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Archive for June, 2010

Development secret stories # 3 ”Test flight of MXY6″

Posted by kikakuya on June 24, 2010

Captain Tsuruno developed the motor glider of the “ente” type to prove his own theory.
This motor glider named MXY6 looked like Shinden so much. The engine called SEMI was only 22 horsepower.  Three bodies were made by Chigasaki Industry Ltd. that had much experiences of manufacturing wooden yachts.  They were carried to Yokosuka Air Squadron for experiment. First of all, the tow test by the car was started.  However, the nose lowering moment worked because of bad position of the tow metal fittings. MXY6 was not able to take off.  ”Not an airplane but a walker!” it was hooted. This problem was solved at once by changing the position of the hook.   Afterwards, the airframe was moved to Kisarazu that was much wider than Yokosuka.

In the intervals of the training of Air Squadron, Shinden glider was towed to Nakajima B5N and went up in the air.  Separated the hook by 500 meters of the flying height, and flew using an own engine.  Of course,Tsuruno controlled this glider, and the pilot of Nakajima B5N was Masaatsu Kanehiro Technological Captain who is his junior,an engineer pilot.  He confirmed uneasiness was not in manoeuverability and stability of this canard airplane.  In addition, this canard airplane was not easy to stall and also the stalling behavior was good. He had confidence in his insistence more and more. The remaining problems were only next two solutions.

One is an influence of the counter torque to the balance of horizontal direction of the airframe when 6 piece propeller of large diameter and the powerful engine are applied to a small wingspread and airframe.  Another problem is how to make the crew’s urgent escape method so as not to be stricken by a rear propeller.

Afterwards, similar test flights were also carried out at Oppama airport.  Because a good grade in this test flight had been obtained again, The Imperial Japanese Navy Air Service came to support the “Ente” type fighter.

Afterwards, some conferences to decide a concrete plan were opened gathering Military headquarters, Navy Air Service, Yokosuka Naval Flying Corps, and Yokosuka Air Squadron.  However, the conference became complicated because of tactics side committee’ interference. They persisted in the grapple performance as they demanded for all fighters. The equipment of the flap of fighting was demanded. Even a local-defense interceptor “Mitsubishi J2M Raiden” was demanded it.

During this conference, a passionate argument seems to have been between the tactics side and the engineer side.  However, this heated discussion was settled in the decision of “Never decrease the speed!” by General MINORU GENDA.  In any ages, a simple judgment is the best and decides things. The tactics side consented to the high-speed fighter of avoiding the grapple strategy. This fighter was named “Shinden” sign J7 at this conference. And also called the ente model “Front wing type” at the same time. A formal experimental instruction was issued to the Kyushu airplane after this decision.   Well, the design of “Shinden” started rapidly.  The secret story of the design of heterodoxy continues to next time.

Photograph © : J7W1 Shinden House All rights reserved.

Japanese posts after #4 can be seen on the following site.


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