McKinnon Turbo Goose (N221AG)

Not really a "McKinnon" at all. It was designed as a model G-21F and built by Fish & Wildlife Service in Alaska and only claimed to be (but was never actually properly certified as) a supposedly modified McKinnon G-21G. As such it should never been certified in the Standard category as it was and instead should have been only as an Experimental category aircraft. Only way an aircraft is a "McKinnon" is if it is actually built by McKinnon in accordance with a McKinnon type design; anything else is really something else.