On 8 September 1943, instructions were issued to redesign the Nakajima Ki-84 Hayate all-metal single-seat fighter (which see) for wooden construction because of the increasingly critical light alloy supply situation. The task of redesigning the airframe was assigned to the Tachikawa Hikoki which was to collaborate with the Army Aerotechnical Research Institute at Tachikawa. Assigned the designation Ki-106, the wooden fighter was intended to utilise a high proportion of semi-skilled labour in its construction and to be broken down into components to be built by small wood-working shops grouped around designated assembly points. Prototype construction was sub-contracted to Ohjo Koku, but the first of three prototypes was not flown until July 1945. The external characteristics of the Ki-84 were faithfully retained by the Ki-106, apart from some minor revision of the vertical tail, the first prototype being powered by the 2,000 hp Nakajima Ha-45-21 engine and carrying an armament of four 20-mm cannon. Appreciably heavier than the standard Ki-84, the Ki-106 was subjected to various weight saving measures, one of these being a reduction in the armament to two 20-mm cannon, and the second prototype flew with this armament during the last week of the war. Max speed, 385mph (620km/h) at 21,325ft (6 500m). Time to 16,405ft (5 000m), 7.85min. Normal range, 497mis (800 km)plus 1.5 hrs. Empty weight, 6,499 lb (2 948 kg). Loaded weight, 8,5981b (3 900 kg). Dimensions as for Ki-84 apart from height of 11 ft 9VA in (3,59 m).
| Take-off weight||3900 kg||8598 lb|
| Empty weight||2948 kg||6499 lb|
| Max. speed||620 km/h||385 mph|
| Range||800 km||497 miles|
|Richtofen (AKA The Doktor), 10.08.2016|
Jan Hoek late reply to put it mildly, but yes, extremely so.It could out turn a Spitfire with ease, yet was much more rugged and heavily armoured.
I thought that was good idea to build aircraft under ground, but was not all that interested at the time. I was 20 years old at the time. The undrground facility became a storm shelter before I left for the states in 1956.
|Lance Lemcool, 17.03.2011|
Looks very much like a P-47 Thunderbolt
|Mike Skidmore, 29.12.2010|
Fred Watkins email me at firstname.lastname@example.org, i have thousands of tachikawa ab photos and also have a web site for tachi.
The Ki-106 was the all-wood version of the Ki-84 Frank
|Fred Watkins, 02.09.2010|
When I was stationed at Tachikawa Japan in 1955 a Slick airways freighter parked in front of base ops had one of its main gear fall drop through the parking ramp pavement. Invetigation revealed an underground aircraft factory and there was one aircraft ready to roll off the asssembly line. I thought that was good idea to build aircraft under ground, but was not all that interested at the time. I was 20 years old at the time. The undrground facility became a storm shelter before I left for the states in 1956.
|Jan Hoek, 20.07.2007|
Was the KI-84 manouvreable at low or high speed due to his butterfly combat flaps?
Do you have any comments about this aircraft ?