I calculated the loads and came up with some interesting numbers 
on the loads of the fore and aft tubes necessary to to brace
the landing gear. The green tubes shown in this giff.
They are quite high so these tubes must be on the order of one inch
OD. I really don't think they will get this high as I think
the tire will blow and the landing gear legs will deflect to the
point of the load at the fuselage being way less than six G's.

BTW Ken, any RV4 mount you design must accommodate these loads and I see no
way of doing that with any cantilevered configuration.

Note the loads of the motor mount per se tubes are much lower when the rubber
bushings are moved outboard (to gain clearance on the left side of
the engine) on the motor/psru plate. The upper tubes now go directly to 
the rubber bushing gismos instead of into a truss.

Paul Lamar
 
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