The video today features the first prototype of one of the most unique Japanese aircraft ever produced, the Kyushu J7W "Shinden", during taxiing tests.
The original 8mm film was shot by Engineer Kiyohara Kunitake, an 8mm film enthusiast who, at the time, served as Deputy Chief of the First Design Section at Kyushu Aircraft and oversaw the aircraft’s equipment, piloting, functions, powerplant, and armament teams. It was developed after the war, the image quality is not very good and yet it is a most valuable record of this rare aircraft type.
The location is Mushiroda Airfield in Fukuoka. The airport was built in 1944 by the IJAAF and was named Mushiroda Airfield. After the war, the United States Air Force used the airfield as Itazuke Air Base from 1945 to 1972. Today it is called Fukuoka Airport, the principal airport on the island of Kyushu and the fourth busiest passenger airport in Japan.
The exact date is unknown but most sources mention that these taxiing tests were conducted in late July 1945.
After being transported to the runway and purified by a Shinto priest, the president of the Kyushu Hikoki, the Chief Designer LCDR Tsuruno Masayoshi performed a ritual offering of sacred branches. The engine was then started, and the taxiing test finally began. An Army Type 100 Reconnaissance Aircraft Model 3 can be seen in the rear left.
Below are some captions from the old blue FAOW explaining what we see in the clip.
Before the test run began, LCDR TSuruno, wearing a Navy cap, took the pilot’s seat himself to check the engine’s condition. This first prototype was finally completed shortly after June 10 and transported to Mushiroda Airfield on the 15th; however, modifications and maintenance to the radiator and hydraulic systems took a full month, and the final inspection was conducted in mid-July inside the tunnel hangar at Mushiroda.
A view from the front during the engine test run. The Mitsubishi Ha-43 Model 12 engine, with a takeoff power of 2,030 hp (2,900 rpm), rotates powerfully, emitting a distinctive, piercing roar. Because the cockpit is high off the ground, a long ladder was placed against the No. 1 prototype; a boarding mechanism allowing for quick entry was scheduled to be installed before mass production began.
The taxiing test is about to begin. LCDR Tsuruno, with a tense expression, is about to enter the cockpit. The antenna mast protruding from the right side of the nose is for the Type 3 Ku-1 radio telephone. There is another one below the front windshield of the cockpit.
A view from the front-left just before the taxi test. With the engine at full throttle, the shadow of the 6-bladed propeller, 3.400 m in diameter, is clearly visible. The designers and prototype development staff watch over the scene.
The first prototype of the "Shinden", piloted by Major Tsuruno, took off in a cloud of dust, but just as it seemed the nose was lifting slightly near the north end of the runway, the aircraft spun halfway around and came to a stop. It is shown here taxiing back a short while later.
Upon shutting down the engine and inspecting the aircraft, it was found that the tip of the propeller had bent about 50 cm. This was caused by the nose rising too high during the run, causing the propeller to strike the ground. Afterward, the tail wheels from Kyushu K11W "Shiragiku" were temporarily attached to the underside of the wing.
The propeller was replaced with one intended for the second prototype, and the “first flight” took place on August 3 which we will see in the following post.
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