Mitsubishi Zero

The Mitsubishi Zero was considered to be the most capable carrier-based fighter aircraft in the world when it first entered combat in 1940. Its superior capabilities were in part due to its amazingly light weight that made it one of the fastest, most maneuverable and one of the longest-ranged single-engine fighter aircraft of World War II. However, that tradeoff in weight was at the price of not having self-sealing fuel tanks which made it prone to catching fire and exploding when struck by enemy fire, and no armor protection for either the pilot or the engine.