catronfiskairplaneandenginecompany

That is aviator Frank Tomick, not Swede Meyerhoffer, on the right side of the frame. Perhaps his nickname was also "Swede"? See: Page 77 of the October 9, 1921 edition of The Pittsburgh Press newspaper In a tragic turn of events, Clarke would perish 27 years later while attempting to "bomb" Tomick's cabin with a bag of manure. From Wikipedia: On June 13, 1948, Clarke was flying his Vultee BT-13 Valiant to Kernville, California, with a pilot friend, Mark Owens. They were on their way to visit a retired fellow-Hollywood flying buddy, Frank Tomick. Clarke decided it would be amusing to drop a bag of manure on Tomick's cabin. "Clarke pushed the throttle forward in what was to have been a dive-bombing run. Tomick watched in horror as the plane plunged straight down into the ground and exploded. The sack of fertilizer had jammed behind the control stick, locking it."

The NX912 is in fact listed as an F-18 in the American civil register. Stig

Miss Hollydale was actually an International F-18 Air Coach

A rather mysterious aircraft variously called Fisk, Catron-Fisk or International F-10 or CF-10. The only entrant NOT carrying any kind of civil registration and one has to wonder how it was allowed to try and compete in the first place. Stig