Model Variants (Including Prototypes)
F.4 - Base Production Series Designation for single-seat fighter models.
F.4A - Base F.4 single-seat fighter models converted to two-seat touring type aircraft.
Type A.Mk I - Base F.4 single-seat models converted to two-seat long-range aircraft.
Type AS.Mk I - Based on the Type A.Mk I and fitted with floatplane landing system.
Type A.Mk II - Base F.4 single-seat fighter models converted to four-seat aircraft with cabin.
F.6 - Base F.4 single-seat fighter models converted to two-seat aircraft.
A.D.C. 1 - Single-Seat Fighter produced by the Aircraft Disposal Company; fitted with Armstrong Siddeley Jaguar radial piston engine of 395 horsepower.
A.V. 1 - Single Prototype Example for engine testing.
Nimbus Martinsyde - Single Production Example by A.D.C. (Aircraft Disposal Company); fitted with Nimbus series engine of 224 horsepower.