Model Variants (Including Prototypes)
VG-30 - Original prototype; Hispano-Suiza 12Xcrs engine.
VG-31 - Hispano-Suiza 12Y-31 rnginr
VG-32 - Allison V-1710C-15 engine
VG-33 - Hispano-Suiza 12Y-31 engine; adopted for serial production.
VG-34 - Hispano-Suiza 12Y-45 engine of 935 horsepower.
VG-35 - VG-33 with uprated engine
VG-36 - Hispano-Suiza 12Y-51 engine of 1,000 horsepower; revised undercarriage and radiator.
VG-37 - Long-Range variant; based on VG-36
VG-38 - Proposed model; Hispano-Suiza 12Y-77 engine.
VG-39 - Proposed model; Hispano-Suiza 12Z engine of 1,280 horsepower; new three-gun wing.
VG-39bis - Production model of VG-39; Hispano-Suiza 12Z-17 engine.
VG-40 - Proposed variant with Rolls-Royce Merlin III engine.
VG-50 - Proposed variant with Allison V-1710-39 engine.
VG-60 - Proposed variant with Hispano-Suiza 12Y-51 engine of 1,000 horsepower.