All the designer can do is send you certified mail, and all its good for is
covering his six if you buy the farm in the airplane you built in deviation
from his plans, etc. There's nothing he can do to stop you from flying it.

"Ernest Christley" wrote in message
...

I have just been informed by the designer of the aircraft that I am
building that there is a possibility that he may not allow me to use an
alternative engine. Granted that weight and balance, as well as power
requirements must reasonably lie within allowable ranges, what is the roll
of the kit or plans manufacturer in the final homebuilt aircraft? Will the
FAA award him the power to veto my airworthiness certificate?



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