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Aichi E13A

Aichi · Ship-based Scout · Japan · WWII (1939–1945)

The Aichi E13A (Allied reporting name Jake) was an Imperial Japanese Navy three-seat reconnaissance floatplane — the most-numerous Japanese reconnaissance floatplane of WWII + the principal IJN cruiser-borne + battleship-borne reconnaissance aircraft. Kishiro Matsuo designed the E13A at Aichi Kokuki in 1937-1938; the prototype first flew in late 1938. About 1,418 E13As were built between 1940 and 1945 at Aichi + Watanabe Tekkojo + Hiro Naval Arsenal. The aircraft served IJN cruiser + battleship + land-based reconnaissance squadrons 1941-1945.

The E13A1 used a Mitsubishi Kinsei 43 14-cylinder radial engine (1,080 hp). Maximum speed 376 km/h, range 2,090 km, service ceiling 8,730 m. Armament: 1 × 7.7 mm Type 92 machine gun (defensive) + up to 250 kg of bombs / depth charges. Crew: 3 (pilot + observer + radio operator/gunner). The aircraft used twin-float layout supporting a conventional low-wing monoplane fuselage; takeoff from cruiser + battleship catapults required the floats + reinforced airframe.

E13A service was extensive in IJN Pacific reconnaissance + ASW patrol operations 1941-1945. Combat use included Pearl Harbor (E13As launched from cruiser Tone + battleship Hiei conducted pre-strike reconnaissance + post-strike battle damage assessment), Coral Sea + Midway battle reconnaissance 1942, and Solomon Islands ASW patrol 1942-1944. About 0 E13A airframes survive complete; one nearly-complete airframe is being restored at the Pima Air & Space Museum, Arizona.

For Kids — a shorter, friendlier version

The Aichi E13A Jake was Japan's main scouting seaplane in World War II. "Scouting" means "scouting" — the E13A flew over the ocean looking for enemy ships and reporting their positions back to the Japanese fleet.

The E13A is about 38 feet long — slightly bigger than a school bus. One Mitsubishi Kinsei radial engine. Top speed only 234 mph. The airplane had two floats (one big central float under the body) to land on water. Three crew members: pilot, observer, gunner.

Allied pilots called the E13A "Jake." The E13A's job was to scout for the Japanese fleet — usually launched from cruisers and battleships, then catapulted into the air. Jakes were active in many naval battles: Pearl Harbor (where they scouted the harbor before the attack), the Battle of Midway, the Solomon Islands campaign.

About 1,400 E13As were built between 1938 and 1945. They were the most-numerous Japanese seaplane of WWII. As the war went on, Allied fighters easily destroyed the slow Jakes. By 1944 they were mostly used for kamikaze missions. After WWII, no E13As survived intact — only a few wrecks remain.

Fun Facts

Allied pilots called the Aichi E13A the "Jake."
About 1,400 E13As were built between 1938 and 1945.
The E13A scouted ahead of the Japanese fleet from cruisers and battleships.
The E13A scouted Pearl Harbor before the December 7, 1941 attack.
Top speed only 234 mph — slow even by 1939 standards.
Three crew members: pilot, observer, gunner.
No E13As survived WWII intact — only a few wrecks remain.

Kids’ Questions

How were seaplanes launched from ships?

Some warships in WWII (cruisers and battleships) carried seaplanes that could be launched and recovered while the ship was moving. The seaplane sat on a steam catapult on the deck. Steam pressure shot the airplane off the catapult — going from 0 to flying speed in about 50 feet. The airplane circled to scout for enemy ships, then returned. To land, the seaplane landed on the water next to the ship. A crane lifted it back onto the deck. This was complicated but useful — gave ships extra eyes and reach before aircraft carriers became common. The E13A, OS2U Kingfisher (American), and Walrus (British) all worked this way.

How were seaplanes useful in WWII?

Seaplanes had advantages and disadvantages compared to regular airplanes. Advantages: they didn't need an airbase — could land in any sheltered bay, river, or harbor. Useful for scouting from cruisers, rescuing downed pilots, and patrolling oceans. Disadvantages: heavy floats added drag — making them slower than regular airplanes. WWII saw the last big use of military seaplanes. After the war, airbases were everywhere, regular fighters were faster, and dedicated seaplanes faded away. A few specialized seaplanes still exist today (firefighting amphibians, search-and-rescue) but no major military operates seaplanes anymore.

Variants

E13A1 (basic): Standard production. About 1,300 built.
E13A1a / E13A1b (refined): Late-war refined variants. About 100 built.

Notable Operators

Imperial Japanese Navy (1941-1945): Sole operator. Cruiser + battleship + land-based reconnaissance.

Frequently Asked Questions

Did E13As fly at Pearl Harbor?

Yes. E13A reconnaissance floatplanes launched from IJN cruiser Tone + battleship Hiei conducted pre-strike reconnaissance over Pearl Harbor before the December 1941 main attack. Tone-launched E13As provided the final pre-strike battle damage assessment that confirmed American battleship locations + aircraft dispositions. Post-strike E13A reconnaissance documented the damage achieved by the first wave + provided targeting intelligence for the second-wave Japanese carrier strike.

Sources

Wikipedia — Aichi E13A