Pacific Wrecks
Pacific Wrecks    
  Missing In Action (MIA) Prisoners Of War (POW) Unexploded Ordnance (UXO)  
Chronology Locations Aircraft Ships Submit Info How You Can Help Donate

Mitsubishi Type 99 Assault/ Recon Ki-51 (Sonia)
Technical Information

Single engine, fixed landing gear aircraft with a crew of two and armed with only three 7.7mm machine guns (two in wings, one flexible gun for rear gunner). Despite its apparent obsolescence it was never replaced. Pilots and ground crews liked the plane because it was easy to fly, maintain, and operate from small airfields at the front lines. Operated by the Japanese Army Air Force (JAAF).

Reconnaissance Version (Guntei, Ki-51A)
(Kyu Kyu Shiki Gun Teisatsu Ki) Reconnaissance version. Production ended during November 1941. The 83rd Independent Air Chutai operated the Ki-51A Sonia in China until April 1943 at Luisu Airfield then transfered to the South Seas Area, operating from Wewak Central Airfield using Madang Airfield as a forward operating base and operated from Lae Airfield during the middle of May 1943 until the the Allied liberation of Lae.

Assault Version (Ki-51B)
(Kyu Kyu Shiki Shuugeki Ki) Also known as Shugeki or Shuhgeki. The assault version had armor plating protecting the pilot and oil tanks, and bomb racks to carry 441 pounds of bombs. This version could be modified in the field to carry an aerial camera. The 26th Flying Regiment operated the Ki-51B Sonia in New Guinea.

A total of 2,388 were built, by two factories: Mitsubishi and the 1st Army Air Arsenal
Mitsubishi produced a total of 1,472.
1st Army Air Arsenal produced a total of 913.

Production Record of the Type 99 Assault / Recon Plane by Jim Long
Advance Echekon FEAF Tokyo "Monthly Production Figures on aircraft, engines & propellers" October 26, 1945 page 6
軍偵部隊の足跡 / Guntei Butai No Ashiato: Dokuritsu Hiko Dai 83 Chutai Shi - "Footsteps of a Tac Reconn Unit: History of the 83rd Independent Flying Chutai 1988
Thanks to Nicholas Millman and Richard Dunn for additional information

Technical Details (Ki-51B)
Crew  Two (pilot, observer)
Engine  14 cylinder air cooled
Span  12.1m
Length  9.21m
Height  2.73m
Maximum Speed  263 mph
Range  660 miles
Armament  (wings) 2 x 12.7mm MG (rear) 1 x 7.7mm MG
Bomb Load  441 pounds

  Discussion Forum Daily Updates Reviews Museums Interviews & Oral Histories  
Pacific Wrecks Inc. All rights reserved.
Donate Now Facebook Twitter YouTube Google Plus Instagram