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Micubiši J4M Senden

Mitsubishi J4M Senden - přehled verzí

Mitsubishi J4M - an overview of the versions
閃電 - Senden - flash of lightning
Ground experimental interceptor fighter 17-Shi Otsu

J4M1 - project M-70A

J4M1 - project M-70B



project Description:

- Is a little-known fact, that the command of the japanese naval air force (Kaigun Kōkū Hombu) already in 1942, tried to the security of the development retention of high-rise fighters, which would have been able to effectively fight against heavy čtyřmotorovým bomber aircraft. Proof of us offered technical specifications (Shizaku) 17-Shi Otsu (17-Shi B), these specifications, from the end of 1942, announced the Kaigun Kōkū Hombu producers of aviation technology your requirements for this category of aircraft. In 1942 they were issued specifications Shizaku requiring the development of fighter aircraft twice, first issued specifications 17-Shi Ko (17-Shi A), which was requested by the successor of the famous Zero – on-board fighter aircraft A7M Reppu. Later Kaigun Kōkū Hombu issued a specification of the second - 17-Shi Otsu, which required the successor to the overflow tank J2M Raiden.

- Other specifications gave rise to an interesting very projects, the company 川西航空機株式会社 – Kawanishi Kōkūki Kabushiki Kaisha (hereinafter referred to as Kawanishi) proposed a classically conceived tactical aircraft J3K1, and the company 三菱重工業 - Mitsubishi Jūkōgyō Kabushiki Kaisha (hereinafter referred to as Mitsubishi) has developed two unusually conceived projects of a commando fighter with a pusher propeller J4M1 Senden and after their completion, it was the navy asked to adjust the on-board tank A7M into the overflow fighters to ground bases A7M3-J Reppu-Kai

- let's go Back to the unusual project overflow tank J4M1 Senden, these were two separate projects dvoutrupého overflow tank to the center of the gondola, in which the back part was a massive osmnáctiválec Mitsubishi MK9D, this engine powered šestilistou pusher prop (some authors mention the four-bladed). the Aircraft was designed as an all-metal biplane, which had a horizontal tail area between the two trupovými gondolas, such a solution with the use of a pusher propeller in the middle of the gondola has brought the advantage of a good unadulterated view ahead and at the same time the loose front part could install effective weapons to fight with the big bombers and in addition, their rate of fire was reduced synchronization.

- Both projects have been in the factory designated M-70, the first project had a bigger trupovou gondola, the cabin of the pilot was richly glazed and didn't perform outside the contour of the fuselage nacelle, behind the cab slightly above the contour stood out two catchers air the supply air for engine cooling. On the basis of this project was built a scale model, which was ofukován in a wind tunnel. The result of the tests was mediocre, the aerodynamic solution was not very good and had a biker factory problems with odladěním prototypes of the engine MK9D. The second project was slightly above the contour of the protruding kapkovitou cabin, and just before the wings around the perimeter of the hull were the inputs for the entry of cooling air, the air featured regulatory flaps at the level of the trailing edges of the wing, again around the perimeter of the fuselage gondola.


- Kaigun Kōkū Hombu should be reservations to both projects and after acceptance of the project the Kyushu J7W1 Shinden (18-Shi), both projects marked as "ground strike fighter, the 17-Shi Otsu" J4M1 Senden stopped, the company Mitsubishi has been invited to adjust your project A7M Reppu according to the requirements of the specification 17-Shi Otsu, which should be easier and more forward-looking development path. The allied intelligence service, retroactively to the project assigned code name Luke.


sources:
Tadeusz Januszewski and Kryzysztof Zalewski, Japońskie samoloty marynarski 1912-1945, volume 1., Lampart, year 2000, ISBN: 83-86776-50-1
Tadeusz Januszewski and Kryzysztof Zalewski, Japońskie samoloty marynarski 1912-1945, tiel 2, Lampart, 2000, ISBN 83-86776-00-05
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