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Support aircraftIn service
Turboprop airliner
NAMC YS-11 is a turboprop airliner originating in Japan. It was built by Nihon Aircraft Manufacturing Corporation.
JapanTrue scale
Sourced dimensions beside a 1.75 m human reference.
Turboprop airliner
Japan
Nihon Aircraft Manufacturing Corporation
Three in service with the Japan Air Self-Defense Force (as of 30 June 2024)
182
1962–1974
30 March 1965, for All Nippon Airways (first passenger flight with Japan Air Commuter in 1965)
30 August 1962
2
64 passengers / 6,604 kg (14,559 lb)
26.3 m (86 ft 3 in)
32 m (105 ft 0 in)
8.98 m (29 ft 6 in)
94.83 m 2 (1,020.7 sq ft)
10.8
root: NACA 64A-218 ; tip: NACA 64A-412
15,396 kg (33,942 lb) operating weight, empty
24,500 kg (54,013 lb)
24,000 kg (52,911 lb)
2 × Rolls-Royce Dart Mk.542-10K turboprop engines, 2,250 kW (3,020 hp) each
4-bladed constant-speed fully-feathering reversible propellers
469 km/h (291 mph, 253 kn) maximum at 4,575 m (15,010 ft)
452 km/h (281 mph; 244 kn) at 6,100 m (20,013 ft)
140 km/h (87 mph, 76 kn) at MLW, flaps down
546 km/h (339 mph, 295 kn) below 4,695 m (15,404 ft)
2,110 km (1,310 mi, 1,140 nmi) max fuel without centre-section bag tanks, no reserves
6,982 m (22,907 ft)
2,740 m (8,990 ft)
6.2 m/s (1,220 ft/min)
258 kg/m 2 (53 lb/sq ft)
0.25 kW/kg (0.15 hp/lb)
1,110 m (3,642 ft)
660 m (2,165 ft) at MLW
The NAMC YS-11 is a turboprop airliner designed and built by the Nihon Aircraft Manufacturing Corporation (NAMC), a Japanese consortium.
NAMC designed a low-winged twin- turboprop -engined monoplane , capable of seating up to 60 passengers, dubbed the YS-11 . Amongst the design team was Jiro Horikoshi , who had previously been the designer of the famed wartime Mitsubishi A6M Zero fighter. Another prominent engineer on the project was Teruo Tojo, the second son of Prime Minister Hideki Tojo , who later became chairman of Mitsubishi Motors . The twin-engined YS-11 was projected as delivering similar operational performance to the four-engined British-built Vickers Viscount , while possessing 50% greater capacity than the similarly configured Dutch-built Fokker F27 Friendship . MITI supervised the pricing of the aircraft in order to ensure that it was competitive with the American-built Martin 4-0-4 .
Although the tentative aircraft was mainly designed and manufactured in Japan, the engine selected to power the airliner was the 2,275 kW (3,050 ehp) Rolls-Royce Dart RDa.10/1 powerplant, which was both developed and produced by British-based company Rolls-Royce . Furthermore, according to author Stephen C Mercado, due to the lack of available domestic technology at the time, several of the key aircraft systems, such as cabin pressurization , were copied from foreign sources; such information was gleaned from a combination of Japanese airlines, trading companies and diplomats. Throughout the YS-11's production lifetime, its electronic equipment, avionics, mechanical and fuselage components were supplied by a combination of Japanese companies and foreign suppliers.
In 2007, the YS-11 was added to the Mechanical Engineering Heritage of Japan as item number 13. As of 2014 , fifteen were operated by the Japanese military, and two in Mexico. As of 2017 , only eight remained in service with the Japan Air Self-Defense Force , which were being used for flight checks and other ancillary purposes. As of August 2020 , two aircraft remain in commercial service in South America and Africa. As of March 2021 , the Japan Air Self-Defense Force retired the YS-11 after 57 years of service.
Initial production variant. 23,500 kg (51,810 lb) gross weight. 48 built.
Increased gross weight (24,500 kg (54,010 lb) passenger airliner.
Passenger airliner with further increased (25,000 kg (55,110 lb)) gross weight produced from 1970.
JMSDF 2 YS-11M for Freighter 2 YS-11M-A for Freighter 6 YS-11T-A for MPA trainer
13 November 1966, All Nippon Airways Flight 533 crashed into the sea near Matsuyama , Japan with the loss of all five crew and 45 passengers.
20 October 1969, All Nippon Airways Flight 104 overran the runway at Miyazaki Airport , Japan. All four crew and 49 passengers survived.
11 December 1969, a Korean Air flight from Gangneung to Seoul was hijacked by a North Korean agent and flown to Sǒndǒk Airfield near Wonsan . The aircraft was damaged on landing and written off. The aircraft, its crew, and seven passengers are still held in North Korean territory.
12 August 1970, China Airlines Flight 206 crashed into Yuan Mountain on approach to Taipei , Taiwan . Two crew and 12 passengers were killed.
3 July 1971, Toa Domestic Airlines Flight 63 flew into Yokotsu Mountain while on approach to Hakodate Airport , Japan. All four crew and 64 passengers were killed, the worst loss of life in an accident involving the YS-11.
12 April 1972, a VASP flight between São Paulo and Rio de Janeiro crashed 50 kilometres (31 mi) north of Rio de Janeiro. All four crew and 21 passengers were killed.
21 October 1972, Olympic Airways Flight 506 en route from Corfu (Kerkyra) to Athens crashed into the sea in Voula whilst attempting an approach to Ellinikon International Airport , Athens , in a heavy storm. One crew member (the co-pilot) and 36 passengers were killed, while the captain, the two stewardesses and 16 passengers survived.
23 October 1973, a VASP YS-11 overran the runway at Santos Dumont Airport , Rio de Janeiro after a rejected take-off and ended up in Guanabara Bay . Eight passengers were killed.
5 March 1974, a Pacific Southwest Airlines YS-11 crash landed in the desert 14 kilometres (8.7 mi) east of Borrego Springs , California while on a training flight. Aircraft was written off.
23 November 1976, Olympic Airways Flight 830 flew into Mount Metaxas near the village of Servia in Kozani , Greece, in low clouds and almost zero visibility. All four crew and 46 passengers were killed.
28 September 2009, Japanese Maritime Self-Defense Force YS-11M-A serial number 9044 overran the runway upon landing at Ozuki Air Field and was substantially damaged.
Capacity: 64 passengers / 6,604 kg (14,559 lb)
Length: 26.3 m (86 ft 3 in)
Wingspan: 32 m (105 ft 0 in)
Height: 8.98 m (29 ft 6 in)
Wing area: 94.83 m 2 (1,020.7 sq ft)
Empty weight: 15,396 kg (33,942 lb) operating weight, empty
Max takeoff weight: 24,500 kg (54,013 lb)
Maximum landing weight: 24,000 kg (52,911 lb)
Powerplant: 2 × Rolls-Royce Dart Mk.542-10K turboprop engines, 2,250 kW (3,020 hp) each
Cruise speed: 469 km/h (291 mph, 253 kn) maximum at 4,575 m (15,010 ft)
Economical cruising speed: 452 km/h (281 mph; 244 kn) at 6,100 m (20,013 ft)
Stall speed: 140 km/h (87 mph, 76 kn) at MLW, flaps down
Never exceed speed : 546 km/h (339 mph, 295 kn) below 4,695 m (15,404 ft)
Mach 0.601 above 4,695 m (15,404 ft)
Range: 2,110 km (1,310 mi, 1,140 nmi) max fuel without centre-section bag tanks, no reserves
1,090 km (680 mi; 590 nmi) with max payload, no reserves 3,215 km (1,998 mi; 1,736 nmi) max fuel with centre-section bag tanks, no reserves
Service ceiling: 6,982 m (22,907 ft)
Service ceiling, one engine: 2,740 m (8,990 ft)
Rate of climb: 6.2 m/s (1,220 ft/min)
Take-off distance to 10 m (33 ft): 1,110 m (3,642 ft)
Landing distance from 15 m (49 ft): 660 m (2,165 ft) at MLW
Reference text from Wikipedia contributors, used under CC BY-SA 4.0.
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