Tupolev ANT-21

ANT-21 (MI-3)
General information
TypeFighter
National originSoviet Union
ManufacturerTupolev
Number built2
History
First flight1933
Developed fromTupolev ANT-7
Developed intoTupolev ANT-29

The Tupolev ANT-21 was a Soviet twin-engined four-seat heavy fighter, which also had the designation MI-3 (Mnogomestnyi Istrebitel – Multi-seat fighter). It was not accepted for production, only two prototypes being built.