Yakovlev Yak-7a
| GENERAL DATA | |||
| Other Designation(s) | - |
||
| Type | Fighter, Trainer |
Crew | 1 |
| Manufacturer(s) | Yakovlev |
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| Production | 6399 |
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| First Flight | 23 July 1940 |
Introduction | 1942 |
| Variants | |||
| Ya-27 | two-seat prototype converted from a pre-serial I-26 | ||
| Yak-7UTI | initial two-seat communication/trainer version, 186 built in 1941 | ||
| Yak-7V | two-seat trainer; 510 built in 1942/43 + 87 converted from Yak-7B | ||
| Yak-7 | single-seat fighter version, based on the Yak-7UTI, armor + more guns added, small number built 1941/42 | ||
| Yak-7-37 | After trials in April–May 1942, a small batch of 22 Yak-7-37s was authorised, fitted with a MPSh-37 37 mm (1.457 in) cannon, mounted between the engine cylinder blocks, firing through the propeller spinner. Two 12.7 mm (0.500 in) UBS machine guns were also fitted in the forward fuselage firing above the engine | ||
| Yak-7A | improved Yak-7, about 300 built in early 1942 | ||
| Yak-7B | upgraded version of Yak-7A (reduced wingspan, simplified landing gear, better equipment), about 5000 were built. | ||
| Yak-7D | long range prototype, development basis for the Yak-7DI/Yak-9. | ||
| Yak-7K courier | VIP transport version. converted from Yak-7B, 1944. | ||
| Yak-7U Mark | |||
| Yak-7PVRD | experimental - had two DM-4 ramjet under wings, top speed: 800 km/h. Two were built. | ||
| Yak-7DI | long range fighter, redesignated Yak-9. | ||
| Yak-7 M-82 | new (M-82) engine version. tested in 1941. | ||
| Yak-7R | Jet project with one liquid fuel jet and two ramjets. 1942. | ||
| Yak-7R | jet version of Yak-7 with Jumo 004 engine. Said to have been built in Tbilisi to fly over Red Square at the parade in 1947. | ||
| Yak-7R | Yak-3 with Jumo 004 turbojet. Development started not later than 1945. First flown in 1946? | ||
| Yak-7T | two aircraft for testing engine mounted heavy cannons (NS-37 and NS-45 37 mm (1.457 in) and 45 mm (1.772 in) calibre respectively). | ||
| DIMENSIONS | |||
| Length | 8.48 m |
Empty Weight | 2450 kg |
| Wingspan | 10 m |
Loaded Weight | 2935 kg |
| Height | 2.75m |
Max takeoff weight | 3005 kg |
| Wing area | 17.15 m² |
Wing Loading | 172.6 kg/m² |
| ARMAMENT | ||||
| Main Guns | Engine mounted* |
1 × 20 mm (0.8 in) ShVAK cannon |
Ammunition Carried | 1 x 140 |
| Secondary Guns | Nose ** |
2 x 7.62 mm (0.300 in) ShKAS MG *** |
Ammunition Carried | 2 x ? |
| Other Armament | 2 x 50 kg FAB-50 bomb or 6 x RS-82
rockets or RBS-82 rockets |
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(*) firing through propeller hub, (**) synchronized in the upper nose fuselage, (***) Later variants like the Yak-7b, used 2 x 12.7mm Berezin UB guns (348 rounds).
| POWERPLANT | |||
| Engine | 1 × M-105PA |
Type & Displacement | V-12 liquid-cooled, 35.101 L |
| Horsepower (maximum) | 1050
hp |
Power/Weight Ratio | 357.75 hp / ton * |
| Fuel Capacity | ? L + 80
L additional tank (from 20 May 1942)
|
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(*) with loaded weight
| mPERFORMANCES | |||
| Maximum Speed | 571 km/h at 5000 m, 610 km/h (dive) |
Cruise Speed | 314 km/h |
| Stall Speed (takeoff/landing) * | 140 km/h |
Service Ceiling | 9500 m |
| Rate of Climb | 12 m/s |
Range | 643 km, 825 km |
(*) vitesse de décrochage (décollage/atterrissage)
| Sources | |||
| Wikipédia | aviationsmilitaires.net | ||
Drawings |
