Top speed 610 km/h Wingspan 12 m Length 11 m First flight May 15, 1943 | Range 5,300 km Cruise speed 390 km/h | |
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Nakajima c6n1 saiun
The Nakajima C6N Saiun (彩雲, "Iridescent Cloud") was a carrier-based reconnaissance aircraft used by the Imperial Japanese Navy Air Service in World War II. Advanced for its time, it was the fastest carrier-based aircraft put into service by Japan during the war. The Allied reporting name was Myrt.
Contents
- Nakajima c6n1 saiun
- Development and design
- Operational history
- Variants
- Operators
- Specifications C6N1
- References
Development and design
The C6N originated from a 1942 Imperial Japanese Navy specification for a carrier-based reconnaissance plane with a top speed of 350 knots (650 km/h) at 6,000 m and range of 2,500 Nautical miles (4,960 km). Nakajima's initial proposal, designated N-50, was for a craft with two 1,000 hp engines housed in tandem in the fuselage, driving two propellers mounted on the wings. With the development of the 2,000 hp class Nakajima Homare engine though, this configuration was abandoned and Nakajima decided on a more conventional single-engine layout. However, the Homare's output turned out to be less than initially expected, so the design had to be optimized in other areas. The resulting aircraft was designed around a long and extremely narrow cylindrical fuselage, just large enough in diameter to accommodate the engine. The crew of three sat in tandem under a single canopy, while equipment was similarly arranged in a line along the fuselage. The C6N's low mounted laminar flow wing housed fuel tanks and was fitted with both Fowler and slit flaps and leading edge slats to lower the aircraft's landing speed to ease use aboard aircraft carriers. Like Nakajima's earlier B6N "Tenzan" torpedo bomber, the rudder was angled slightly forward to enable tighter packing on aircraft carriers.
The first flight was on 15 May 1943, with the prototype demonstrating a speed of 639 km/h (345 kt, 397 mph). Performance of the Homare engine was disappointing, especially power at altitude, and a series of 18 further prototypes and pre-production aircraft were built, before the Sauin was finally ordered into production in February 1944.
Operational history
Although designed for carrier use, by the time it entered service in September 1944, there were few carriers left for it to operate from, so most were used from land bases. Its speed was exemplified by a famous telegraph sent after a successful mission: "No Grummans can catch us." ("我に追いつくグラマンなし"). The top speed of the Hellcat was indeed of the same level, so overtaking a Saiun was out of the question.
A total of 463 aircraft were produced. A single prototype of a turbocharged development mounting a 4-blade propeller was built; this was called the C6N2 Saiun-kai. A night-fighter version C6N1-S with oblique-firing (Schräge Musik configuration) single 30 mm (or dual 20 mm) cannon and a torpedo carrying C6N1-B were also developed. The C6N1-B developed by Nakajima was not needed after Japan's aircraft carriers were destroyed. As Allied bombers came within reach of the Japanese home islands, there became a need for a first class night fighter. This led Nakajima to develop the C6N1-S by removing the observer and replacing him with two 20mm cannons. The C6N1-S's effectiveness was hampered by the lack of air-to-air radar, although it was fast enough to enjoy almost complete immunity from interception by Allied fighters.
Despite its speed and performance, on 15 August 1945, a C6N1 was the last aircraft to be shot down in World War II. Just five minutes later, the war was over and all Japanese aircraft were grounded.
Variants
Operators
Specifications (C6N1)
Data from Japanese Aircraft of the Pacific War
General characteristics
Performance
Armament