In 1944, the Institute of Technology planned a prototype of a glide aircraft for the purpose of researching the performance of the canard aircraft as the first research project. The aircraft was produced by a Japanese small airplane, and at the end of 1944, the design was started by the engineer, And the aircraft was completed at the end of March 1945, and flight experiments began. As a flight experiment plan, and when increasing the wing surface load by shortening the wing width, flight experiments in the case of removing the vertical stabilizer was scheduled. The results of the experiment were also used in the development of Shinden canard fighter, which the Navy had been planning.
The aircraft is a double-seat canard aircraft with a high aspect ratio main wing, and the material is all wood. There is a rudder that also serves as an air brake at both ends of the main wing. There is a vertical stabilizer at the rear of the fuselage, but the rudder does not have.
The Chikara（ちから）-type glider was a training glider (military glider) of the Imperial Japanese Navy. The aircraft was manufactured by Nippon Small Aircraft Co., Ltd. It was also called "K-12" in the company of Nippon Small Aircraft Co., Ltd.
The Chikara-type glide aircraft was planned by the Imperial Japanese Navy Aviation Technology Arcenal for the purpose of training the crew of the 16-shi special transport aircraft (MXY5). The prototype of the Chikara-type glide was ordered to Nippon Small Aircraft Co., Ltd. in September 1941, and the design of the aircraft was done by the company's chief engineer Miyahara. Three prototypes were completed in mid-November 1941, and they received a research review at Kasumigaura Airfield and showed good results. It should be noted that the name "Chikara" was named during development by the Nippon Small Aircraft Co., Ltd. side, it was originally a temporary name, but later became official name.
Since the MXY5 was terminated in prototype fabrication stage, the Chikara-type glide aircraft was also temporarily discontinued production, about five aircraft are produced, such as the Fuji glider companying as a training glider for the The Army Type-4 special transport glider that was to be operated in place of MXY5, It was operated in Ishioka Detachment Corps of Kasumigaura Naval Air Corps (later the third squadron). In addition, japan Small Airplane Co., Ltd. started production for the crew training of Shusui rocket interceptor, but production was discontinued when three aircraft were completed in response to the end of the Pacific War.
In addition, as a training aircraft for the crew of Ooka special attack aircraft, the attack practice aircraft "Wakazakura" equipped with a small gunpowder rocket engine was also prototyped, but production has reached the end of the war without being carried out. There is also a opinion that the Wakazakura themselves were scheduled to be used in a suicide attack.
The Chikara-type glider was particularly focused on high-speed towing training, and it was an aircraft capable of unlimited aerobatics, and it adopted the cockpit of the tandem double seat, which is unusual as an unlimited aerobatic machine at the time. The aircraft structure of the Chikara-type glider was a plywood-shaped upholstered wooden frame, and in order to bring the flight characteristics closer to that of the MXY5, the wing cross-section and aspect ratio of the main wing are approximated to the MXY5, and the camber change flap for aerobatic flight is equipped with the main wing. Further, while to make the structure of the nose portion around the cockpit robust, the fuselage rear is provided on the assumption that it is destroyed at the time of emergency landing "naturally destruction point". The landing gear were semi-retracted single wheel and nose skid. Type 93 intermediate training aircraft and type 97 ship attack aircraft were used for the towing aircraft, and it was possible to tow two Chikara glider in one aircraft when using the Type 97 ship attack.
Length: 8.8 m, Width: 11.25 m, Wing area: 18.0 m2, Empty Weight: 326 kg, Total weight: 516 kg, Best glide speed: 100 km/h, Crew: 2