Yak-1

The Yak-1 was the Soviet Union’s first modern monoplane fighter, a small, light, and agile aircraft designed by Alexander Yakovlev, which entered service in 1941 and became one of the main fighters of the Red Air Force. With about 8,700 built, the Yak-1 fought in the defence of Moscow, at Stalingrad, and at Kursk, and it was flown by some of the Soviet Union’s most famous aces, including Lydia Litvyak, the highest-scoring female fighter pilot in history.

1. Key Facts

Field	Value
Type	Single-seat fighter
Country	Soviet Union
Service period	1941–1945 (front-line); training to 1950s
Production	About 8,700 built
Length	8.48 metres (27.8 feet)
Wingspan	10.0 metres (32.8 feet)
Height	2.64 metres (8.7 feet)
Crew	1 pilot
Engine	Klimov M-105PA/PF V-12, 1,050–1,180 horsepower
Speed	592 km/h (368 mph) at 4,800 metres
Range	About 700 km (435 miles)
Service ceiling	10,000 metres (32,800 feet)
Main armament	1 × 20 mm ShVAK cannon; 2 × 7.62 mm ShKAS machine guns
Bomb load	Up to 200 kg of bombs (some versions)
Main theatres	Eastern Front; Moscow; Stalingrad; Kursk; Kuban

2. Development and Design

Yakovlev and the I-26 Prototype

The Yak-1 began as the I-26, a prototype fighter designed by Alexander Yakovlev, who was a young and ambitious designer, and who had been asked by the Soviet government to produce a modern fighter to replace the obsolete Polikarpov I-16. The I-26 first flew in January 1940, and it was a small, light aircraft, with a wooden wing, a mixed wood and metal fuselage, and a Klimov M-105 engine, which gave it a top speed of 592 kilometres per hour. The prototype suffered from teething problems, including engine overheating and structural weaknesses, but it showed promise, and it was ordered into production as the Yak-1 in 1940, with the first aircraft delivered to fighter regiments in early 1941.

A Fighter Built of Wood

The Yak-1 was built largely of wood, with a plywood-covered wooden wing and a fuselage made of steel tubes covered with plywood and fabric, a construction method that was dictated by the shortage of aluminium in the Soviet Union, and that made the aircraft light and easy to build. The wooden construction also made the aircraft vulnerable to damage, and it required careful maintenance, but it allowed Soviet factories, many of which had no experience with metal aircraft, to build the Yak-1 in large numbers. The aircraft was small and light, with a weight of only 2,900 kilograms loaded, and it was agile and responsive, with light controls that made it popular with its pilots.

Production and the Evacuation

Production of the Yak-1 began at Factory No. 292 at Saratov, and it was later moved to other factories, including those at Novosibirsk and at Omsk, as the German advance forced the evacuation of Soviet industry to the east. The Yak-1 was produced in large numbers, with about 8,700 built between 1941 and 1944, and it was the main Soviet fighter in 1941 and 1942, before it was supplemented by the Yak-7 and the Yak-9, which were developed from the Yak-1. The production of the Yak-1 was a remarkable achievement, for it was carried out under the most difficult conditions, with factories working around the clock and with workers who had never built an aircraft before.

3. Technical Specifications

The Klimov M-105 Engine

The Yak-1 was powered by a Klimov M-105PA or M-105PF twelve-cylinder liquid-cooled V engine, producing 1,050 to 1,180 horsepower, which drove a three-bladed propeller and gave the aircraft a top speed of 592 kilometres per hour at 4,800 metres. The M-105 was a development of the French Hispano-Suiza engine, and it was reliable and powerful, although it suffered from overheating in the early Yak-1s, a problem that was solved by improving the cooling system. The engine gave the Yak-1 a good rate of climb and a good service ceiling, and it allowed the aircraft to compete with German fighters such as the Bf 109E and the early Fw 190.

The 20 mm Cannon and Machine Guns

The Yak-1 was armed with a 20 mm ShVAK cannon firing through the propeller hub, with 120 rounds, and two 7.62 mm ShKAS machine guns in the nose, with 750 rounds per gun, which gave the aircraft a good punch against German fighters and bombers. The cannon was accurate and hard-hitting, and it could destroy a German fighter with a short burst, although the ammunition supply was limited and the pilot had to aim carefully. Some Yak-1s were also fitted with racks for bombs or rockets, and they were used for ground attack, although the Yak-1 was primarily a fighter, and it was most effective in air-to-air combat.

Performance and Handling

The Yak-1 was an agile aircraft, with a tight turning circle and a good rate of roll, and it could out-turn the Bf 109 at low altitude, which was a significant advantage in the dogfights of the Eastern Front. The aircraft was also stable and easy to fly, with light controls and no vicious habits, and it was popular with Soviet pilots, who appreciated its handling and its responsiveness. The Yak-1 was, however, slower than the Bf 109F at high altitude, and it had a shorter range, which limited its usefulness as an escort fighter, but at low and medium altitudes, where most Eastern Front air combat took place, it was a match for any German fighter.

4. Combat Service

The Defence of Moscow

The Yak-1 first saw combat in the autumn of 1941, during the German advance on Moscow, where it was used to defend the capital against German bombers and fighters, and where its pilots, many of whom were inexperienced, fought bravely against superior German forces. The Yak-1 was outnumbered and outmatched in the early months of the war, but it held its own, and it shot down a number of German aircraft, including Heinkel He 111 bombers and Bf 109 fighters. The defence of Moscow was a turning point in the war, and the Yak-1 played a part in it, providing air cover for the Soviet counteroffensive that drove the Germans back from the capital.

Stalingrad, Kursk, and the Kuban

The Yak-1 served at Stalingrad in 1942 and 1943, where it fought in the air battles over the city and over the Volga, and where it was flown by famous aces, including Lydia Litvyak, who shot down twelve German aircraft in a Yak-1 before she was killed in August 1943. The Yak-1 also served at Kursk in July 1943, in the largest tank battle in history, where Soviet fighters, including Yak-1s, fought for air superiority over the battlefield, and in the Kuban in 1943, where the air battles were among the fiercest of the war. The Yak-1 was gradually replaced by the Yak-9, which was faster and better armed, but it continued to serve in front-line units until 1944, and in training units until the end of the war.

The Aces of the Yak-1

The Yak-1 was flown by many Soviet aces, including Lydia Litvyak, who was the highest-scoring female fighter pilot in history, with twelve solo victories, and who flew a Yak-1 with the 73rd Guards Fighter Regiment. Other Yak-1 aces included Yekaterina Budanova, who scored eleven victories, and Nikolai Baranov, who scored twenty-four victories in a Yak-1. The Yak-1 was a fighter that rewarded skill and aggression, and its pilots, many of whom were young and inexperienced, learned to fly it well and to use its agility to defeat German fighters.

5. Variants

The Yak-1 and Its Derivatives

The Yak-1 was produced in several versions, with the main production model being the Yak-1 with the M-105PA engine, and later versions with the more powerful M-105PF engine, which gave better performance at low altitude. There was also a Yak-1b, with a cut-down rear fuselage and a bubble canopy, which gave the pilot a better view to the rear, and which was introduced in 1942. The Yak-1b was the most numerous version, with about 2,500 built, and it was the version flown by Litvyak and by other aces.

The Yak-7 and Yak-9

The Yak-1 was the basis for the Yak-7, which was originally designed as a trainer but which was developed into a fighter, and for the Yak-9, which was the most numerous Soviet fighter of the war, with more than 16,000 built. The Yak-7 and Yak-9 shared the Yak-1’s basic design, with a wooden wing, a mixed fuselage, and a Klimov engine, but they were larger, faster, and better armed, and they served for the rest of the war. The Yak-1 is therefore remembered as the ancestor of the Yak fighter family, which was one of the most successful fighter families of the Second World War.

The Yak-1 in Foreign Service

The Yak-1 was also used by the Polish and Czechoslovak Air Forces, which fought alongside the Red Army, and by the French Normandie-Niemen Regiment, which flew Yak-1s and later Yak-9s on the Eastern Front. The Yak-1 was exported to several countries after the war, including Yugoslavia and Albania, where it served as a trainer and as a fighter into the 1950s. The French Normandie-Niemen Regiment flew Yak-1s on the Eastern Front in 1943, scoring its first victories in the type before converting to the Yak-9, and Polish and Czechoslovak squadrons also flew the Yak-1 alongside Soviet units, a sign of the trust placed in the little wooden fighter.

6. Strengths

Agility and Handling

The great strength of the Yak-1 was its agility, for it could out-turn the Bf 109 at low altitude, and its light controls and responsive handling made it a joy to fly. The aircraft was also small and difficult to hit, with a low profile and a compact fuselage, and it was well suited to the low-altitude dogfights of the Eastern Front, where most air combat took place below 4,000 metres. The Yak-1 was a pilot’s aircraft, and its pilots loved it, even when they knew it was not the fastest or the best-armed fighter.

Simplicity and Ease of Production

The Yak-1 was simple and easy to build, with a wooden structure that could be assembled by workers who had never built an aircraft, and it could be produced in large numbers, even under the difficult conditions of the evacuation. The aircraft was also easy to maintain, with a reliable engine and a simple airframe, and it could be repaired in the field with basic tools. This simplicity was vital in 1941, when the Soviet Union needed fighters quickly and could not wait for more complex designs.

The 20 mm Cannon

The Yak-1’s 20 mm cannon was a powerful weapon, and it could destroy a German fighter with a short burst, which gave the aircraft a good punch in air-to-air combat. The cannon was mounted in the nose, firing through the propeller hub, which gave it good accuracy, and it was supplemented by two machine guns, which provided additional firepower. The Yak-1 was a well-armed fighter for its time, and its armament was effective against both fighters and bombers.

7. Weaknesses

Wooden Construction and Vulnerability

The main weakness of the Yak-1 was its wooden construction, which made it vulnerable to damage and to fire, and which required careful maintenance to prevent the wood from deteriorating in damp conditions. The aircraft’s plywood skin could be damaged by a few hits, and the wooden wing was less strong than a metal wing, which limited the aircraft’s diving speed and its ability to withstand high g-forces. The Yak-1 was also vulnerable to the cannon fire of German fighters, which could destroy it with a short burst.

Short Range and Limited Armament

The Yak-1 had a short range, with only about 700 kilometres, which limited its usefulness as an escort fighter, and its armament, although effective, was limited by the small ammunition supply, with only 120 rounds for the cannon. The aircraft also lacked armour protection for the pilot in its early versions, although later aircraft were fitted with an armoured seat and with a bulletproof windscreen. The Yak-1 was a light fighter, designed for short-range interception, and it was not suited to long-range operations.

Engine Problems and Quality Control

The early Yak-1s suffered from engine overheating and from poor quality control, with aircraft delivered with defects that had to be fixed in the field, and with engines that failed in flight. These problems were gradually solved, but they affected the aircraft’s reputation in its early service, and they contributed to the losses suffered by Soviet fighter units in 1941. The Yak-1 was a good design, but it was rushed into production before it was ready, and it took time to mature.

8. Comparison with Rivals

Against the Messerschmitt Bf 109

Against the Bf 109E and Bf 109F, the Yak-1 was comparable in speed and in manoeuvrability at low altitude, although the German fighter was faster at high altitude and had a better rate of climb. The Yak-1 could out-turn the Bf 109 at low altitude, and its pilots used this advantage to get on the tail of German fighters and to stay there. The Bf 109 had a more powerful engine and a heavier armament, with a 20 mm cannon and two machine guns, but the Yak-1 was a match for it in a dogfight, and Soviet pilots learned to fight the Bf 109 on equal terms.

Against the Focke-Wulf Fw 190

Against the Fw 190, which entered service in 1941, the Yak-1 was outmatched in speed, in firepower, and in protection, for the German fighter was faster, better armed, and better armoured. The Yak-1 could not compete with the Fw 190 in a head-on attack, and its pilots learned to avoid the German fighter when possible, or to attack it from the rear, where it was vulnerable. The Fw 190 was a superior aircraft, and it forced the Soviet Union to develop the Yak-9, which was faster and better armed than the Yak-1.

Against the Hawker Hurricane and Supermarine Spitfire

Against the Hurricane, which the Soviet Union received through Lend-Lease, the Yak-1 was faster and more agile, although the Hurricane was better armed and better protected. Against the Spitfire, which was also supplied to the Soviet Union, the Yak-1 was slower and less well armed, but it was more manoeuvrable at low altitude. The Yak-1 was a good fighter, but it was not the best fighter of the war, and it was eventually replaced by the Yak-9 and the Lavochkin La-5, which were faster and more capable.

9. Legacy

The First Modern Soviet Fighter

The legacy of the Yak-1 is its status as the first modern Soviet fighter, a small, light, and agile aircraft that was designed and built in the Soviet Union, and that became the main fighter of the Red Air Force in the darkest months of the war. The Yak-1 is remembered as the ancestor of the Yak fighter family, which included the Yak-7, the Yak-9, and the Yak-3, and which was one of the most successful fighter families of the Second World War.

A Symbol of Soviet Aviation

The Yak-1 is also remembered as a symbol of Soviet aviation, and of the skill of Alexander Yakovlev, who designed the aircraft and who went on to design many more fighters, including the Yak-3, which was one of the best fighters of the war. The Yak-1 is preserved in museums in Russia and in other countries, where visitors can see the small, wooden fighter that once defended Moscow and Stalingrad, and it is remembered by historians as a remarkable achievement, a fighter built of wood, in the midst of a war, that held its own against the best fighters of the Luftwaffe.

Remembering the Yak-1 Pilots

The pilots of the Yak-1 are remembered for their skill and their courage, and for the battles they fought in the defence of Moscow, at Stalingrad, and at Kursk, where they faced superior German forces and fought on. The Yak-1 pilots, including Lydia Litvyak and Yekaterina Budanova, who were among the first women to fly fighters in combat, deserve to be remembered alongside the aces of the RAF and the Luftwaffe, for they too fought in the air war, and they too paid the price.

Frequently Asked Questions

How many Yak-1 fighters were built?
About 8,700 Yak-1 fighters were built between 1941 and 1944, making it one of the most numerous Soviet fighters of the Second World War.

Who designed the Yak-1?
The Yak-1 was designed by Alexander Yakovlev, a Soviet aircraft designer, and it was based on his I-26 prototype, which first flew in January 1940.

What was the top speed of the Yak-1?
The Yak-1 had a top speed of 592 km/h (368 mph) at 4,800 metres, with a range of about 700 km and a service ceiling of 10,000 metres.

What armament did the Yak-1 carry?
The Yak-1 carried a 20 mm ShVAK cannon firing through the propeller hub, plus two 7.62 mm ShKAS machine guns in the nose.

Who was Lydia Litvyak?
Lydia Litvyak was a Soviet fighter pilot who flew the Yak-1 with the 73rd Guards Fighter Regiment, scoring twelve solo victories, making her the highest-scoring female fighter pilot in history, before she was killed in August 1943.

What replaced the Yak-1?
The Yak-1 was replaced by the Yak-7 and the Yak-9, which were developed from the Yak-1 and which were faster, better armed, and more capable, with more than 16,000 Yak-9s built.

Sources

• Yefim Gordon and Dmitri Khazanov, Soviet Combat Aircraft of the Second World War, Volume 1: Single-Engined Fighters (1998)
• Bill Gunston, Aircraft of the Soviet Union (1983)
• The Central Air Force Museum, Monino, Yak-1 collection
• Dmitriy Khazanov, Yakovlev Fighters of World War Two (2012)
• The Imperial War Museum, Eastern Front air war collection