The Allenbaugh Grey Ghost Goodyear racer, No.66, registered N23C, was designed and built by Paul Schaupp for Ed Allenbaugh. A prone pilot required a fuselage of only 25 inch deep. The engine was behind the pilot.
The pilot, Dwight Dempster, was killed on the first flight when the engine failed on take-off due to oil sump pump failure. The Prone pilot arrangement was outlawed by the P.R.P.A.
Engine: Continental C-85
Span: 18 ft
Length: 19 ft 6 in
All Aero 