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Convair 990 Coronado "1961

The B-36 was under development in 1941 and first flew on August 8, 1946. The first operational models were delivered to SAC in 1948, but due to early problems the B-36 units were not fully operational until 1951. The B-36 cost $3.6 million each. It had a 3,740-nm combat radius with a 10,000-pound payload, or a 1,757-nm radius with a maximum bomb load of 86,000 pounds. The last B-36 was built in August 1954, for a total production of 388 aircraft. The B-36 force was modernized with the advent of the long range B-52. On 29 June 1955 the first B-52 was delivered to SAC. At that time there were 340 of the B-36s assigned

Convair 990 Coronado "1961

Role Narrow-body jet airliner
National origin United States
Manufacturer Convair
First flight January 24, 1961
Introduction 1962
Retired September, 1987 (1994 with NASA)
Primary users American Airlines / Spantax / Swissair
Produced 1961-1963
Number built 37
Developed from Convair 880

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Convair F-102 Delta Dagger (1953) – Convair B-58 Hustler (1956) – Convair F-106 Delta Dart (1956) –
Convair 880 (1959) – Convair 990 Coronado (1961) – Vultee BT-13 Valiant – Vultee A-13 Vengeance

 

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Convair
990 Coronado "1961

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Convair
990 Coronado "1961

The Convair 990 Coronado is an American narrow-body four-engined jet airliner produced by the Convair division of General Dynamics, a stretched version of their earlier Convair 880 produced in response to a request from American Airlines. The 990 was lengthened by 10 ft (3.0 m), which increased the number of passengers from between 88 and 110 in the 880 to between 96 and 121 in the 990. This was still fewer passengers than the contemporary Boeing 707 (110 to 189) or Douglas DC-8 (105 to 173), although the 990 was 25–35 mph (40–56 km/h) faster than either in cruise.

Design

The 990 did not meet the specifications promised, and American Airlines reduced their order as a result. The 990A was developed by adding fairings to the engine nacelles, among other changes Despite the modifications from the basic 880 and those in response to drag problems in testing, the aircraft never lived up to its promise of coast-to-coast nonstop capability from JFK to LAX. American Airlines’ timetables show little or no difference in scheduled time between 707 and 990A flights;[ AA began to dispose of their 990As in 1967

During May 1961, one of the pre-production 990 prototype aircraft, while demonstrating the margin between its operating speed and its capability, during a dive at .97 Mach from 32,000 ft to 22,500 ft, reached 675 miles per hour (1,086 km/h) at an altitude of 22,000 feet (6.7 km), the fastest true airspeed ever attained by a commercial jet transport at that time.

Operators

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Convair 990 Coronado (1961)

 
Swissair CV990A Coronado “St Gallen” at Manchester Airport in 1964
 

Swissair bought eight 990As beginning in 1962, operating them on long-distance routes to South America, West Africa, the Middle and Far East, as well as on European routes with heavy traffic. Their fleet was withdrawn from service in 1975. Scandinavian Airlines also operated Coronados on their long-haul schedules to Tokyo and other destinations in the Far East.

Specifications

Crew: 4 (+ cabin crew)

    • Capacity: up to 149 passengers
    • Length: 139 ft 9 in (42.60 m)
    • Wingspan: 120 ft (37 m)
    • Height: 39 ft 6 in (12.04 m)
    • Empty weight: 133,000 lb (60,328 kg))
    • Max takeoff weight: 253,000 lb (114,759 kg)
    • Maximum landing weight: 202,000 lb (91,626 kg)
    • Powerplant: 4 × General Electric CJ805-23B turbofan engines.
  • Maximum speed: 540 kn (620 mph, 1,000 km/h) at 20,000 ft (6,096 m) at 200,000 lb (90,718 kg) AUW
  • Maximum speed: Mach 0.871
  • Cruise speed: 484 kn (557 mph, 896 km/h) / M0.84 at 35,000 ft (10,668 m)
  • Range: 3,302 nmi (3,800 mi, 6,115 km) with 104,373 lb (47,343 kg) 
  • Service ceiling: 41,000 ft (12,000 m)
  • Take-off run: 9,800 ft (2,987 m) at MTOW (SR-422B Field length)
  • Landing run: 5,400 ft (1,646 m) at 170,000 lb (77,111 kg) 

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American Airlines asked Convair to design an aircraft for coast-to-coast flights, able to fly nonstop from New York City to Los Angeles against the wind. They wanted a somewhat larger passenger capacity than the 880, which was the smallest of the first-generation U.S. jet airliners. The 990 began flight testing January 24, 1961

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