La-5

The Lavochkin La-5 was the fighter that restored the Soviet Air Force’s confidence in the air war over the Eastern Front. Developed in a matter of months during the winter of 1941–1942, it took the wooden airframe of the disappointing LaGG-3 and fitted it with the powerful Shvetsov ASh-82 radial engine, an engine originally designed for bombers. The result was a rugged, fast, and heavily armed fighter that could meet the Messerschmitt Bf 109 on nearly equal terms at the low and medium altitudes where most fighting on the Eastern Front took place. About 9,920 La-5 fighters of all versions were built between 1942 and 1944, and the type became one of the three great Soviet fighters of the war alongside the Yakovlev Yak-9 and the later Lavochkin La-7. Its finest hours came at Stalingrad in late 1942 and at Kursk in the summer of 1943, where La-5 regiments fought the Luftwaffe to a standstill. The Soviet Union’s highest-scoring ace, Ivan Kozhedub, flew the La-5 and then the La-7, and the aircraft’s reputation for toughness and firepower made it a favourite among Soviet pilots until the end of the war.

1. Key Facts

Role	Single-seat fighter
First flight	March 1942 (LaG-5 prototype)
Introduced	1942
Number built	About 9,920 (all versions)
Crew	1
Engine	Shvetsov ASh-82FN 14-cylinder radial, 1,850 hp
Max speed	About 648 km/h (403 mph) for the La-5FN at altitude
Range	About 765 km (475 miles)
Armament	2 × 20 mm ShVAK cannon; some versions carried bombs or rockets
Operators	Soviet Union (VVS); small numbers with Czechoslovak and Polish units
Fate	Withdrawn from front-line service in the late 1940s; replaced by the La-7 and later jet fighters

2. Development

Origins in the LaGG-3

The La-5 was born from failure. Its predecessor, the Lavochkin-Gorbunov-Gudkov LaGG-3, entered service in 1941 as one of the Soviet Union’s three new-generation fighters, alongside the Yakovlev Yak-1 and the Mikoyan-Gurevich MiG-3. On paper the LaGG-3 was modern: a wooden monocoque airframe, a liquid-cooled Klimov M-105 engine, and a 20 mm cannon firing through the propeller hub. In practice it was overweight, underpowered, and unloved by its pilots, who nicknamed it the “guaranteed varnished coffin” because its wooden structure burned readily. By the winter of 1941–1942, with German armies deep inside Soviet territory and the Luftwaffe dominating the skies, the Soviet leadership demanded a better fighter, and demanded it quickly. Lavochkin’s design bureau, evacuated to Gorky, was given a simple brief: keep the LaGG-3 airframe, which factories already knew how to build, but find it a far more powerful engine.

The Radial Engine Solution

The answer was the Shvetsov ASh-82, a 14-cylinder twin-row radial engine developed from the American Wright R-1820 Cyclone and already in production for the Ilyushin Il-4 bomber and the Tupolev Tu-2. A radial engine was a bold choice for a fighter designed around a liquid-cooled inline engine, because it required a completely new, much wider nose and a redesign of the forward fuselage. Lavochkin’s engineers, led by Semyon Lavochkin himself, accepted the challenge. The prototype, initially called the LaG-5, kept the LaGG-3’s rear fuselage and wooden wings but grafted on a new forward fuselage housing the big radial, with the pilot sitting higher to see over the engine. The first prototype flew in March 1942, and test pilots immediately reported a transformation: the new fighter was faster, climbed better, and handled more easily than the LaGG-3.

First Flights and Testing

State acceptance trials began in April 1942. The LaG-5 reached 613 km/h at altitude in its first trials, a substantial improvement over the LaGG-3, and its climb rate and manoeuvrability at low altitude were judged excellent. The trials also exposed problems: the engine overheated, the cockpit was poorly ventilated and filled with exhaust fumes, and the canopy was difficult to open in an emergency. Lavochkin’s team worked through these faults in weeks rather than months, and the State Defence Committee ordered the type into production in the summer of 1942 under the designation La-5, with the first production aircraft reaching front-line regiments in September of that year.

Overcoming Early Problems

Early production La-5 fighters still suffered from quality problems that were common across Soviet wartime industry: poor surface finish, leaking fuel tanks, and engines that rarely delivered their rated power. Pilots complained about the cockpit heat and the limited rearward visibility caused by the raised fuselage spine behind the cockpit. Many of these defects were corrected progressively on the production line, and later versions introduced a cut-down rear fuselage with a clear-view canopy, improved engine cooling, and metal wing spars. The process of continuous improvement, rather than any single redesign, turned the La-5 from a promising emergency measure into a genuinely first-class fighter by 1943.

3. Design

Airframe and Structure

The La-5 was built largely of wood, a deliberate choice that reflected both Soviet industrial realities and the design philosophy of the Lavochkin bureau. The fuselage was a wooden monocoque shell made of birch veneer bonded with phenolic resin, while the wings used wooden ribs and spars with plywood skinning. Wood was plentiful in the Soviet Union, required no scarce aluminium, and could be worked by furniture factories and other civilian workshops converted to aircraft production. The wooden structure was light and strong, but it was vulnerable to fire and to rot in damp conditions, and repairs at the front often required carpentry skills rather than metalworking. The La-5’s low-set cantilever wing had a span of 9.80 metres, and the aircraft’s compact dimensions gave it a small, hard-to-hit silhouette in a dogfight.

Engine and Performance

The heart of the La-5 was the Shvetsov ASh-82 radial, a 41.2-litre, 14-cylinder engine that produced 1,700 hp in the ASh-82 version fitted to early La-5s and 1,850 hp in the direct fuel-injection ASh-82FN fitted to the La-5FN. The big radial gave the fighter outstanding performance below about 4,000 metres, exactly the altitude band where most Eastern Front air combat took place, because both Soviet and German ground-attack operations kept fighters low. At altitude the engine’s performance fell away and the La-5 lost its edge against the Bf 109, but Soviet tactics rarely required high-altitude interception. The La-5FN could reach about 648 km/h at 6,000 metres and climb to 5,000 metres in about five minutes, figures that put it on equal terms with the Bf 109G and the Focke-Wulf Fw 190A at low altitude.

Cockpit and Pilot Experience

Soviet pilots found the La-5 a demanding but rewarding aircraft. Its controls were heavy, especially the ailerons at high speed, and it required real physical strength to fly hard in combat. The cockpit was cramped, hot, and filled with engine fumes in early versions, and the gunsight and instruments were basic by Western standards. Yet pilots valued its ruggedness, its ability to absorb battle damage and keep flying, and its powerful armament. The later La-5FN introduced a cut-down rear fuselage and an all-round-vision canopy, which greatly improved the pilot’s view behind him — a vital advantage in a dogfight. Many Soviet aces preferred the Lavochkin fighters to the lighter Yakovlevs precisely because the La-5 could take punishment and still bring its pilot home.

4. Technical Specifications

The figures below are for the La-5FN, the definitive wartime version, and are typical values drawn from Soviet manuals and post-war reference works. Figures for the earlier La-5 and La-5F were lower, and individual aircraft varied because of wartime production tolerances.

	La-5FN
Length	8.67 m (28 ft 5 in)
Wingspan	9.80 m (32 ft 2 in)
Height	2.54 m (8 ft 4 in)
Wing area	17.59 sq m (189 sq ft)
Empty weight	2,605 kg (5,743 lb)
Loaded weight	3,265 kg (7,198 lb)
Max takeoff weight	3,402 kg (7,500 lb)
Engine	Shvetsov ASh-82FN radial, 1,850 hp
Max speed	648 km/h (403 mph) at 6,000 m
Range	765 km (475 miles)
Service ceiling	11,000 m (36,100 ft)
Climb rate	5,000 m in about 5 minutes

Dimensions and Weights

The La-5FN was a compact fighter, shorter and lighter than its German opponents, and its modest size was an asset in close combat. Its loaded weight of about 3,265 kg was considerably less than the Fw 190A’s, and its wing loading of roughly 186 kg per square metre gave it good turning performance at low and medium altitudes. The wooden construction kept the empty weight down, although the weight grew as stronger engines and heavier armament were fitted. Fuel capacity was about 464 litres in internal tanks, enough for roughly 765 km of range, which was adequate for the short-range tactical air war on the Eastern Front but short by Western standards. Drop tanks were rarely used, because Soviet fighters operated close to their own airfields and close to the front line.

Performance in Combat Conditions

The La-5FN’s performance peaked at low and medium altitudes, where its radial engine delivered full power and its light airframe could turn tightly. At altitudes above 6,000 metres its speed and climb fell off noticeably, and German fighters that could choose the height of an engagement held an advantage. Soviet pilots learned to fight in the vertical plane at low altitude, using the La-5’s excellent climb and acceleration to regain energy after a turn. The aircraft’s roll rate was good but not outstanding, and its heavy ailerons tired pilots in prolonged manoeuvring. Despite these limits, the La-5FN was the first Soviet fighter that German pilots respected as an equal at the altitudes where the Eastern Front air war was actually fought, and that fact alone changed the balance of the air war in 1943.

5. Armament

Cannon Armament

The standard armament of the La-5 was two 20 mm ShVAK cannons mounted in the upper nose, synchronised to fire through the propeller arc, with 170 rounds per gun. The ShVAK was a reliable, hard-hitting weapon, and two of them gave the La-5 a weight of fire roughly equal to that of the Bf 109G’s single 20 mm cannon and two machine guns. Soviet pilots valued the cannon’s destructive power against German bombers and against the armoured Ju 87 and Hs 129 ground-attack aircraft. The nose mounting concentrated the fire along the aircraft’s centreline, which made aiming simple and meant that the guns remained effective at longer ranges than wing-mounted weapons. Some La-5s were fitted experimentally with three 20 mm cannons, but the two-gun arrangement remained standard because it kept the weight down and the handling clean.

Bombs and Rockets

The La-5 could also carry a modest ground-attack load, reflecting the Soviet practice of using fighters as fighter-bombers when the tactical situation demanded it. Underwing racks could carry two bombs of up to 100 kg each, or six RS-82 unguided rockets. These loads were small compared with the dedicated Il-2 Sturmovik, but they allowed La-5 regiments to attack German columns, artillery positions, and airfields when no dedicated ground-attack aircraft were available. The rockets in particular were useful against soft targets and for harassing German transport, although their accuracy was poor. In practice, most La-5 pilots preferred to fly clean, without external stores, because the drag and weight of bombs and rockets reduced the speed and agility that were the fighter’s main assets in air combat.

6. Variants

La-5 and La-5F

The first production version, the La-5, was built from late 1942 with the ASh-82 engine of 1,700 hp and the original high rear fuselage with limited rearward visibility. About 1,000 La-5s were built before production shifted to the improved La-5F in early 1943. The La-5F introduced the ASh-82F engine with improved cooling and reliability, and it also featured a cut-down rear fuselage with a new canopy that gave the pilot a much better view to the rear. This change, inspired by the same modification on the Yak-1B, was one of the most popular improvements among pilots. About 4,700 La-5 and La-5F fighters were built in total, and both versions fought at Stalingrad and Kursk.

La-5FN and Later Versions

The La-5FN, which entered production in March 1943, was the definitive version and the one most Soviet pilots remember. Its ASh-82FN engine used direct fuel injection, raising power to 1,850 hp and improving performance at all altitudes, especially in the climb. The La-5FN also received a further refined canopy, improved radio equipment, and metal wing spars that replaced the wooden spars of earlier versions. About 4,900 La-5FNs were built, and the type remained in front-line service until the end of the war. The La-5FN was the direct ancestor of the La-7, which used the same engine in a lighter, aerodynamically cleaned-up airframe. A small number of two-seat La-5UTI trainers were also built for conversion training, and one La-5 was experimentally fitted with a ramjet, but neither of these entered series production.

7. Combat Record

Stalingrad and Kursk

The La-5 entered combat in the autumn of 1942, just as the Battle of Stalingrad reached its climax. The first regiments to receive the type flew it in the desperate air fighting over the Volga, where Soviet pilots were still outnumbered and outclassed by the Luftwaffe’s experienced fighter pilots. Even so, the La-5’s arrival was noticed: for the first time, Soviet pilots had a fighter that could catch a Bf 109 in level flight and out-turn it at low altitude. At Kursk in July 1943, La-5 regiments flew hundreds of sorties a day in support of the Soviet counter-offensive, fighting huge air battles over the battlefield. The Luftwaffe lost more aircraft at Kursk than in any previous campaign on the Eastern Front, and the La-5, together with the Yak-9, was at the centre of that achievement. By the end of 1943, the Luftwaffe had lost air superiority over the Eastern Front, and it never regained it.

The Battle of Kursk in the Air

The air battle over Kursk in July 1943 was one of the largest air battles in history, with thousands of aircraft engaged on both sides. La-5 units flew escort missions for Il-2 ground-attack formations, free-hunting sweeps over German airfields, and direct combat against German fighter escorts. Soviet pilots learned to fight in coordinated pairs and groups, using the La-5’s low-altitude performance to ambush German formations from below. Losses were heavy on both sides, but the Soviet Union could replace its pilots and aircraft far more easily than Germany could, and the Luftwaffe’s fighter force was ground down by attrition. The La-5’s contribution at Kursk was not just measured in aircraft shot down; it was measured in the fact that Soviet ground-attack aircraft could now operate over the battlefield with effective fighter cover.

Aces and Reputation

The La-5 became the mount of many of the Soviet Union’s leading aces. Ivan Kozhedub, the highest-scoring Allied ace of the war with 62 confirmed victories, flew the La-5 and later the La-5FN before converting to the La-7, in which he scored most of his victories. His success in the Lavochkin fighters made the type famous throughout the Soviet Union, and Kozhedub’s name became closely associated with the La-5 in Soviet propaganda and post-war memory. Other aces, including Kirill Yevstigneyev and Alexander Koldunov, also scored heavily in Lavochkin fighters. The La-5’s reputation among Soviet pilots was that of a tough, honest fighter: it would not forgive a careless pilot, but it would bring a skilled one home. German pilots, for their part, learned to respect the Lavochkin fighters, and German intelligence reports from 1943 onwards warned that the La-5FN was a dangerous opponent at low altitude.

8. Operators

Soviet Service

The overwhelming majority of La-5 fighters served with the Soviet Air Force, the VVS, on the Eastern Front. The type equipped dozens of fighter regiments, and by 1944 La-5 and La-5FN regiments were flying in every major Soviet offensive, from Operation Bagration in Belorussia to the advance into Poland and Germany. The La-5 also served with Soviet naval aviation, flying from airfields around Leningrad and the Black Sea, and with air defence units protecting Soviet cities. Soviet industry built the La-5 in enormous numbers at Gorky, and the type’s wooden construction allowed production to continue even when aluminium supplies were short. The La-5 remained in front-line service until the end of the war in Europe, and it was gradually replaced by the La-7 and then by jet fighters in the late 1940s.

Other Users and Post-War Service

Small numbers of La-5 fighters were supplied to the air forces of the Soviet Union’s allies. Czechoslovak squadrons flying with the Soviet Air Force operated the La-5, and Polish units formed in the Soviet Union also flew the type in the final months of the war. After the war, a handful of La-5s were transferred to the air forces of Czechoslovakia and Poland, where they served briefly as trainers and second-line fighters before being retired. No La-5 served with a Western air force, and the type was never exported in large numbers. Its post-war career was short, because the Soviet Union moved rapidly to jet fighters after 1945, and the wooden Lavochkin fighters were withdrawn and scrapped. Today only a small number of La-5 airframes survive, most of them in museums in Russia.

9. Legacy

Assessment

The La-5’s historical importance lies in what it represented: proof that Soviet industry could design and build a fighter equal to the best Germany had to offer, and do so under the extreme pressure of total war. The decision to fit a bomber radial engine to a fighter airframe was an improvisation, but it was an improvisation that worked, and it showed the flexibility of the Soviet design system. The La-5 was not the most elegant fighter of the war, nor the fastest, nor the best armed. Its true achievement was that it arrived at the right time, in large numbers, and at the altitudes where the war was fought. It helped break the Luftwaffe’s dominance over the Eastern Front, and it paved the way for the La-7, one of the finest piston-engine fighters of the war. Historians generally rank the La-5FN as the equal of the Bf 109G and the Fw 190A at low altitude, and as the fighter that turned the air war in the Soviet Union’s favour.

Survivors and Memory

Very few original La-5 fighters survive today, because the wooden airframes deteriorated quickly and most were scrapped after the war. The Central Air Force Museum at Monino, near Moscow, preserves an La-5FN, and there are examples and replicas in other Russian museums. The type is remembered in Russia as one of the great wartime fighters, and it appears frequently in films, model kits, and flight simulation games. For Western readers, the La-5 is less well known than the Spitfire or the Mustang, but its role in the air war on the Eastern Front was comparable in importance. Without the La-5, the Soviet Air Force would have faced the Luftwaffe in 1943 with fighters that were clearly inferior; with it, the Soviet Union could contest the skies over every battlefield from Kursk to Berlin.

10. FAQ

What does La-5 stand for?

La-5 stands for Lavochkin, the design bureau led by Semyon Lavochkin, one of the Soviet Union’s leading aircraft designers. The number 5 was the next designation in the bureau’s sequence after the LaGG-3, which had been designed jointly by Lavochkin, Gorbunov, and Gudkov. The improved versions carried suffixes that described their engines: the La-5F used the boosted ASh-82F engine, and the La-5FN used the ASh-82FN with direct fuel injection. The full name is therefore Lavochkin La-5, and the type is often grouped with its successor, the La-7, as the Lavochkin fighters.

How many La-5 fighters were built?

About 9,920 La-5 fighters of all versions were built between 1942 and 1944, a production total that made the type one of the most numerous Soviet fighters of the war. Roughly half of that total were the definitive La-5FN, with the remainder split between the early La-5 and the improved La-5F. Production was centred on the Gorky aircraft factory, which had built the LaGG-3 before it, and the type remained in production until the improved La-7 replaced it on the production lines in 1944.

Was the La-5 better than the Messerschmitt Bf 109?

At low and medium altitudes, where most Eastern Front air combat took place, the La-5FN was roughly equal to the Messerschmitt Bf 109G, and many Soviet pilots considered it superior below about 4,000 metres. The German fighter was faster and better at high altitude, where its supercharged engine gave it an advantage, but the La-5FN could out-turn and out-climb it at low altitude. German pilots learned to respect the Lavochkin fighters, and German intelligence reports from 1943 onwards warned that the La-5FN was a dangerous opponent. In practice, the outcome of a dogfight usually depended on the pilot rather than the aircraft.

Who was the most famous La-5 pilot?

Ivan Kozhedub, the highest-scoring Allied ace of the Second World War with 62 confirmed victories, flew the La-5 and the La-5FN before converting to the La-7, in which he scored most of his victories. Kozhedub was awarded the title Hero of the Soviet Union three times, a distinction shared by only two other men. His success in the Lavochkin fighters made the type famous throughout the Soviet Union, and his name became closely associated with the La-5 in Soviet propaganda and post-war memory. Other leading aces, including Kirill Yevstigneyev, also scored heavily in Lavochkin fighters.

Why was the La-5 made of wood?

The Soviet Union used wood because it was plentiful and did not require scarce aluminium, and because furniture factories and other civilian workshops could be converted to build wooden aircraft parts. The La-5’s fuselage was a wooden monocoque shell made of birch veneer bonded with resin, a structure that was light, strong, and easy to repair with carpentry tools. The wooden construction had drawbacks: it was vulnerable to fire and to rot in damp conditions, and it required careful storage. But it allowed Soviet industry to build fighters in enormous numbers even when aluminium supplies were short.

What replaced the La-5?

The La-5 was replaced in production and in front-line service by the Lavochkin La-7, which used the same ASh-82FN engine in a lighter, aerodynamically refined airframe. The La-7 entered service in 1944 and was faster than the La-5FN, climbing better and handling more easily, with a top speed of about 680 km/h. It became one of the best piston-engine fighters of the war and the mount of Ivan Kozhedub for most of his victories. The La-5FN remained in front-line service until the end of the war, and both types were gradually replaced by jet fighters in the late 1940s.

11. Sources

• Lavochkin La-5 and La-7, general histories of the Lavochkin fighter family and Soviet wartime aviation.
• Soviet Air Force records and production figures for the La-5 series, as summarised in standard reference works on Soviet aircraft of the Second World War.
• Gordon, Yefim and Khazanov, Dmitri, Soviet Combat Aircraft of the Second World War, Volume One: Single-Engined Fighters.
• Bergstrom, Christer, works on the air war on the Eastern Front, including the battles of Stalingrad and Kursk.
• Hardesty, Von, Red Phoenix: The Rise of Soviet Air Power, 1941–1945.
• Wikipedia, “Lavochkin La-5”, consulted for production figures and technical data, cross-checked against specialist sources.