Just as an update on what I am doing. I have a Zenair Ch250 I am
slowly rebuilding from an accident and late last year I bought a
recently damaged BD 4 . I have acquired 3 genesis rotaries . All are
probably scrap but allow me to work on the modifications I am
interested in. I have an arrangement  (loose) to meet up with an
engineer tomorrow to cut down an end plate . They are so heavy so I
am looking at ways to reduce the weight.

Alloy plates are out of the equation for me. I am thinking of
something like a oil sump steel pan to retain end water.  I was
interested in a single rotor engine as well but they don't loose
enough weight (unless all alloy) to make them worthwhile .

If I grind down the end plates loosing end plate intake passages I
thought I could supercharge or turbo through the two middle ports.

I have one other airframe which I believe is a JM-2 from Jim miller
plans but I don't have the plans. Anybody?Apparently it flew once but
I can't see how frankly. It looks very much like Pushy Galore. Single
rotor and turbo?


Mark Dillner


I think the first alloy plate I will offer for the Mazda is the rear
bell housing end. That should save about 20 pounds and is at the
forward end of the engine.

Don't give up on those engine before you measure the compression.
They might be fine.

We have a good way of doing that with a $60 Maxmite.


Paul Lamar

Pics of the Jim Miller plane please!!!


Bill Rayfield


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