Paul,  I have Chris Harris of planexhaust  rebuilding my exhaust system and he called me to ask if this muffler of yours actually worked??   I told him that Paul Lamar designed it and he was suddenly interested.  I have already sent him the plan, but he wanted your official design and if possible the Y tube recording of the muffler in action.  Can you forward both to him at sales@planexhaust.net   please. He says he either knows you or has a mate that knows you very well, so he  can ask you any questions direct which stops me from any misinterpretation.  Not only that but you are all awake 8 hours before me here in Oz, so by the time I get to ring him tomorrow he should know all.

Thanks Paul,  Neil.

It amazed me it worked :)

I was thinking about it today. If we can get 10 pounds
of thrust at 300 feet per second (204 MPH)  3000 foot pound
per second HP or 5.45 HP is for free :) However most of the benefit
I suspect is lower back pressure.

That is not much increase in speed.

I hope you are still flying while the new muffler is being made.

I have got to get over there and go for ride when
I get this turbo compound project done.

My AN24 SS hose coupling idea did not work out. The SS wrinkled at about
30 foot pounds.

The rotary accelerates  rapidly when it starts.
It goes from cranking rpm to 2000 in flash.
That could put a lot of transient torque load on the coupling
due to the power recovery turbine inertia  so I figure I need about
100 foot pounds.

I am going to try two one inch steering gear u-joints back to back.

Paul Lamar