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Japan's Imperial Army flag

Japan's Mitsubishi Ki-57 transport, Army Type 100
Allied Code Name: Topsy

Photos

Mitsubishi MC.20, Y-98 transport:
Japan's Mitsubishi MC.20, Y-98 transport
Aeronautics Aircraft Spotters' Handbook
Mitsubishi MC.20, Y-98 transport:
Japan's Mitsubishi MC.20, Y-98 transport
Aeronautics Aircraft Spotters' Handbook

Design

Dai Nippon Koku K.K. asked Mitsubishi to design and build a civilian transport similar to the Ki-21 bomber.1 As the project progressed the Japanese Army took over the project.1

The design of the Ki-57 took many of the same parts of the plane from the Ki-21 bomber, but the fuselage was unique.1

Wings

The wings on the Ki-57 were placed low in relation to the fuselage.1

Prototype

The first Ki-57 prototype was finished in July 1940.1

Production

  • Mitsubishi Ki-57: 1011
  • Mitsubishi Ki-57-II:
  • Total: 5071
    • Manufacturer: Mitsubishi Jukogyo K.K.1
    • Production: July 1940 - January 19451

Variants

  • Mitsubishi Ki-57: Army transport.1
  • Mitsubishi MC-20: Civilian transport.1
  • Mitsubishi L4M1: Navy transport.1
  • Mitsubishi Ki-57-II: More powerful engine which caused engine housing to be redeveloped.1
  • Mitsubishi MC-20-II: Civilian transport.1

Usage

The Ki-57 was the Japanese Army's standard transport aircraft and was used to transport personnel and paratroops.1

Paratroop Drop at Palembang

The Ki-57s were used on February 14, 1942, in a paratroop drop at the Palembang oil installation in Sumatra.1 Seven hundred paratroopers were dropped.1

After World War II

One of the few aircraft to continue serving after World War II, the remaining Ki-57s were used by Dai Nippon Koku K.K.1 They were used until October 10, 1945.1

Specifications

  Mitsubishi Ki-571
Type Transport1
Crew  
Passengers  
Engine (Type) 2: Nakajima Ha-5 KAI1
Cylinders  
Cooling  
Net HP 950 each1
Propeller blades  
Dimensions  
Span  
Length  
Height  
Wing area  
Weight  
Empty  
Normal load  
Maximum load  
Performance  
Speed  
Climb  
Service ceiling  
Range  
Armament  
  Mitsubishi MC.20
Type Transport2
Crew  
Passengers  
Engine (Type) 2: Mitsubishi Kinsei2
Cylinders  
Cooling  
Net HP 850 each2
Propeller blades  
Dimensions  
Span 74'2
Length 52' 9"2
Height 16' 2"2
Wing area  
Weight  
Empty  
Normal load 18,300 lb2
Maximum load  
Performance  
Speed  
Climb  
Service ceiling  
Range 1,500 miles2
Armament  
  Mitsubishi Ki-57-II1
Type Transport1
Crew 41
Passengers 111
Engine (Type) 2: Mitsubishi Ha-1021
Cylinders Radial 141
Cooling Air1
Net HP 1,080 each1
Propeller blades  
Dimensions  
Span 74' 1"1
Length 52' 10"1
Height 15' 11"1
Wing area  
Weight  
Empty  
Normal load 18,018 lb1
Maximum load  
Performance  
Speed @ 19,090' 292 mph1
Climb  
Service ceiling 26,250'1
Range 1,865 miles1
Armament None1

Sources:

  1. World War II Airplanes Volume 2, Enzo Angelucci, Paolo Matricardi, 1976
  2. Aeronautics Aircraft Spotters' Handbook, Ensign L. C. Guthman, 1943
20th Century American Military History Crucial Site