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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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