"c.j. smale" wrote:

I have been somewhat following the discussion about the mount plate for

the reduction unit.

may I suggest another way of doing it.
I have a mazda bell housing in my hanger which looks about the same

depth of offset from the engine to the reduction housing. it already has
the mounting for the starter motor. There is a large

hole in the transmission end  with bolt holes around the hole.
It would not be difficult to make an adapter plate which centers in the

hole in the bell housing and also centers the reduction unit.

This part would be easy to machine on a lathe without any special

tools. Offset could be adjusted in or out as necessary by

making the adapter plate into a cup shape if necessary. If any of
the builders have a 12 to 14 inch lathe many of these could be produced

quickly.

Engine mounts could come off the engine or reduction unit end of the

bell housing via 4130 tubing. These could be made in any

home shop with just a gas welding setup. The mount could even be

triangulated back to a bolt hole on the block to transmit thrust

loads. I have done a similar mount in my shop with just a

hacksaw,grinder and gas welder. Even the cups for the rubber

isolators could be made from tubing and sheet. This is even aircraft

quality if done carefully. Perhaps the builders could pool

their skills and tools and make multiple pieces for all.

smale@ncinternet.net

Good idea.

C.J., tell us more about your rotary powered Rutan Defiant airplane. Has
it flown? Where do
you live? Perhaps I could pop over and go for a ride :-) Take some more
pictures too.

Paul Lamar

marc wiese wrote:

This was more like what I was looking for. Uses the Mazda bellhousing and
starter mount. Adapting Tracy's redrive would take some work-and it would
make the prop farther from the flywheel, so an extension would have to be
fabricated to mate to the redrive.
Holes for both the bellhousing and the redrive would be drilled in the plate.
Good idea. An adaptation of Paul's design?
I'm interested.
Marc Wiese

What is the status of those patterns you used to make your bell housings
with the built in motor mounts C.J.? Pict below. They look great. It looks like we could 
adapt your casting to Tracy's gear box as well. I have been thinking about fronting the
cost of a pattern myself. I need someone to commit to machining it.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org