UNIVERASL ROTARY ENGINE MOTOR MOUNT



The universal low cost motor mount is one third the cost of the traditional welded tube motor mount. It uses rod end jointed links to support the engine. It was used by Bristol aircraft radial engines in WW II. It is a major breakthrough for mounting rotary engines in a wide variety of airplanes.







It will adjust in all dimensions for fitting into cowls exactly. Frequently a gear box prop flange will mis the cowl opening by a small amount. It is non problem with this mount. Also most kits require a small down thrust or side thrust angle. This too can be adjusted with this mount.




It will fit almost any firewall bolt pattern. Check out the end of the first page on http://www.rotaryeng.net for prices on some of the required bits. It will fit both composite and aluminum airplanes.



We had a guy building good motor mounts but he retired. Typically they cost $1500 plus expensive shipping. The trouble is; no two motor mounts are exactly the same for the wide range of rotary powered aircraft. Hand cutting and fitting tubes is an art. It can be done by a laser cutter but that is expensive and still requires a custom welding jig for welding.



The universal motor mount is super low cost to ship. That is the real cost saving of this approach. I recently had an engine shipped in a 3 foot cube box from Oregon to SoCal and it cost me $1000.




Nothing high tech, high buck here. No laser trimming of tubes. Any welder can make it. Coupling nuts are welded to the ends of the tubes to accepted the ball joints. These are machined on NC tools for accuracy. One of the lower tubes on each side is one inch square to stabilize the Barry rubber bushing holder.


The idea is at least one side tube keeps the rubber bushing cup aligned vertically.





Occasionally it requires a high angle rod end on certain airplanes so we have had some adapters machined to fill that need. Stock high angle rod ends are limited to about plus or minus 20 degrees.