Mitsubishi Ki-21

E48176

World War II aircraft bomber aircraft military aircraft twin-engine aircraft

The Mitsubishi Ki-21 was a twin-engine Japanese heavy bomber used extensively by the Imperial Japanese Army during the early years of World War II.

Predicate	Object
instanceOf	World War II aircraft → bomber aircraft → military aircraft → twin-engine aircraft →
aircraftCategory	land-based bomber →
aircraftRole	heavy bomber →
allianceReportingName	Gwen → Sally →
armament	defensive machine guns → internal bomb load →
conflict	Second Sino-Japanese War → World War II →
countryOfOrigin	Japan →
crew	5 →
designPeriod	1930s →
engineConfiguration	two engines →
engineType	Nakajima Ha-5 radial engine →
era	World War II era → interwar period →
firstFlight	1936 →
fuselageType	all-metal construction →
introduced	1938 →
landingGear	retractable tailwheel landing gear →
manufacturer	Mitsubishi Heavy Industries →
nickName	Gwen → Sally →
numberBuilt	2064 →
operator	Imperial Japanese Army Air Force →
originatingCompany	Mitsubishi →
powerplant	2 × Nakajima Ha-5 radial engines →
primaryUser	Imperial Japanese Army Air Service →
retired	1945 →
serviceBranch	Imperial Japanese Army Air Service →
usedBy	Imperial Japanese Army →
usedExtensivelyIn	early years of World War II →
usedInRegion	China → Pacific theater → Southeast Asia →
wingConfiguration	low-wing monoplane →

Subject (surface form when different)	Predicate
Imperial Japanese Army Air Service →	usedAircraft