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

Hi Paul,

I recently bought an Oscar SK90, a sports racer with a 13B powerplant. These cars were built by the Oscar factory for the Suzuka 1000km race. I dont know the current state of the engine, time will tell.


Also a mate down here is considering a building a Vision, and installing a 13B with alloy endplates. What do you think a 13b with alloy end plates and gear box FWF will weigh??


Best Regards,


Russ Ward

New Zealand

About 250 to 260 pounds. 250 HP.

No turbo.

About one pound per HP.  A 100 HP Continental  O 200 is 2 pounds per HP.

Put a turbo on it and it is nearly unlimited :-)

Paul Lamar


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