for
HushPower
It looks like Hushpower has been spun off from
FlowMaster. Here is the URL for the Hushpower site.
Ed
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