Southern Airmotive Special / Roberts Special First flown on 14 Feb 1950, the Southern Airmotive Special (possibly N3900) was a single seat open cockpit biplane. It was operated as the aerobatic ‘Roberts Special”, piloted by Charles Roberts.
Only the one was built.
Engine: Continental C-85, 85hp
Wingspan: 20'4"
Length: 16'2"
Max speed: 130 mph
Cruise speed: 118 mph
Stall: 43 mph
Range: 350 mi
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