Model Variants (Including Prototypes)
Yak-7DI - Initial Development Model Designation based on the Yak-7 production fighter.
Yak-9 - Base Production Model Designation; fitted with 1,300hp Klimov VK-105PF-1 OR 1,360hp VK-105PF-3 powerplants; 1 or 2 12.7mm machine guns with 1 x 20mm cannon.
Yak-9B - High-Speed Fighter-Bomber Variant; featured capability to carry an internal and external combined bomb load of up to 1,323lbs.
Yak-9D - Long-Range Variant; fitted with VK-105PF-3 engine; increased fuel capacity.
Yak-9DD - Extreme Long-Range Model fitted with drop tanks; based on Yak-9D model.
Yak-9K - Anti-Tank Version with 45mm cannon; "heavy" model.
Yak-9M - Revised armament; cockpit position slightly moved.
Yak-9MPVO - Night-fighter Model; Klimov VK-105 PF2 engine of 1,240 horsepower; RPK-10 radio compass; searchlight.
Yak-9P - Interceptor produced in post-war years; based on Yak-9U; all-metal wing assemblies; fitted with Klimov 107A inline piston engine generating 1,650hp; 2 x 20mm ShVAK cannons.
Yak-9PD - High-Altitude Interceptor; fitted with Klimov M-105 PD engine to counter Junkers Ju 86R reconnaissance aircraft of the German Luftwaffe; later upgraded to water-injected Klimov M-106 PV engine.
Yak-9R - Reconnaissance Variant
Yak-9S - Based on Yak-9M; fitted with Klimov VK-105 PF engine; 1 x 23mm Nudelman-Suranov NS-23 cannon and 2 x 20mm Berezin B-20 cannons; new propeller system; never produced.
Yak-9T - Anti-Tank Model; fitted with 37mm or 45mm cannons.
Yak-9TD - Fitted with NS-37 cannon; 4 x 110lb FAB-50 bomb compatibility.
Yak-9TK - 20mm, 23mm, 37mm or 45mm cannon compatible; never produced.
Yak-9U - Fitted with Klimov VK-107A engine of 1,650 horsepower; 1 x 20mm ShVAK cannon; improvements throughout.
Yak-9UV - Proposed two-seat trainer; never produced; 1 x 20mm Berezin B-20 cannon.
Yak-9UT - Fitted with 1 x 37mm Nudelman N-37 cannon and 2 x 20mm Berezin B-20 cannons; production aircraft replaced N-37 with NS-23.
Yak-9V - Two-Seat Trainer; fitted with Klimov VK-105 PF2 engine; 1 x 20mm ShVAK cannon; based on Yak-9M and Yak-9T models.