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Soviet Union's Yakovlev Yak-9 fighter

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Yakovlev Yak-9 fighter:
Soviet Union's Yakovlev Yak-9 fighter
Yakovlev Yak-9 fighter:
Soviet Union's Yakovlev Yak-9 fighter

Design

The Yakovlev Yak-9 was based on the Yak-7B.5 The wings were made larger so they could hold more fuel to increase the range.5

The Yakovlev Yak-9 had a welded steel fuselage with wooden wings.1

By 1944 the Yak-9 outnumbered all other Soviet fighters combined.1

Engine

A larger oil cooler scoop was installed in the nose to facilitate to cooling of the larger oil tank.1

Undercarriage

The Yak-9 had a wide undercarriage which facilitated its use from rough front line fields.1

The tail wheel was retractable.1

Cockpit

The cockpit provided for excellent visibility for the pilot.1

Speed and Range Comparison

Speed and Range Comparison

Prototype

The Yak-9U prototype flew in early 1943.1 Was lost in a test flight.1
The Yak-9U prototype first flew in December 1943.4

Production

One factory was able to produce 20 Yak-9s a day.1

  • Yakovlev Yak-9P/U: ~3,9004
  • Total: 8,7212, 16,7694
    • Manufacturer: State Industries5

Production Comparison

Production Comparison

Variants

  • Yakovlev Yak-9:
  • Yakovlev Yak-9B: Fighter bombing.2,3,4 Could carry up to 880 lb5 / 882 lb / 400 kg of bombs.2 These were carried in vertical tubes behind the cockpit.4
  • Yakovlev Yak-9D: Long range version.1,2,3,4 Delivered in May 1943.4
  • Yakovlev Yak-9DD: Very long range.2,3,4 Had fuel capacity increased to 233 gallons / 880 liters.1
  • Yakovlev Yak-9K: Close support and anti-tank.4 45 mm cannon.4 Cockpit was moved back to move the center of gravity to the rear to compensate for the cannon.4
  • Yakovlev Yak-9M: Added a machine gun.5
  • Yakovlev Yak-9MPV0: Night fighter.4
  • Yakovlev Yak-9P: All weather.1 Didn't become available until after World War II.1 Used in the Korean War.5
  • Yakovlev Yak-9T: Anti-tank.2,3 Anti-shipping.4 Carried a 37 mm Nudelmann-Suranov5 cannon for anti-tank missions.1,2 Had Klimov VK-105PF inline engine (1,260 HP).2,3 Cockpit was moved back to move the center of gravity to the rear to compensate for the cannon.4
  • Yakovlev Yak-9U: All metal.1,5 Became operational in late 1944.1 Wing moved forward.4 More aerodynamic.5
  • Yakovlev Yak-9UV: Two seat trainer.4

Usage

Yak-9s were used by pilots from France, Poland, and the Soviet Union.4,5

German units were under orders to avoid the Yak-9 in a dogfight whenever possible.1

The Yak-9 became operational in August 1942.5 Units started to receive the Yak-9 in August 1942 which made it available for the Battle of Stalingrad.1,4

Bulgaria

A batch of Yak-9s was supplied to Bulgaria in late 1944.1

Korean War

The Yak-9s saw service in the Korean War starting in June 1950.4

Specifications

  Yakovlev Yak-94
Type Fighter4, fighter bomber4
Crew 14
Engine (Type) Klimov M-105PF-14
OR Klimov M-105PF-24
OR Klimov M-105PF-34
OR Klimov M-107A4
Cylinders V 124
Cooling  
HP F-1: 1,2604
F-2: 1,3004
F-3: 1,3604
A: 1,6504
Propeller blades 34
Fuel capacity  
Dimensions  
Span  
Length  
Height  
Wing area  
Weight  
Empty  
Loaded  
Performance  
Speed @ sea level  
Climb  
Service ceiling  
Range  
Armament  
Nose 1: 20 mm4
2: 12.7 mm MG4
Bombs 441 lb4
200 kg4
  Yakovlev Yak-9D1,4,5
Type Fighter1,5
Crew 11,5
Engine (Type) Klimov VK-105PF-1 piston1
Klimov M-105PF5
Klimov M-105PF-34
Cylinders V 125
Cooling Liquid1,5
HP 1,2601,5
Propeller blades 31
Fuel capacity 172 gallons1
650 liters1
Dimensions  
Span 31' 11"1, 31' 11.5"4, 32' 10"5
9.74 m1,4
Length 27' 10"1, 28' 0.75"4, 28' 1"5
8.5 m1, 8.55 m4
Height 8'5, 8' 6"1, 9' 10"4
2.6 m1, 3 m4
Wing area 185 ft2 1
17.15 m2 1
Weight  
Empty 5,324 lb1
2,420 kg1
Loaded 6,850 lb1, 6,867 lb5
3,115 kg1
Performance  
Speed @ sea level 330 mph1, 332 mph4
533 kph1, 534 kph4
Speed @ 10,170' /
3,100 m
374 mph4
602 kph4
Speed @ 11,480' 373 mph5
Speed @ 12,000' /
3,650 m
370 mph1
597 kph1
Climb  
Climb to 16,405' /
5,000 m
6 minutes4
Service ceiling 32,800'5, 33,000'1, 34,775'4
10,000 m1, 10,600 m4
Range 808 miles5, 843 miles1, 870 miles4
1,360 km1, 1,400 km4
Range - operational 824 miles1
1,329 km1
Armament 1: 20 mm5
1: MG5
Spinner 1: 20 mm ShVAK1
120 rounds1
Engine cowling 1: 12.7 mm MG1
200 rounds1
  Yakovlev Yak-9U2,3,4,5
Type Fighter2,3
Crew 12,3
Engine (Type) Klimov M.107A5
VK-107A piston1,2,3
Cylinders Inline2
Cooling  
HP 1,6501,2,3
Propeller blades  
Fuel capacity  
Dimensions  
Span 32' 0.6"3, 32' 9.75"2
9.77 m3, 10 m2
Length 28' 0.6"3, 28' 6.5"2
8.55 m3, 8.7 m2
Height 8'2,3
2.44 m2,3
Wing area 185.7 ft2 3
17.25 m2 3
Weight  
Empty 5,093 lb2, 5,100 lb4, 5,677 lb3
2,310 kg2, 2,313 kg4, 2,575 kg3
Loaded 6,830 lb3, 6,988 lb4, 6,989 lb2
3,098 kg3, 3,170 kg2,4
Performance  
Speed @ sea level 367 mph4, 415 mph2
590 kph4, 670 kph2
Speed @ 16,405' /
5,000 m
435 mph3
700 kph3
Speed @ 17,875' 437.5 mph5
Speed @ 18,700' /
5,700 m
418 mph4
672 kph4
Speed @ 22,640' /
6,900 m
435 mph2
700 kph2
Climb 4,528'/minute4, 4,920'/minute2
1,380 m/minute4, 1,500 m/minute2
Climb to 16,405' /
5,000 m
3.8 minutes3
Service ceiling 35,925'2, 39,040'3
10,950 m2, 11,900 m3
Range 540 miles3, 609 miles2, 746 miles4
870 km3, 980 km2, 1,200 km4
Armament 2: 12.7 mm UBS MG2,3
Spinner 1: 23 mm VYa-23V2,3
Bombs 2: 220 lb2,3
2: 100 kg2,3

Sources:

  1. Aircraft of WWII, General Editor: Jim Winchester, 2004
  2. Fighting Aircraft of World War II, Editor: Karen Leverington, 1995
  3. The Encyclopedia of Weapons of World War II, General Editor Chris Bishop, 1998
  4. Aircraft of WWII, Stewart Wilson, 1998
  5. World War II Airplanes Volume 2, Enzo Angelucci, Paolo Matricardi, 1976
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