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Army. Via ibiblio.org
Mitsubishi Ki-21-IIa "Sally"
|73'10" by 52'6" by 15"11"
22.50m by 16.00m by 4.85m
|302 mph at 15,485 feet
486 km/h at 4720 meters
| 25 feet per second
7.6 meters per second
|2 1450 hp (1081 kW) Mitsubishi Ha-101 14-cylinder two-row radial engines, driving constant speed three bladed metal propellers.|
89 Single machine guns in
nose, ventral, and two beam positions.
1 7.7mm Type 89 Special machine gun in dorsal position.
1 7.7mm Type 89 Model 2 Te-1 machine gun in tail.
|Normal 1653 lb (750kg)
Maximum 2205 lb (1000kg)
|932 miles (1500km) normal
1680 miles (2700km) maximum
The Ki-21-I used
two 850 hp (634 kW) Nakajima Ha-5-Kai
engines and had just three guns. Its
bomb load was
1650 lbs (750kg.)
The Ib added two guns and a larger bomb bay. The fuel tanks were partially self-sealing.
The Ic added a sixth gun
and more fuel capacity.
The IIb replaced the dorsal greenhouse canopy of earlier versions with a turret containing a 12.7mm Type 1 machine gun.
The Ki-21 was the Japanese Army’s principal bomber during the China Incident. It continued in use throughout the Pacific War, with some committed to combat in the Philippines as late as 1944. Like most Japanese bombers, it was lightly constructed and initially had no self-sealing fuel tanks, and it became an easy target for Allied fighters.
The design dated back to 1936 and came in response
to a Japanese Army request for an aircraft to match the best
twin-engine bombers. The Mitsubishi design team, led by Nakata and
completed two prototypes in December 1936. The Army could not
between the Ki-21 and the competing Ki-19 and ordered improved
prototypes in June 1937. The improved Ki-21 easily won the
and went into production in early 1938. "Sally" was a considerably
forward for Japanese Army aviation, and it was well liked by its
but, by 1941, it was already obsolescent.
The initial Allied code name for this aircraft was
"Jane," but this was quickly changed to "Sally," apparently
appreciate having a Japanese bomber named after his wife. The
variant was named "Gwen" until it was realized that this was
new variant of "Sally" with the dorsal greenhouse canopy replaced
a turret. This was an attempt to reduce the vulnerability of
modern Allied fighter aircraft.
A number of Ki-21-Ias were converted to transports pending
delivery of the Ki-57 "Topsy".
campaign, the Japanese experimented with the use of "Sally" as a PT boat hunter, in
attempt to protect their barge traffic from Rabaul to New Guinea. This proved
unsuccessful. "Sally" was also used in special operations, such as
raid on Yontan airfield on Okinawa following its capture
by the Americans.
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