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Japan's Imperial Navy flag

Japan's Yokosuka MXY-7 Ohka (cherry blossom) suicide attack plane
Allied code name: Baka

Design

The Ohka was developed by an Imperial Japanese Navy officer starting in the summer of 1944.1,2

The Ohka was to be attached to a large aircraft, usually a G4M2e, would then carry it to near it's target and then release it.1,2

Wood was the primary construction material of the Ohka.1

Prototype

The first unpowered flight was in October 1944.1 In November 1944 powered flights were conducted.1

Production

  • Yokosuka Model 11: 7551,2
    • Production: September 1944 - March 19451
  • Yokosuka Model 22: 501
  • Yokosuka Model K-1: 451
  • Yokosuka Model 43 K-1 KAI: 21
  • Total: 8521,2
    • Manufacturer: Dai-Ichi Kaigun Koku Gijitsusho2

Variants

  • Yokosuka Model 11:
  • Yokosuka Model 22: Turbojet powered.1
  • Yokosuka Model K-1: Trainer.1 Had water ballast in the nose.1
  • Yokosuka Model 43 K-1 KAI: Two seat trainers.1

Usage

On March 21, 1945, the first Ohka mission was flown.1 Mitsubishi G4M bombers carried 16 Ohkas and were intercepted by United States Navy Hellcats.1 All the G4Ms were shot down and all the Ohkas crashed into the sea.1

On April 1, 1945, the USS West Virginia and three transports were damaged by Ohkas.1,2 The USS Mannert L Abele was sunk on April 12, 1945, off of Okinawa, which became the first Allied ship sunk.1,2

Specifications

  Yokosuka MXY-7 Ohka1
Type Suicide attack1
Crew 11
Engine (Type)  
Thrust  
Dimensions  
Span  
Length  
Height  
Wing area  
Weight  
Empty  
Loaded  
Performance  
Speed  
Dive speed  
Range  
Armament  
Explosives  
  Yokosuka MXY-7 Ohka Model 111,2
Type Suicide plane
Crew  
Engine (Type) 3: Type 4 Mk 1 Mod. 20 rockets2
3: Type 4 Mark 1 Model 21 solid fuel1
Thrust 1,750 lb2, 1,764 lb1
Dimensions  
Span 16' 9"2, 16' 9.5"1
5.12 m1
Length 19' 10.75"1, 19' 11"2
6.06 m1
Height 3' 9"1, 3' 10"2
1.14 m1
Wing area  
Weight  
Empty 970 lb1
440 kg1
Loaded 4,718 lb1,2
2,140 kg1
Performance  
Speed 403 mph1
648 kph1
Speed @ 11,485' 403 mph2
Dive speed 576 mph1,2
927 kph1
Range 23 miles1,2
37 km1
Armament  
Explosives 2,646 lb1,2
1,200 kg1
  Yokosuka MXY-7 Ohka Model 121
Type  
Crew  
Engine (Type)  
Thrust  
Dimensions  
Span  
Length  
Height  
Wing area  
Weight  
Empty  
Loaded  
Performance  
Speed 276 mph1
445 kph1
Dive speed  
Range 80 miles1
128 km1
Armament  
  Yokosuka MXY-7 Ohka Model 221
Type  
Crew  
Engine (Type) 1: Tsu-11 turbojet1
Thrust 550 lb1
Dimensions  
Span 13' 6.25"1
4.12 m1
Length 22' 7"1
6.88 m1
Height 3' 9.25"1
1.15 m1
Wing area  
Weight  
Empty 1,202 lb1
545 kg1
Loaded 3,197 lb1
1,450 kg1
Performance  
Speed  
Dive speed  
Range  
Armament  
Explosives 1,323 lb1
600 kg1

Sources:

  1. Aircraft of WWII, Stewart Wilson, 1998
  2. World War II Airplanes Volume 2, Enzo Angelucci, Paolo Matricardi, 1976
20th Century American Military History Crucial Site