The Borovkov-Florov I-207 (Istrebitel – fighter) was a fighter aircraft designed and built in the USSR from 1936.
I-207/M-63 – Three aircraft with M-63 engines plus provision for two FAB-250 bombs or two Merkulin DM-4 ramjet boosters under the lower wings. One aircraft later fitted with retractable main undercarriage retracting rearwards and rotating 90° to lie flat in the lower wings.