Lou, you missed the point of the original question. He wanted to stuff
a detuned 12-A into an RV7 to make it fit the sport pilot regs.
Why detune anything, it is a bad idea.
You can comply with sport pilot regs for speed by simply placing the redline
that corresponds with the max speed for the regs on the airspeed indicator.
As an experimental a/p that is your decision to make. If you placard the
airplane
to comply with the rule, you are prevented from operating the airplane any
faster
even if you have GOBS of throttle available. If anyone asks, say you have
flat
rated the engine to allow for high altitude/ hot day operation. Done.
But speed isn't the only number of concern, Stall speed must be below the
max allowable in the regs also. That is probably tougher.
Scott.
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