hey Paul, in running the rotary engine on its side, I was unclear
that was my fault, it is not a Mazda but I was referring to the

2 Sachs 295's I have. They are two stroke rotary's, all oil is mixed
in the fuel.

I want to make new end plates and stack them vertically to power a

small single seat helicopter. If all goes well with the fuel
injection boards and programmable ignition system on it I will then
attempt to make new cases for water cooling to see how much hp I can
get out of these little rotary's.

I figure that the rotors being on their sides could cause a problem
that is why I asked.

David Jr


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Mazda The cooling oil drain backs will not work right and the lower
rotor will fill with cooling oil causing a static and dynamic
imbalance.



Paul Lamar

2 stroke mode is AKA charge cooled. Using them in the 2 stroke mode
is doomed to failure. The big problem is the rotor bearing and apex
seal heat. You need to oil cool them both for high continuous power.
Hard to do when vertical. Best put a bevel gear in there somewhere.
Lots of history on this.


Paul Lamar

David, find a site that shows a rotary engine turning or pull
one end housing off one of your engines and turn the engine
over. That way you can see all four strokes happening
simultaneously. For a charge cooled engine you can not have
an oil sump like a four stroke engine. You need to mix the
oil like a two stroke cycle engine but it is a four stoke cycle
engine. It is ingenious how they all work together in such a
small package that is so powerful.

Dale Davies


Dale does not want you to use the term "2 stroke" Dave. :-)
Call it charge cooled.

Paul Lamar


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