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Rikugun Ki-93

Heavy Fighter / Anti-Shipping Attack Aircraft Prototype

Rikugun Ki-93

Heavy Fighter / Anti-Shipping Attack Aircraft Prototype

OVERVIEW
SPECIFICATIONS
ARMAMENT
VARIANTS
HISTORY
MEDIA
OVERVIEW



Intended for the Imperial Japanese Army of World War 2, the Rikugun Ki-93 heavy fighter only saw one completed prototype before the end, a second laying unfinished.
National Flag Graphic
ORIGIN: Imperial Japan
YEAR: 1945
MANUFACTURER(S): Army Aerotechnical Research Institute - Imperial Japan
PRODUCTION: 1
OPERATORS: Imperial Japan (cancelled)
SPECIFICATIONS



Unless otherwise noted the presented statistics below pertain to the Rikugun Ki-93 model. Common measurements, and their respective conversions, are shown when possible.
CREW: 2
LENGTH: 46.65 feet (14.22 meters)
WIDTH: 62.34 feet (19 meters)
HEIGHT: 15.91 feet (4.85 meters)
WEIGHT (EMPTY): 16,954 pounds (7,690 kilograms)
WEIGHT (MTOW): 25,221 pounds (11,440 kilograms)
ENGINE: 2 x Mitsubishi Ha-214 18-cylinder air-cooled radial piston engines developing 1,970 horsepower each (take-off power).
SPEED (MAX): 388 miles-per-hour (625 kilometers-per-hour; 337 knots)
RANGE: 1,864 miles (3,000 kilometers; 1,620 nautical miles)
CEILING: 39,534 feet (12,050 meters; 7.49 miles)
RATE-OF-CLIMB: 2,140 feet-per-minute (652 meters-per-minute)




ARMAMENT



Ki-93-Ia Bomber Destroyer:
1 x 57mm Ho-402 cannon in ventral gondola structure
2 x 20mm Ho-5 cannon in wing roots
1 x 12.7mm Ho-103 machine gun on trainable mounting in rear cockpit.

Ki-93-Ib Anti-Shipping Variant:
1 x 75mm cannon in ventral gondola
2 x 550lb conventional drop bombs
VARIANTS



Series Model Variants
• Ki-93 - Base Series Designation; one prototype complete
• Ki-93-Ia - Heavy Fighter variant armed with 1 x 57mm cannon in ventral gondola and 2 x 20mm cannons in wing roots.
• Ki-93-Ib - Anti-Shipping variant armed with 1 x 75mm cannon in ventral gondola; support for 2 x 550 lb bombs.


HISTORY



Detailing the development and operational history of the Rikugun Ki-93 Heavy Fighter / Anti-Shipping Attack Aircraft Prototype.  Entry last updated on 5/22/2016. Authored by Staff Writer. Content ©www.MilitaryFactory.com.
The heavy fighter as a military aircraft class was a constant throughout the inventories of the air services participating in World War 2. Japanese seemed to take a particular interest in the type and held a stable of several strong performers during the period while other designs either failed outright or were ultimately abandoned as the war progressed. The Rikugun Ki-93 was another entry into the category but this design only ever reached the prototype stage with one example completed and a second left unfinished by war's end.

The Ki-93 began life through an initiative by the Japanese Army Aerotechnical Research Institute in 1941. Design studies were undertaken to produce an advanced twin engine, all-metal heavy-class fighter to be powered by a pair of Mitsubishi radials and work spanned into 1943 before a contract was formally issued in February covering two prototypes and one test article.

The finalized design came to be of a conventional heavy fighter arrangement: a slim fuselage would feature a crew of two in tandem (back-to-back) sitting under a heavily-glazed canopy, engines mounted under low-set monoplane wing assemblies, and a "tail dragger" undercarriage used. The tail unit was traditional with its single fin and low-mounted stabilizers. Both the cockpit and wing mainplanes were affixed ahead of midships. Overall dimensions included a length of 46.7 feet, a wingspan of 62.3 feet and a height of 16 feet. Empty weight was 17,000 lb against a gross weight of 25,220 lb.




Power was to come from 2 x Mitsubishi Ha-211 18-cylinder twin-row radial piston engines each delivering 1,970 horsepower on take-off and driving six-bladed propellers. These were fitted to underslung nacelles protruding from the wing leading edges. Performance specifications indicated a sound aircraft for the period with a maximum speed of 388 miles per hour, a cruising speed of 215 miles per hour, a range out to 1,865 miles and a service ceiling of 39,535 feet. Performance was only a key concern for the low-to-medium flight envelopes expected of the machine for its attack role. For this reason, the cockpit section was also armored.

Intended armament for the type was a single 57mm Ho-402 cannon set within a ventral gondola and 2 x 20mm Ho-5 cannons fitted to the wing roots. For defense against trailing interceptors, the rear crewman managed a 12.7mm Ho-103 heavy machine gun on a trainable mount.

Beyond the basic "Ki-93-Ia" heavy fighter / bomber destroyer version planned, there was also a proposed anti-shipping variant as the "Ki-93-Ib" It would carry a 75mm cannon (in the ventral gondola) as well as support 2 x 550lb conventional drop bombs. It is conceivable that both forms would ultimately support launch rails for rockets given their dedicated attack roles.

Completed in March of 1945, first flight of the initial Ki-93 prototype was finally had on April 8th. By this time it was obvious that the Ki-93 had been in development for far too long considering the worsening war situation for Japan - the war had now turned into a defensive one in nature. The twenty minute test flight over Tachikawa Airfield involving two crewmembers ended with a crash as the aircraft hit ahead of the runway, damaging the portside undercarriage, engine and propeller. While the crew escaped, the damage was such that it delayed the program some four weeks as repairs were undertaken. To add further woe to its development phase, an Allied air raid destroyed the Ki-93's hangar - helping to end the project prematurely. The second prototype under construction was never made ready before the end of the war as equipment was still being fitted.




MEDIA









Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

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Relative Maximum Speed Rating
Hi: 400mph
Lo: 200mph
    This entry's maximum listed speed (388mph).

    Graph average of 300 miles-per-hour.
City-to-City Ranges
NYC
 
  LDN
LDN
 
  PAR
PAR
 
  BER
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  MSK
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  TKY
TKY
 
  SYD
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  LAX
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  NYC
Graph showcases the Rikugun Ki-93's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
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Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
1
1

  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


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Supported Roles
A2A
Interception
UAV
Ground Attack
CAS
Training
ASW
Anti-Ship
AEW
MEDEVAC
EW
Maritime/Navy
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Aerial Tanker
Utility/Transport
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Passenger
Business
Recon
SPECOPS
X-Plane/Development
A2A=Air-to-Air; UAV=Unmanned; CAS=Close Support; ASW=Anti-Submarine; AEW=Airborne Early Warning; MEDEVAC=Medical Evac; EW=Electronic Warfare; SAR=Search-Rescue
Supported Arsenal
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