After initial flight tests with the Fairchild-Caminez, the prototype was refitted with a 145 hp Axelson engine, redesignated Model 81A and delivered to the Boeing School of Aeronautics.
The Parks P-2 , powered by a 150 hp Axelson-Floco B engine was a biplane designed and built at the Parks Air College in the United States circa 1929.
Axelson, Caddell, Morrison and original drummer Steve Cummings formed the band in college, knowing each other from attending northern Virginia high schools (Axelson, Cummings, and Morrison attended Lake Braddock Secondary School in Burke, Virginia).