This is for Alex's Tango but it will work on most tractor
     composite air craft.

     It meets the requirements of Industrial Metal Supply in
     San Fernando California for laser cut one inch tubes and optional
     welding. Some of the parts should be made by your local welder
     to cut the cost. IMS is expensive and laser cutting is not required
     for most of the small parts. I have the forward cups in stock
     at low cost. See the web site.

     One offs are expensive so a group buy would be cheaper.

     Paul Lamar

Hey Paul,

I'm sure I'm missing something here.  I don't see how the engine is
going to be attached to this device.  I see two points at the fan end,
labeled "Welding cups supplied in stock 2", that appear to be places to
attach the engine.  Those would do a great job of securing the engine in
the roll axis but I don't see where there is any provision for securing
the engine in the pitch axis.

     Mark LaPierre


Here is the engine installed.
It should look familiar :)


Paul Lamar


I got the mm jig done. Here are the pics.
Only took me  a few hours. Helps if you have a friction saw blade.

This little drill bit is worth its weight in gold for
drilling sheet metal.

BTW my hangar neighbor Jim Poole worked for Bristol during the later period
of WW II and he told me Bristol used ball joint motor mounts on their sleeve
valve radials.

Paul Lamar

The rod ends can be clearly seen in these pictures of a Bristol radial.

https://sites.google.com/site/merlinv12site/Home/bristol-hercules-264

Paul Lamar


Here is the Zoche implementation of the ball joint motor mount.
http://www.zoche.de/Zoche_video.html

Notice the engine does not move around as there is no rubber in the
engine mounts. If nothing else diesels are known for their high vibration levels :)

Perry Mick's 13B rotary is bolted solidly to the air-frame in his LongEze
and has been for 650 hours.

Paul Lamar

This is the latest iteration of the rubber bushing holder.

There is a slight twisting moment due to the offsets of the two pivots.

That is taken out by tack welding the lower tube to the bracket.

This rotary engine motor mount in conjunction with Jeff's gear box adapater plate will fit just about any exp aircraft firewall and can be shipped in an 8" by 8" by 30 inch long cardboard box.

Paul Lamar