Paul and All,
Before poor old Bill Jepson goes off air, I take the opportunity of
releasing a drawings of an improved VAM, we have been working on.

It has the internal tube as well as an external cover tube - both
provide cooling air to the exhaust.
There is a internal 'shock cones' which prevent a direct path of the
shock (exhaust) waves. These are mounted on the internal tube, which
provides for tuning the position of 'shock cones'.

The area in green is the flat plate opposite the exhaust tubes ( as in
the Jabiru design) but may not now be required, as we have the 'shock
cones'.

The external tube provides for cool air to mix with the exhaust but also
to limit radiant heat to the surrounding area.

The shape/ size of the reducers are governed by commercial availability
of Tube reducers.

The 3 inlet holes represent position for the single rotor and the double
rotor versions.

Please feel free to comment !
George ( down under)

------------------------------------------
Too late. All AOL people are now off this list and will be forever.
What a relief :)

You need to add a pipe at the front for ram air. Warm exhaust gases
will come out the front during idling.

Paul Lamar

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