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Tachikawa Ki-106 (Ki-84 Hayate)


All-Wood Single-Seat Fighter Prototype


Imperial Japan | 1945



"The Tachikawa Ki-106 was an all-wooden form of the classic Nakajima Ki-94 Hayate fighter line."



Authored By: Staff Writer | Last Edited: 02/08/2018 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.
Because of the deteriorating war situation for Japan amidst the relentless Allied bombing campaign of the Japanese homeland, high-performance aircraft of all sorts were sought to contend with the new generation of Allied fighters and the arrival of the American Boeing B-29 "Superfortress" high-altitude heavy bomber. The Nakajima Ki-84 "Hayate" represented one of the finer mid-to-late-war fighters available to the nation and went on to see 3,514 examples produced while being regarded as the best quantitatively-available Japanese fighter of the entire conflict. It was decided to develop a low-cost, all-wood version of this fighter to reduce the reliance on valuable alloys and other precious war material needed elsewhere. This initiative became the forgotten Tachikawa "Ki-106".

The requirement appeared in September of 1943 and was assigned to Tachikawa Hikoki engineers. Their mission was to redesign the classic Ki-84 into a fully wooden form with assistance given through the Army Aerotechnical Research Institute. Beyond its all-wood construction, the aircraft was simplified for low-skilled labor to be employed in its construction process essentially making the Ki-106 a budget fighter able to be built in just about anyplace resembling a common wood shop. Final assembly would require slightly more skilled labor but the end result would be an easier-to-produce fighter platform desperately in need by the air services of Japan.

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The Ki-106 mimicked much of the form and function of the all-metal Ki-84 before it. Ohjo Koku handled construction of the prototypes to which the first (of three) flew in July of 1945. The protracted development of the product meant that it did not go airborne until very late in the war when Japanese losses were insurmountable. Power came from a single Nakajima Ha-45-21 series radial piston engine driving a three-bladed propeller through 2,000 horsepower output. Wing mainplanes were featured forward of midships as in the Ki-84 and the cockpit was held over center. Armament was reduced from the 4 x 20mm cannon arrangement seen in the Ki-84 to a 2 x 20mm cannon battery as a weight-saving measure (the all-wood construction of the Ki-106 made it heavier than the all-metal form).

The three prototypes were all that was built of the Ki-106 line for the Japanese surrender of 1945 ended development of this Japanese "wooden wonder". The second prototype managed to go airborne just before the cessation of hostilities and was outfitted with its proposed armament scheme showing some progress.

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Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the Tachikawa Ki-106 All-Wood Single-Seat Fighter Prototype.
1 x Nakajima Ha-45-21 radial piston engine developing 2,000 horsepower.
Propulsion
385 mph
620 kph | 335 kts
Max Speed
37,730 ft
11,500 m | 7 miles
Service Ceiling
1,118 miles
1,800 km | 972 nm
Operational Range
2,090 ft/min
637 m/min
Rate-of-Climb
City-to-City Ranges
Operational range when compared to distances between major cities (in KM).
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Structure
The nose-to-tail, wingtip-to-wingtip physical qualities of the Tachikawa Ki-106 All-Wood Single-Seat Fighter Prototype.
1
(MANNED)
Crew
32.5 ft
9.92 m
O/A Length
36.9 ft
(11.24 m)
O/A Width
11.8 ft
(3.60 m)
O/A Height
6,504 lb
(2,950 kg)
Empty Weight
8,598 lb
(3,900 kg)
MTOW
Design Balance
The three qualities reflected below are altitude, speed, and range. The more full the box, the more balanced the design.
RANGE
ALT
SPEED
Armament
Available supported armament and special-mission equipment featured in the design of the Tachikawa Ki-106 (Ki-84 Hayate) All-Wood Single-Seat Fighter Prototype .
STANDARD:
2 x 20mm cannons in wings
Variants
Notable series variants as part of the Tachikawa Ki-106 (Ki-84 Hayate) family line.
Ki-106 - Base Series Designation; three prototypes completed.
Operators
Global customers who have evaluated and/or operated the Tachikawa Ki-106 (Ki-84 Hayate). Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 3 Units

Contractor(s): Tachikawa Hikoki / Ohjo Koku - Imperial Japan
National flag of modern Japan

[ Imperial Japan (cancelled) ]
Relative Max Speed
Hi: 400mph
Lo: 200mph
Aircraft Max Listed Speed (385mph).

Graph Average of 300 MPH.
Era Crossover
Pie graph section
Showcasing Aircraft Era Crossover (if any)
Max Alt Visualization
Small airplane graphic
Production Comparison
3
36183
44000
Entry compared against Ilyushin IL-2 (military) and Cessna 172 (civilian) total production.
MACH Regime (Sonic)
Sub
Trans
Super
Hyper
HiHyper
ReEntry
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030
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Mission Roles
Some designs are single-minded in their approach while others offer a more versatile solution to airborne requirements.
AIR-TO-AIR COMBAT
X-PLANE
Recognition
Some designs stand the test of time while others are doomed to never advance beyond the drawing board; let history be their judge.
Going Further...
The Tachikawa Ki-106 (Ki-84 Hayate) All-Wood Single-Seat Fighter Prototype appears in the following collections:
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