Don Bedwell

Don,
I have some CAD drawings ( AutoCAD 2004 or dxf) on the single crank, which
will give you a good idea of what you will be needing for the single crank
machining. You would have to allow for tolerances as given in the Mazda
manual, but it may save you some work.

I can also advise you on what materials to use or you could cut down a 2
rotor as Richard Sohn has done. I don't prefer the cut down method for
Aviation use as you would have to plug holes and reharden the new areas, but
it can be done and is a lot cheaper, just not my preferred method. Although
I must say making one from scratch on a home lathe, has a degree of
difficulty.  I also have the Rockwell C numbers if you need them.
Anything to help the single rotor members.

George (down under)

Are you charging for this information George?

Paul Lamar

Paul,
Not at all Mate!
Although it did cost a lot to find out this information myself, mind you if
is a commercial interest it might be a different story.
Just offering some help, I've given the information to others.
George ( down under)


Well how about us? :)

Paul Lamar

Paul,
I didn't think you were much interested in the single rotor stuff.

What you need;  E-shaft Material is 1045 ( .45 carbon) bearing surface is
hardened to 59 Rockwell (from memory). I will look that up again. The crank
is Induction hardened (best for 1045)- if you Nitride a different material
( say 4140, and what I'm using) you need to toughen the core.

There are two ways of  filling the rotor with oil, one as shown in the attached
drawings and the other is by way of drilling a hole/holes in the rotor (
inside bearing groove).

These are photo's I had to hand, but I can prepare others ( in another
format) if required.
George ( down under)