Convair 990 Coronado

Announced on 30 July 1958, the 990 (formerly known as the Convair 600) was developed from the Model 880 to meet the specific requirements of American Airlines and was given a longer fuselage and turbofan engines. The first Coronado flew on 24 January 1961. As a result of early testing, Krueger leading-edge flaps were added between the fuselage and the inner engines to increase elevator effectiveness and the outer engine pods were moved rearward to ensure speedier subsidence of vibration induced during test flying. The first 990 delivery was made to American Airlines on 8 January 1962, passenger services beginning on 18 March. In February 1962 the company completed a speed and range/payload improvement programme for the 990 which led to the redesignation 990A. All aircraft in service were modified to 990A standard, with engine pods extended rearwards to reduce external drag; reduced droop on the wing leading-edge; full-span Krueger flaps in place of the former combination of flaps and slats; and a new fairing at the wing-fuselage juncture. By 1977 the last of the original operators had withdrawn their airliners from service.

3-View

A three-view drawing (1360 x 670)