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Aviation History
1983
1983 - 0430.PDF
BUSINESS AVIATION "Flying pick-up truck" takes off A new aircraft based upon Cessna's 337 Skymaster has entered the utility "flying pick-up truck" market. Spec trum Aviation has produced the SA-550 Spectrum-One, which first flew on February 1. The nose engine of the orig inal Cessna push-and-pull configuration has been dispensed with, and the rear engine is replaced by a Pratt & Whitney PT6A-27 driving a reversible-pitch Hartzell propeller. The new project's potential roles include cargo, ambulance, surveillance, commuter, and mixed oper ations. A longer fuselage gives a flat floor for cargo up to 19ft long. Spectrum Aircraft (7120 Hayvenhurst Avenue, Van Nuys Airport, California 91406; telephone (213) 782-2680) has designed the aircraft for low-cost, easy loading, and reliable and easily maintainable short- field performance. It is said to take off in less than 450ft (675ft to clear 50ft) with a full 2,2001b payload, and to land in 675ft at sea level over a 50ft obstacle. 646 To provide the length needed to balance the loss of forward-engine weight, the fuselage is extended ahead of the wing spar. The new nose section is longer than the standard original, being stretched forward of the wind screen, and tailbooms are also extended. A nose door allows very long items to be loaded from the front. The parallel cabin section between wing spar and windscreen accom modates a large three-piece cargo door on the starboard side. Basic data: SA-550 Spectrum-One* DIMENSIONS—External: wing span 38ft 2in; length 36ft 10in; height 9ft 2in. Internal: cargo floor: 19ft (max); cargo door 3ft 7in high x 5ft Oin wide; sill height 2ft 1 in, volume 206ft3; capacity 2.2001b. PERFORMANCE: "top" speed (at 15,000ft) 250 m.p.h.; max cruise 250 m.p.h.; stall speed (at max weight) 82 m.p.h. (flaps up, power off), 66 m.p.h. (flaps down, power off); take off (at max weight) 445ft; rate of climb (at max weight) 1,600ft/min; landing (reverse thrust, weight not given) sea level 1,395ft, 675ft over 50ft obstacle; at 10,000ft 625ft, 1,180ft over 50ft obstacle. WEIGHTS: max take-off/landing 4,800lb; useful load 2,200lb; fuel capacity 125 US gal (185 US gal optional); consumption 34 US gal/hr. RANGE: (840lb fuel, no reserve, at 10,000ft, 240 m.p.h.) 900 statute miles, 1,360 statute miles (optional fuel). POWERPLANT: Pratt & Whitney PT6A-27 flat-rated at 550 s.h.p. 'Projected performance specifications. FLIGHT International, 12 March 1983
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