The long-range carrier fighter that dominated the early Pacific War. Designed by Jiro Horikoshi around extreme weight-saving, it combined very long range, a tight turning radius and heavy cannon armament, making it the most capable carrier fighter in the world when it appeared in 1940. Developed by Mitsubishi Heavy Industries.
The long-range carrier fighter that dominated the early Pacific War. Developed by Mitsubishi Heavy Industries.
Photo: Greg Goebel, CC BY-SA 2.0, via Wikimedia CommonsSee Specifications for full detail.
The Mitsubishi A6M Zero is a Japanese single-engine, carrier-based fighter built by Mitsubishi and designed by Jiro Horikoshi. Its long range and manoeuvrability came from an aggressive weight-saving design that omitted armour and self-sealing fuel tanks.[1]
It dominated Allied fighters for the first year of the Pacific War, prompting Allied pilots to be ordered never to dogfight one. Once Allied tactics adapted to exploit its lack of protection, its advantage eroded and Japan had no adequate successor ready.[1]
The 1937 Imperial Navy specification read like a dare: a carrier fighter faster than 500 km/h, more manoeuvrable than the beloved A5M it replaced, with two cannon and drop-tank range beyond anything flying. Nakajima studied it and declined as impossible. Mitsubishi's 34-year-old Jiro Horikoshi[2] accepted - on the condition that every gram be negotiable.[1]
His answer flew on 1 April 1939: a fighter weighing barely 1,700 kg empty, built from Sumitomo's brand-new 'extra super duralumin' alloy, with flush rivets, a bubble-style canopy years ahead of Western practice, and no armour of any kind. The Navy typed it A6M - and because it entered service in the imperial year 2600, it became the Type 0 carrier fighter: the Zero.[1]
The Zero's magic numbers came from subtraction. With under 1,000 hp it achieved what 1,500-hp Western fighters couldn't, because it carried nothing it could survive without: wing spars lightened to their limits, no pilot armour, unprotected fuel. Full-span attention to weight yielded a wing loading so low the Zero could turn inside anything - and a ferry range near 1,900 miles that let it appear where no single-engined fighter had business being.[1]
The same lightness that made the Zero dangerous early in the war made it vulnerable later on. Unprotected tanks meant it could burn after a single hit, the lack of armour meant every hit counted, and its light structure set a dive-speed ceiling Allied fighters learned to exploit by simply diving away. The design had no growth margin left either - more engine, guns or protection would have broken the weight arithmetic that made it work.[1]
Over China from 1940 the Zero was untouchable - one early engagement saw Zeros destroy an entire opposing formation without loss - and from Pearl Harbor through mid-1942 it swept the Pacific: Allied fighter forces in the Philippines, Malaya and the Dutch East Indies were shredded by pilots of the elite prewar carrier corps flying an aircraft nothing could match on its own terms.[1]
The turn came fast. Midway killed carriers and, worse, irreplaceable airmen; Allied pilots adopted energy tactics and the paired 'Thach Weave'; and new American fighters - the F6F Hellcat above all, designed with Akutan Zero data on the table[3] - arrived in overwhelming numbers. By the Marianas battles of 1944, outclassed Zeros flown by hastily trained replacements fell in the hundreds.[1]
The end was the darkest chapter: from Leyte Gulf in October 1944, Zeros became the primary aircraft of the kamikaze campaign - the fighter that had defined Japanese air power converted into a guided weapon, expended along with the last of its pilots.[1]
Japan built more Zeros than any of its other aircraft - some 10,900 by Mitsubishi and Nakajima - but never solved its dilemma: successive A6M3/A6M5 variants clipped wings for speed and thickened skins for diving, trading away the agility that was the type's whole argument, while true successors (the A7M among them) died in development, prototype stage or the B-29 fire raids.[1]
The Zero fought from the war's first day to its last, an increasingly outdated 1939 design facing far more advanced 1945 opponents.[1]
For roughly its first eighteen months in service the Zero's lightness made it the most dangerous fighter in the Pacific; for the rest of the war, the same design choices - no armour, no self-sealing tanks - made it increasingly vulnerable.[1]
Culturally it never faded: the definitive symbol of the Pacific War in Japan (Horikoshi's story reached global audiences through Miyazaki's 'The Wind Rises'), and a treasured rarity everywhere - only a handful of Zeros survive, and fewer still fly, their radial growl the rarest sound at any warbird gathering.[4]
No wartime Zeros remain in military service, so the only aircraft appearing on Flightradar24 are the handful of restored, ADS-B-equipped warbirds flying at air shows and museum events in the United States and Japan; look for civil warbird registrations near Chino, California (Planes of Fame) or at major air show circuits.
| Performance | |
| Max Speed | 288 kn (331 mph / 533 km/h) |
|---|---|
| Cruise SpeedCruise Speed — The economical speed an aircraft sustains for the bulk of a flight - lower than maximum speed, chosen for the best balance of time and fuel burn. Glossary → | 207 mph |
| RangeRange — How far an aircraft can fly without refuelling. Quoted figures vary with payload, speed and reserves - see also ferry range and combat radius. Glossary → | 1,160 mi combat range; up to 1,930 mi ferry range with drop tank |
| Service CeilingService Ceiling — The highest altitude at which an aircraft can still climb at a useful rate (typically 100 ft/min). Above it, the air is too thin to keep climbing meaningfully. Glossary → | 33,000 ft |
| Airframe & Weight | |
| Wingspan | 39 ft 4 in |
| Length | 29 ft 9 in |
| Height | 10 ft 0 in |
| WeightMTOW — Maximum Take-Off Weight - the heaviest an aircraft is certified to be at the start of its take-off run, including fuel, crew, payload and the aircraft itself. Glossary → | empty: 3,704 lb; loaded: 6,164 lb |
| Power & Payload | |
| Engines | 1 x Nakajima Sakae 12 radial piston engine (940 hp), later variants used Sakae 21 (1,130 hp) |
| ArmamentArmament — The weapons an aircraft can carry: guns, missiles, bombs and rockets, whether mounted internally, on wing hardpoints, or in bomb bays. Glossary → | 2 x 7.7mm Type 97 machine guns, 2 x 20mm Type 99 cannon, plus up to 2 x 60kg bombs or 1 x 250kg bomb (later kamikaze loadout) |
| Crew | 1 |
| CapacityPayload — Everything an aircraft is carrying that isn't the aircraft or its fuel: passengers, cargo, or weapons. Payload and fuel usually trade off against each other. Glossary → | N/A - single-seat fighter |
| Program & Service | |
| Manufacturer | Mitsubishi Heavy Industries |
| Origin | Japan |
| First Flight | April 1st 1939 |
| Service Entry | July 1st 1940 |
| Retired | September 2nd 1945 |
| Number Built | 10,939 |
| Unit Cost | Not publicly disclosed - historical wartime production cost is not meaningfully convertible to modern USD |
3 notable events involving the A6M Zero, 1942 to 1944, accounting for 145 deaths. Curated rather than exhaustive.
During the raid on Dutch Harbor, a damaged Zero crash-landed in a bog on Akutan Island and flipped over, killing the pilot instantly. The nearly intact aircraft was recovered by the US Navy weeks later and became the first Zero closely studied by the Allies, directly informing tactics used against it for the rest of the war.
Sasai, a 27-victory ace, was shot down and killed in his Zero during a dogfight with a US Marine Wildcat over Guadalcanal.
Five bomb-armed Zeros of the "Shikishima" special attack unit carried out the first officially recognised kamikaze strike; one struck the escort carrier USS St. Lo's flight deck, triggering explosions that sank the ship within about 30 minutes and killed roughly 143 US Navy personnel.
| A6M2 Model 11/21 | First production version with folding wingtips for carrier storage; the type that fought at Pearl Harbor and across the early Pacific campaigns. |
| A6M2-N 'Rufe' | Nakajima-built floatplane fighter derivative for operations without airstrips or carriers. |
| A6M3 Model 32/22 | Fitted with the more powerful two-speed-supercharged Sakae 21 engine; Model 32 had squared, non-folding clipped wings for speed at the cost of range. |
| A6M5 Model 52 | Widely regarded as the most effective variant, with redesigned exhaust stacks for added thrust and strengthened, non-folding wings; later sub-variants (5a/5b/5c) added heavier-caliber guns and armor. |
| A6M7 | Final operational dive-bomber/attack variant with a reinforced airframe, used for both conventional attack and kamikaze missions in 1945. |
| A6M2-K | Two-seat trainer conversion built by Hitachi and the Sasebo Naval Air Arsenal. |
Only a handful of Zeros survive with original Japanese engines still installed, most captured and evaluated by the Allies during the Pacific War. These two are the best-documented flying examples.
Source: The Aviationist
Numbered as cited in the Overview article. Click a reference to see where it's used.
Additional reading you might find interesting...
PlanesDB entries are living documents - this is how this one has evolved, and who helped make it happen. Spotted something out of date? Help update it.
