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Yokosuka MXY7-K1 Ohka

DAYTON, Ohio -- Yokosuka MXY7-K1 Ohka Trainer in the World War II Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo)

DAYTON, Ohio -- Yokosuka MXY7-K1 Ohka Trainer in the World War II Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo)

Yokosuka MXY7-K1 Ohka Trainer in the World War II Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo by Ken LaRock)

Yokosuka MXY7-K1 Ohka Trainer in the World War II Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo by Ken LaRock)

Yokosuka MXY7-K1 Ohka Trainer cockpit in the World War II Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo by Ken LaRock)

Yokosuka MXY7-K1 Ohka Trainer cockpit in the World War II Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo by Ken LaRock)

Yokosuka MXY7-K1 Ohka Trainer cockpit in the World War II Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo by Ken LaRock)

Yokosuka MXY7-K1 Ohka Trainer cockpit in the World War II Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo by Ken LaRock)

Yokosuka MXY7-K1 Ohka Trainer cockpit in the World War II Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo by Ken LaRock)

Yokosuka MXY7-K1 Ohka Trainer cockpit in the World War II Gallery at the National Museum of the United States Air Force. (U.S. Air Force photo by Ken LaRock)


Late in World War II, the Dai-ichi Kaigun Koku Gijitsusho (1st Naval Air Technical Arsenal) at Yokosuka, Japan, designed the MXY7-K1 to teach less experienced pilots to fly the Model 11 "Ohka" (Cherry Blossom) kamikaze suicide rocket bomb. The Ohka was carried to the target under a G4M "Betty" bomber. When the Betty/Ohka combination reaching Allied shipping, the Ohka pilot would detach, ignite the rocket motor, and dive into a ship.

This trainer version was carried aloft and then released for practice flights. Unlike the Ohka, the MXY7-K1 had a landing skid and flaps. In place of the warhead and rocket motors of the Ohka, the MXY7-K1 used water ballast that was expelled before landing. Even so, it challenged novice pilots with its high, 130 mph landing speed.

A total of 45 MXY7-K1 trainers were completed by the end of WWII. 

TECHNICAL NOTES (Operational version Model 11 "Ohka"):
Armament: 2,646-lb. warhead
Engines: Three Type 4 Mk.1 Model 20 rockets with a total of 1,764 lbs. thrust
Maximum speed: 615 mph in a powered dive
Range: 55 miles (unpowered glide, 8-10 seconds of rocket thrust for final dive)


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