X-Mozilla-Keys:                                                                                 
Tracy Crook wrote:

Ed Anderson wrote:

 Tracy, as I understand your design, it does not require the bell
housing as did the Ross drive.  
What is the diameter of your mounting plate (i.e. the
plate that bolts to the rear housing) and is it circular in shape?  I
looked by over the news letters and can find no dimensions.

        Thanks

I designed a bellhousing adapter for my drive but was not satisfied with it.
Some of the wall thickness dimentions were not good for a sand casting
design. (die casting was too expensive)  That is why I went to the plate &
spacer setup.  The plate (which is spaced away from the engine rear housing
by 3" spacers) starts out as a 16" X 13" (H x W) 6061 T6 plate.  The
un-needed material is trimmed off corners, etc.  The shape is roughly that
of the rear housing bolt pattern.  It extends below the engine (toward the
oil pan) far enough to accomodate the starter mount.

Some people have objected to this setup on the grounds that loose bolts &
hardware from the flywheel & damper assembly are free to be thrown out of
the   engine.  My feeling was that if there are loose bolts etc. coming off,
you have bigger problems than flying hardware to worry about .

I like this setup because it makes it very easy to inspect these parts and
correct problems before things start flying.   If the exposed damper &
flywheel bother you, it would be easy to enclose them with aluminum side
plates fastened to the spacers.

   The input shaft beating the crank shaft caught me by surprise on my Ross
drive because I couldn't see what was going on under the bellhousing. Yes, I
was lazy & didn't take it off regularly because it would require removing
radiators & other stuff.

Tracy Crook
www.rotaryaviation.com

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