Gasuden Kóken-Ki

Gasuden Koken-Ki / 航研機
     
Název:
Name:
Koken-Ki Koken-Ki
Originální název:
Original Name:
航研機
Kategorie:
Category:
experimentální letoun experimental aeroplane
Výrobce:
Producer:
DD.MM.1937-08.04.1937 Tokyo Gas and Electrical Industry Co., Ltd., Ōta /
Období výroby:
Production Period:
DD.12.1932-08.04.1937 vydání specifikací - dokončení stavby
Vyrobeno kusů:
Number of Produced:
1
První vzlet:
Maiden Flight:
25.05.1937
Osádka:
Crew:
3
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
Podvozek:
Undercarriage:
zatahovací retractable
Přistávací zařízení:
Landing Gear:
kola wheels
Technické údaje:
Technical Data:
 
Hmotnost prázdného letounu:
Empty Weight:
4225 kg 9315 lb
Vzletová hmotnost:
Take-off Weight:
9216 kg 20318 lb
Maximální vzletová hmotnost:
Maximum Take-off Weight:
? kg ? lb
Rozpětí:
Wingspan:
27,930 m 91ft 7,6in
Délka:
Length:
15,060 m 49ft 4,9in
Výška:
Height:
3,860 m 12ft 7,96in
Plocha křídla:
Wing Area:
87,30 m2 939.720 ft2
Plošné zatížení:
Wing Loading:
105,57 kg/m2 21.62 lb/ft2
Pohon:
Propulsion:
 
Kategorie:
Category:
pístový piston
Počet motorů:
Number of Engines:
1
Typ:
Type:
Kawasaki BMW VIII, vodou chlazený dvanáctiválec s válci do V o výkonu 526 kW (715 k).
Vrtule dvoulistá dřevěná s plechem potaženými vrtulovými listy, typ Sumitomo SW-4 o průměru 4 000 mm.
Kawasaki BMW VIII, twelve-cylinder water-cooled Vee engine, rated at 705 hp for take-off,
driving a two-blade Sumitomo SW-4 metal-covered wooden propeller of the diameter 13ft 1,5in.
Objem palivových nádrží:
Fuel Tank Capacity:
5 822 l 1,281 UK gallons
Výkony:
Performance:
 
Maximální rychlost:
Maximum Speed:
250 km/h v 0 m 155 mph in 0 ft
Cestovní rychlost:
Cruise Speed:
211 km/h v 2000 m 131.1 mph in 6562 ft
Rychlost stoupání:
Climb Rate:
? m/s ? ft/min
Čas výstupu na výšku:
Time to Climb to:
? min do ? m ? min to ? ft
Operační dostup:
Service Ceiling:
3410 m 11188 ft
Dolet:
Range:
11651,011 km 7239.6 mi
Maximální dolet:
Maximum Range:
12150 km 7549.7 mi
Výzbroj:
Armament:
žádná None
Uživatelské státy:
User States:
Poznámka:
Note:
航研機 - Kō-ken-ki


- Povrch křídla, které bylo potaženo plátnem z kvalitní egyptské bavlny, byl 11x lakován a leštěn, aby bylo dosaženo minimálního odporu vzduchu.
- Letoun byl držitelem rekordu v doletu, dne 15. 5. 1938 uletěl vzdálenost 11 651,011 km a zároveň získal rychlostní rekord, když uletěl 10 000 km rychlostí 186,192 km/h. Po letu zůstalo v nádržích ještě 500 l paliva, což zaručovalo ještě let dlouhý 1 200 km
- Rekordní let pilotoval mjr. Yuzo Fujita.
航研機 - Kō-ken-ki


The first two attempts at breaking the record, on 13 November 1937 and 10 May 1938 were unsuccessful, owing to undercarriage problems and an autopilot failure respectively.The Koken-Ki took off for a third attempt from Kisarazu, Chiba at 04:55 on 13 May 1938, flying a four sided course of 249 mi. After 29 laps of the circuit, at 19:21 on 15 May, it landed at Kisarazu, having flown a distance of 7,239 mi, a new World Closed-Circuit distance record. This record, which remains the only aviation record ever set by Japan that was recognised by the Fédération Aéronautique Internationale, the world governing body for aviation records, remained standing until August 1939, when it was broken by an Italian Savoia-Marchetti SM.82 which flew 8,038 mi.


The Koken-ki was used for occasional test flights, last flying in 1939, and survived World War II only to be burned following the end of the war.
Zdroje:
Sources:
Robert C. Mikesh and Shorzoe Abe, Japanese Aircraft, 1910-1941, Naval Institute Press, Putnam Aeronautical Books, London, 1990, pp. 90-91, ISBN: 1-55750-563-2
search.japantimes.co.jp
www.ne.jp
www.aviastar.org
www.tokyofreepress.com
archiv autora
URL : https://www.valka.cz/Gasuden-Koken-Ki-t31867#114991 Version : 0
Gasuden Koken – experimental aircraft with long range

History of the aircraft:

In the twenties and thirties of the last century, the air force sharply boomed and around the world were established new world records in all possible categories. Japan at that time very hard in order to enhance both components of its air force and invested heavily in the development of their industry, purchased the license, I tried with a foreign air technology, the japanese officers, engineers and technicians were on foreign internships, studied in prestigious universities, and Japan were welcome to join experienced aviation engineers with their teams. Early thirties already nazrála time, so also the Japanese empire joined the world of the quest for records.

In 1931, established close cooperation between the Researchers of the aviation institute and the Imperial university in Tokyo, the aim of this cooperation should be aircraft with very long range. The work should be financed by the Ministry of education. The project works were commenced in December 1932, when they were ordained head of the project. Research work conducted by dr. Koroku Wada, in collaboration with professor Keikichi Tanakou. Great attention has been paid to the design of the wing and the system fuel tank, fuel was carried in a total of fourteen tanks umístněných in the wings and its depletion during the flight did not affect the center of gravity of the aircraft. The fuselage was quite slender, and the pilot's seat it was possible after vzlétnutí retract into the hull so that the nevystupovalo over his outline. The chassis was retractable and after his retraction was obscured by aerodynamic covers.

In 1934 it was decided that the fuselage of the aircraft stand up a small company 東京瓦斯電気工業 - Tokyo Gasu Denki Kabushiki Kaisha (abbreviated as Gasuden), the engine should deliver motorářské department of the company 川崎航空工機業株式会社 - Kawasaki Kōkūki Kōgyō Kabushiki Kaisha, selected was a modified German engine BMW VIII. Work on the remote aircraft to proceed very slowly, for the japanese workers was also unusual all-metal construction of the aircraft and its smooth and polished surface. All parts have been completed 3. in march 1937, these manufactured parts were then transported to a large hangar at the airport in Hanedě, there was carried out the final assembly and final build of the aircraft, it is 8. April 1937.

The first years carried out major Yuzo fujita scale, the battalion Fukujiro Takahashi and flight engineer Chikakichi Sekine, all of the appointees were members of the Army aviation research institute in Tachikawa, this department had the task of ensuring the preparation for the record flight.
On the record flight took place 13. may 1938 in 4 hours and 55 minutes in the morning, the aircraft took off from a naval base in Kisarazu and flew in a quadrangle formed by the cities of Kisarazu, Choshi, Ohta and Hiratsuka, fly over this quadrangle meant to fly away a distance of 401, 759 km and the aircraft this quadrangle and flew around the 29x and the indoor pool so the distance 11 651, 011 km. A record flight was terminated 15. may in 19 hours 21 minutes, the net flight time was 62 hours 26 minutes, and in the fuel tanks remained almost 500 litres of fuel. Koken-Ki became the only japanese record-breaking machine, which received a certificate of the FAI.

The record of this aircraft has endured only fifteen months, in August 1939 he was overtaken by the Italian aircraft the Savoia Marchetti SM.82, this aircraft took over the imaginary baton to the new distance – 12 936 km.

Record machine Koken-Ki after the execution of the record-breaking flight made a few test long-haul flights, these flights were made in and directed the Army arzenála in Tachikawa.

Apparently last years was carried out in the spring of 1939, when Koken low encounter said goodbye to my pilot major Fujitou. Major died 1.February, 1939 in China, while returning from a combat mission he was forced to crash-land the bomber Fiat BR.20 (Army heavy bomber type 1 model 100) on the surface of the river Yangtze-jiang. Koken so survived his pilot for six years, but the end of the aircraft was not famous, after the surrender of Japan was destroyed and scrapped by american occupation forces along with many other japanese planes, it happened at the location of its final assembly - at the tokyo airport Haneda.

sources:
Robert C. Mikesh and Shorzoe Abe, Japanese Aircraft, 1910-1941, Naval Institute Press, Putnam Aeronautical Books, London, 1990, pp. 90-91, ISBN: 1-55750-563-2
www.ne.jp
www.aviastar.org
the archive of the author
.
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a několik fotografií
Gasuden Kóken-Ki -


Gasuden Kóken-Ki -


Gasuden Kóken-Ki -


Gasuden Kóken-Ki -


Gasuden Kóken-Ki -


URL : https://www.valka.cz/Gasuden-Koken-Ki-t31867#114994 Version : 0

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Kresba Kokenu za letu
Gasuden Kóken-Ki -


URL : https://www.valka.cz/Gasuden-Koken-Ki-t31867#114993 Version : 0
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