In going through some paperwork on N11851, Serial 1225, FAA records show that for a couple of years (1932 – 1933) this plane was licensed “Experimental” as it was demonstrating the use of an Augustine R-4-40 engine. Elsewhere in the file, it states that it was a two-cycle air-cooled engine. Norman P. Augustine of Buffalo New York was the registered owner.
I have found some information on the Augustine Rotary engine company in Buffalos New York. They do not mention that they are developing an engine for aircraft use. They did manufacture rotary engines for other use long before Mazda produce their automobile engine.