When Merian C. Cooper was in charge of production at RKO Radio, virtually every other film produced at the studio had an aviation theme or tie-in. Set against the backdrop of a barnstorming air circus, the story concerns the travails -- both in the air and on the ground -- of flyboys Bud (Eric Linden), Ace (Bruce Cabot) and Speed (Ralph Bellamy), and female pilot Ann (Arline Judge). Speed is married to Ann, who falls in love with Bud. Seeking revenge, Speed intends to murder Bud during an air show, hoping to make it look like an accident. But Bud's brother Ace foils Speed's scheme, saving Bud's life at the expense of his own. Flying Devils was one of a handful of films directed by legendary press agent Russell Birdwell.
by Hal Erickson synopsis