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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. The wings were made larger so they could hold more fuel to increase the range.

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

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

Engine

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

Undercarriage

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

The tail wheel was retractable.

Cockpit

The cockpit provided for excellent visibility for the pilot.

Speed and Range Comparison

Speed and Range Comparison

Prototype

The Yak-9U prototype flew in early 1943. Was lost in a test flight.
The Yak-9U prototype first flew in December 1943.

Production

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

  • Yakovlev Yak-9P/U: ~3,900
  • Total: 8,721, 16,769
    • Manufacturer: State Industries

Production Comparison

Production Comparison

Variants

  • Yakovlev Yak-9:
  • Yakovlev Yak-9B: Fighter bombing. Could carry up to 880 lb / 882 lb / 400 kg of bombs. These were carried in vertical tubes behind the cockpit.
  • Yakovlev Yak-9D: Long range version. Delivered in May 1943.
  • Yakovlev Yak-9DD: Very long range. Had fuel capacity increased to 233 gallons / 880 liters.
  • Yakovlev Yak-9K: Close support and anti-tank. 45 mm cannon. Cockpit was moved back to move the center of gravity to the rear to compensate for the cannon.
  • Yakovlev Yak-9M: Added a machine gun.
  • Yakovlev Yak-9MPV0: Night fighter.
  • Yakovlev Yak-9P: All weather. Didn't become available until after World War II. Used in the Korean War.
  • Yakovlev Yak-9T: Anti-tank. Anti-shipping. Carried a 37 mm Nudelmann-Suranov cannon for anti-tank missions. Had Klimov VK-105PF inline engine (1,260 HP). Cockpit was moved back to move the center of gravity to the rear to compensate for the cannon.
  • Yakovlev Yak-9U: All metal. Became operational in late 1944. Wing moved forward. More aerodynamic.
  • Yakovlev Yak-9UV: Two seat trainer.

Usage

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

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

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

Bulgaria

A batch of Yak-9s was supplied to Bulgaria in late 1944.

Korean War

The Yak-9s saw service in the Korean War starting in June 1950.

Specifications

  Yakovlev Yak-9
Type Fighter, fighter bomber
Crew 1
Engine (Type) Klimov M-105PF-1
OR Klimov M-105PF-2
OR Klimov M-105PF-3
OR Klimov M-107A
Cylinders V 12
Cooling  
HP F-1: 1,260
F-2: 1,300
F-3: 1,360
A: 1,650
Propeller blades 3
Fuel capacity  
Dimensions  
Span  
Length  
Height  
Wing area  
Weight  
Empty  
Loaded  
Performance  
Speed @ sea level  
Climb  
Service ceiling  
Range  
Armament  
Nose 1: 20 mm
2: 12.7 mm MG
Bombs 441 lb
200 kg
  Yakovlev Yak-9D
Type Fighter
Crew 1
Engine (Type) Klimov VK-105PF-1 piston
Klimov M-105PF
Klimov M-105PF-3
Cylinders V 12
Cooling Liquid
HP 1,260
Propeller blades 3
Fuel capacity 172 gallons
650 liters
Dimensions  
Span 31' 11", 31' 11.5", 32' 10"
9.74 m
Length 27' 10", 28' 0.75", 28' 1"
8.5 m, 8.55 m
Height 8', 8' 6", 9' 10"
2.6 m, 3 m
Wing area 185 ft2
17.15 m2
Weight  
Empty 5,324 lb
2,420 kg
Loaded 6,850 lb, 6,867 lb
3,115 kg
Performance  
Speed @ sea level 330 mph, 332 mph
533 kph, 534 kph
Speed @ 10,170' /
3,100 m
374 mph
602 kph
Speed @ 11,480' 373 mph
Speed @ 12,000' /
3,650 m
370 mph
597 kph
Climb  
Climb to 16,405' /
5,000 m
6 minutes
Service ceiling 32,800', 33,000', 34,775'
10,000 m, 10,600 m
Range 808 miles, 843 miles, 870 miles
1,360 km, 1,400 km
Range - operational 824 miles
1,329 km
Armament 1: 20 mm
1: MG
Spinner 1: 20 mm ShVAK
120 rounds
Engine cowling 1: 12.7 mm MG
200 rounds
  Yakovlev Yak-9U
Type Fighter
Crew 1
Engine (Type) Klimov M.107A
VK-107A piston
Cylinders Inline
Cooling  
HP 1,650
Propeller blades  
Fuel capacity  
Dimensions  
Span 32' 0.6", 32' 9.75"
9.77 m, 10 m
Length 28' 0.6", 28' 6.5"
8.55 m, 8.7 m
Height 8'
2.44 m
Wing area 185.7 ft2
17.25 m2
Weight  
Empty 5,093 lb, 5,100 lb, 5,677 lb
2,310 kg, 2,313 kg, 2,575 kg
Loaded 6,830 lb, 6,988 lb, 6,989 lb
3,098 kg, 3,170 kg
Performance  
Speed @ sea level 367 mph, 415 mph
590 kph, 670 kph
Speed @ 16,405' /
5,000 m
435 mph
700 kph
Speed @ 17,875' 437.5 mph
Speed @ 18,700' /
5,700 m
418 mph
672 kph
Speed @ 22,640' /
6,900 m
435 mph
700 kph
Climb 4,528'/minute, 4,920'/minute
1,380 m/minute, 1,500 m/minute
Climb to 16,405' /
5,000 m
3.8 minutes
Service ceiling 35,925', 39,040'
10,950 m, 11,900 m
Range 540 miles, 609 miles, 746 miles
870 km, 980 km, 1,200 km
Armament 2: 12.7 mm UBS MG
Spinner 1: 23 mm VYa-23V
Bombs 2: 220 lb
2: 100 kg

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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