Nice to see you back posting Ben. We don't often get celebrity photographers here :-).
All full scale McAircraft people welcome.

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Back to the CAP and downwash angles. Right, it will tumble and I have seen one knife edge right off the grass forever it seemed, but for a given elevator deflection - up or down - the resulting diameter of the loop will be different due to the difference in elevator effectiveness due to the change in downwash angle at the tail through the loop.
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As a CAP lover (and ex-Pattern guy) you are on and off the throttle and elevator so much that it all works out to be nice and round. Kind of instinctive.
BTW my best CAP would easily out fly my best "purebred" (looks like all the others) Pattern ship in any sequence.
Pattern always has been a 'follow the leader' design exercise as you also know.

The 'one elevator position a loop does make' applied only to reeds. And I know you remember that as well.