Quiz n°1 [RISOLTO]

Taglia · 22 Ottobre 2006

Che cos'è, di che periodo e di che nazione? :contratto:

Giano · 22 Ottobre 2006

a me sembra molto il prototipo di elicottero dei giapponesi (KA-Go autogyro o Kayaba KA-GO) purtroppo non riesco bene a leggere il nome sull'immagine...

Driant · 22 Ottobre 2006

non e' tedesco?

GyJeX · 22 Ottobre 2006

no è proprio giapponese, il primo elicottero ASW della storia

GyJeX · 22 Ottobre 2006

Rivoglio il Tasto "modifica"!!

Ho estrapolato queste due foto da un pdf, dovrebbero far parte di un video... magari trovarlo...

Taglia · 22 Ottobre 2006

Vince Giano al primo colpo :contratto:

Ecco maggiori dettagli (in inglese):

[SIZE=+3][SIZE=+1] Kayaba Ka-1 helicopter [/SIZE][/SIZE]

[SIZE=+3][SIZE=+1]
[/SIZE][/SIZE] Although relatively unknown the Kayaba Ka-1 autogyro deserves a special place in aviation history since it was the first armed autogyro/helicopter to have been used operationally.
In the late 1930s the Imperial Japanese Army began to show considerable interest in the use of the autogyro as an artillery spotter and in 1939 a Kellet KD-1A single engined two seat autogyro was imported from the United States. Powered by a 225hp Jacobs L-4M4 seven-cylinder air cooled radial engine, the KD-1A featured an advanced version of the Kellet direct control rotor system. Unfortunately, shortly after its arrival in Japan, the aircraft was seriously damaged during the flight trials at low speeds. The Kellet KD-1A had been damaged beyond repair, but the Japanese Army delivered the wreck to K.K. Kayaba Seisakusho, a small company doing autogyro research, with instructions to develop a similar machine.

The Kayaba engineering team developed a two seat observation autogyro based on the KD-1A modified to Japanese production standards. Designated Ka-1, it was powered by a Kobe built Argus 240hp As 10c eight cylinder inverted vee air cooled engine driving a two blade propeller and a three bladed rotor. Completed in May 1941 the maiden flight took place on May 26, 1941. During its flight test program, the Ka-1 performed remarkably well demonstrating its ability to take off after running on 98 ft (30m) in still air. By running the engine at full power and holding the nose 15 degrees up, the Ka-1 could hover and could also execute a full 360 degree turn while hovering. As maintenance in the field appeared to present less difficulty than anticipated, the Ka-1 was placed in production for service with artillery units.
When shipping losses began to mount alarmingly, the Japanese Army commissioned the Akitsu Maru, a converted merchant ship, as a light escort carrier. As the short take off characteristics of the Ka-1 rendered it suitable for operation from this small vessel, a small number of Ka-1s were converted to act as anti-submarine patrol aircraft. As the load carrying capability of the two-seat Ka-1 was too limited, the carrier borne conversions were operated as single seat machines carrying two 132lb (60kg) depth charges. In this role the Ka-1s operated over Japanese coastal waters, particularly over the Tsugara and Korean channels. One Ka-1 was tested as the Ka-1 KAI with powder rockets on the rotor tips to try and improve the load carrying capability while another aircraft was converted to the Ka-2 using a 240hp Jacobs L-2MA-7 seven cylinder air cooled radial engine.

Specifications:
Powerplant: One 240hp Argus As 10c eight cylinder inverted vee engine driving a two bladed propeller and a three bladed rotor
Length: 30ft 2 7/32 inches (9.2m)
Rotor diameter: 40ft 5/16in (12.2m)
Weight - empty: 1,709 lbs (775 kg)
Weight - loaded: 2,579 lbs (1,170 kg)
Maximum speed: 102.5mph (165 kmh)
Cruising speed: 71.5mph (115 kmh)
Climb to 3,280ft (1000m): 3 minutes 20 seconds
Climb to 6,560ft (2000m): 7 minutes 30 seconds
Service ceiling: 11,485 feet (3,500m)
Range: 174 miles (280 km)
Crew: 2 (pilot and observer in tandem open cockpits)
Armament: 2 x 132lb (60kg) depth charges
Production: Approximately 240 x Ka-1s including 1 Ka-1KAI and 1 Ka-2 conversion
JDG
Sources:
Rene Francillion, Japanese Aircraft of the Pacific War, Naval Institute Press, 2000.
[SIZE=+3][SIZE=+1]Elke Weale, Combat Aircraft of World War Two, Bracken Books, 1985. [/SIZE][/SIZE]
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Quiz n°1 [RISOLTO]

Taglia

Files Allegati:

abcd.gif

Giano

Files Allegati:

Ka-Go Autogyro.jpg

Driant

GyJeX

GyJeX

Files Allegati:

kayaba1.jpg

kayaba2.jpg

Taglia

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