The Arsenal VG-33 was one of a series of fast French light fighter aircraft under development at the start of World War II, but which matured too late to see extensive service in the French Air Force during the Battle of France.
The original powerplant was the Potez 12Dc flat-12 air-cooled inline engine, but the prototype was fitted with a Hispano-Suiza 12Xcrs, and flew in this form in October 1938.
Hispano-Suiza 12Y-31 powered prototype.
Allison V-1710C-15 powered prototype.
First production model with Hispano-Suiza 12Y-31 engine
697 kW (935 hp) Hispano-Suiza 12Y-45 engine.
360 mph (600 km/h).
VG-33 variant with newer engine.
746 kW (1,000 hp) Hispano-Suiza 12Y-51 engine.
Extended range version of the VG-36.
Projected for Hispano-Suiza 12Y-77 engine.
954 kW (1,280 hp) Hispano-Suiza 12Z engine.
393 mph (655 km/h).
6 x 7.5 mm MAC 1934 machine guns.
Proposed production version powered by a Hispano-Suiza 12Z-17.
Projected variant powered by a Rolls Royce Merlin III.
Projected variant powered by an Allison V-1710-39.
The ultimate projected variant powered by a 1,000 hp Hispano-Suiza 12Y-51 supercharged by a two-stage Sidlowsky-Planiol turbo-charger.