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Kawasaki Ki 88

Kawasaki Ki-88 / 川崎 キ88・试作防空战斗机

    Kawasaki Ki-88 Kawasaki Ki-88
    Originální název:
    Original Name:
    stíhací letoun fighter aeroplane
    Kawasaki Aircraft, Ltd., Kakamigahara /
    Období výroby:
    Production Period:
    Vyrobeno kusů:
    Number of Produced:
    První vzlet:
    Maiden Flight:
    DD.MM.RRRR pouze dřevěná maketa v plné velikosti /
    only wooden a full-scale mock-up
    Základní charakteristika:
    Basic Characteristics:
    Vzlet a přistání:
    Take-off and Landing:
    CTOL - konvenční vzlet a přistání CTOL - conventional take-off and landing
    Uspořádání křídla:
    Arrangement of Wing:
    jednoplošník monoplane
    Uspořádání letounu:
    Aircraft Concept:
    klasické conventional
    zatahovací retractable
    Přistávací zařízení:
    Landing Gear:
    kola wheels
    Technické údaje:
    Technical Data:
    Hmotnost prázdného letounu:
    Empty Weight:
    2950 kg 6504 lb
    Vzletová hmotnost:
    Take-off Weight:
    3900 kg 8598 lb
    Maximální vzletová hmotnost:
    Maximum Take-off Weight:
    ? kg ? lb
    12,400 m 40ft 8,18in
    10,200 m 33ft 5,56in
    4,150 m 13ft 7,38in
    Plocha křídla:
    Wing Area:
    25,00 m2 269.1 ft2
    Plošné zatížení:
    Wing Loading:
    156,0 kg/m2 31.95 lb/ft2
    pístový piston
    Počet motorů:
    Number of Engines:
    Kawasaki Ha-140 kapalinou chlazený inverní dvanáctiválec s válci do V o vzletovém výkonu 1 103 kW (1 500 k),
    výkon 919 kW (1 250 k) při 2 650 ot./min v h= 5 700 m
    Vrtule: trojlistá s konstantní rychlostí otáček o průměru 3 200 mm
    Kawasaki Ha-140 twelve-cylinder inverted vee liquid-cooled engine, rated at 1,479 hp for take-off and 1,233 hp at 2,650 rpm at 18,700 ft,
    driving a theere-blade constant-speed propeller of in 10ft 6in diameter.
    Objem palivových nádrží:
    Fuel Tank Capacity:
    ? ?
    Maximální rychlost:
    Maximum Speed:
    600 km/h v 6000 m 372.8 mph in 19685 ft
    Cestovní rychlost:
    Cruise Speed:
    457 km/h v 5700 m 284 mph in 18701 ft
    Rychlost stoupání:
    Climb Rate:
    ? m/s ? ft/min
    Čas výstupu na výšku:
    Time to Climb to:
    6,50 min do 5000 m 6,50 min to 16404 ft
    Operační dostup:
    Service Ceiling:
    11000 m 36089 ft
    1200 km 745.6 mi
    Maximální dolet:
    Maximum Range:
    1500 km 932.1 mi
    1x kanón Ho-203 ráže 37 mm v ose vrtule
    2x kanón Ho-5 ráže 20 mm v křídlech
    One fixed forward-firing 1.46 in Ho-203 cannon firing through the center of the propeller with 25 rounds of HE rounds and
    two foxed forward-firing 0.79 in Ho-5 cannons mounted in the nose with 120 rpg.
    Uživatelské státy:
    User States:
    - -
    Projekt tohoto letounu byl zřejmě inspirován americkou stíhačkou Bell P-39 Airacobra. Konstruktéři vypočítali, že by jejich letoun měl dosahovat ve výšce 6 000 m rychlosti 600 km/h. Byla vyrobena pouze dřevěná maketa ve skutečné velikosti. Práce byly ukončeny v druhé polovině roku 1943, když této rychlosti s týmž motorem dosáhl sériový stíhač Kawasaki Ki-61-IIa Hein. The Kawasaki Ki-88 was a design for a fighter aircraft inspired by the Bell P-39 Airacobra. Work on the Ki-88 began in August 1942, and by 1943 a full-scale mock-up had been completed. Calculations suggested that it would have a top speed of 373mph at 19,685ft, no great improvement on that of the Kawasaki Ki-61 Hien, and so the project was abandoned during 1943.
    Rene J. Francillion Ph.D, Japanese Aircraft of the Pacific War, Naval Institute Press, rok 1987, ISBN-13: 978-0870213137
    Enzo Angelucci, Paolo Matricardi a Pierluigi Pinto, World War II Combat Aircraft, Whitestar Publisher, rok 2001, ISBN: 8880956884
    Václav Němeček, Vojenská letadla 3 díl, druhé doplněné vydání, Naše Vojsko, Praha 1992, ISBN 80-206-0117-1
    Famous Airplanes of the World, Army Experimental Fighters, No.24, Bunrindo Co-Ltd., Nakano Koku, Japan
    archiv autora
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    Kawasaki Ki-88

    川崎 キ88・试作防空战斗机

    Allied reporting name: not allocated

    大日本帝国陸軍航空本部 - Dai-Nippon Teikoku Rikugun Kōkū Hombu (Imperial army air force) acquired in August of 1942 the first intelligence information about the upcoming american high-altitude bomber, the Boeing B-29 Superfortress, at the same time realizing that does not have a suitable fighter aircraft, the aircraft detained. Immediately they were assembled new requirements for single-engine and twin engine interceptors, which should protect important objectives on the parent islands. Specifications with these requirements were forwarded to the manufacturers of aviation equipment and will soon have been processed, the first studies and projects that have been Rikugun Kōkū Hombu submitted for consideration.

    One of these projects was the project interesting, solved the overflow of fighter jets from the company 川崎航空工機業株式会社 - Kawasaki Kōkūki Kōgyō Kabushiki Kaisha (hereinafter Kawasaki) was the project engineer Takea Tsuchiho. The project got the the system of marking of army aircraft Kitai designation of the Ki-88. Technical officers in the air force, the project assessed and approved, was ordered the construction of wooden models in real size and at the same time was a Kawasaki issued the instruction to prepare for the construction of prototypes.

    Designer Takeo Tsuchi, to comply with the requirements of the army air force, had to use what may be the most powerful drive unit, the time motoráři Kawasaki at Akashi were finalizing the engine Ha-140. It was the own development of the original German engine DB-601Aa, in which the Japanese drove out the performance of up to 1 500 horsepower. The Ha-140, however, failed, as it turned out, was very little reliable, but for this case, we can features of this engine completely disregard. Another requirement was a strong and effective armament, which was to secure the destruction of the čtyřmotorového bomber. The necessary firepower to guarantee sedmatřicetimilimetrový cannon Ho-203, which in the bow should complement the pair of dvacetimilimetrových cannon Him-5. Here, apparently, the designers ran into a problem, where to place cannon on the weight of 88.9 kg and with a length of 1 530 mm, so they probably were inspired by the american Airacobrou (Bell P-39), certainly, but not a copy of the american machine. Takeo Tsuchi actually around cannon Ho-203 built aircraft, the engine was stored in the center of gravity of the airplane behind the cockpit, the propeller was driven by a long shaft and this is the long shaft was imposed on the gun barrel. This problem has previously solved the chief designer Airacobry Robert J. Woods. The fact that the engine was in the bow, could be appropriately aerodynamically designed and at the same time, there was even enough room for both cannons Ho-5. Another impetus for approval of the project Ki-88 was the design speed of the airplane the Kawasaki Ki-64, its development, however, was complex and lengthy. Rikugun Kōkū Hombu was completely justified reservations to the applied surface cooling and also the development of a complex power unit for the Ki-64 is constantly flexing. The project Ki-88 was easier to manufacture and from the point of view of the operational deployment would have been much more appropriate, as there was not provided with surface cooling. Aircraft Kawasaki Ki-88 was supposed to form a stable platform, which carried effective weapons. Unlike Airacobry had a Ki-88 classic landing gear with tail wheel. The question is whether it should be the engine of the Ha-140 on this plane přeplňován compressor, which is mentioned e.g. here: In my opinion, with the engines at that time didn't count, the engine was in the then still neodladěný, maybe there were considerations that would be in the future this engine this way přeplňovat, but probably not have happened.

    Work on the wooden mockup has continued, according to the wishes of the Rikugun Kōkū Hombu was also a preparation for the construction of the prototypes developed were the dragons of the aircraft and is tentatively anticipated with the completion of the first prototype at the end of October 1943, unfortunately for the Ki-88, the faster he completed the prototype of a fighter Ki-61-II, which is using the same engine promised better results, but above all, he was available immediately, because Kawasaki Ki-61-I had previously produced, in contrast, it was possible for the Ki-88 count with childhood diseases and a much longer development. It was eventually the main reason why Rikugun Kōkū Hombu whole project stopped and ended.

    Rene J. Francillion Ph.D., Japanese Aircraft of the Pacific War, Naval Institute Press, rok 1987, ISBN-13: 978-0870213137
    Enzo Angelucci, Paolo Matricardi, and Pierluigi Pinto, World War II Combat Aircraft, Whitestar Publisher, 2001, ISBN: 8880956884
    Vaclav Nemecek, Military aircraft 3 part, the second supplemented edition, Our Troops, Prague 1992, ISBN 80-206-0117-1
    Famous Airplanes of the World, Army Experimental Fighters, Well.24, Bunrindo Co-Ltd., Nakano Koku, Japan
    author archive
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    Trojpohledový sketch
    study the Ki-88 in-flight
    photos from the production of a wooden mock-ups of the fighter plane Kawasaki Ki-88.

    Unfortunately I don't have anything better.

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