Wing D-1 Derringer
By 1962, George Wing had moved on to the develop-ment of John Thorp’s little twin, which eventually became the Wing Derringer. George Wing hired John Thorp to design a high-perform-ance two-seat twin. Thorp, who had been toy-ing with the idea of hanging two engines on his Sky Skooter (one of which Wing owned), was already primed for the idea. They started with a clean sheet of paper and, using two Continental O-200 engines and fixed-pitch props, came up with an airplane that was, for its operating costs, a wonderful performer, first built in 1978. John E Robey designed the major assembly tooling for the Wing Derringer at Olin-Dixon in Coffeyville Ks in the late 1960's. It kept throwing prop blades, however, its engine-out performance was inadequate, and the tweaked engines were not a realistic choice for a production airplane; and so eventually, production prototypes were equipped with 160-hp Lycoming engines.
The airplane was a com-pact two-seater with a huge baggage bay be-hind the seats, a simple rectangular wing and a fuselage that was all curves from nose to tail. Its structure used stretched chem-milled-skins throughout. It would cruise at 190 knots, climbing at 1,700 fpm and boasting a range of over 1,000 nm with reserves.
Wing spent $3 million of his own money, $5 million all told, in developing and certificat-ing the airplane.
Wing contracted with a Kansas man-ufacturing firm, Olin Dixon, to manufacture the airplane. Problems developed, which Olin blamed on Wing and Wing blamed on Olin. Litigation followed.
In 1979 Wing Aircraft's two-seat Derringer twin seemed to be on the verge of entering the general aviation marketplace. Company President George Wing says that the first production Derringer will be delivered in the fall. The aircraft, which is powered by two 160-horsepower Lycomings, has a book cruise speed of 182 knots at 65-percent power. Sea-level rate of climb is 1,700 feet per minute, and the empty weight is 2,100 pounds. An IFR-equipped Derringer was to sell for about $100,000.
Engine: 2 x Lycoming O-320-B1C, 160 hp
TBO: 2000 hrs
Prop: Hartzell, 2 blade, variable pitch 66 in
Length: 23 ft
Height: 5.8 ft
Wingspan: 29.1 ft
Wing area: 121 sq.ft
Wing aspect ratio: 7
Max ramp wt: 3050 lbs
Max take off wt: 3050 lb
Standard empty wt: 2100 lb
Max useful load: 950 lb
Max landing wt: 2900 lb
Wing loading: 25.2 lbs/sq.ft
Power loading: 9.5 lbs/hp
Max useable fuel: 522 lb
Climb rate: 1700 fpm @ 104 kt
Climb gradient: 981 ft/nm
Rate of climb @ 8000 ft: 1015 fpm
Service ceiling; 19,600 ft
SE climb rate: 420 fpm @ 96 kts
SE climb gradient: 263 ft/nm
SE ceiling: 8,000 ft
Max speed: 202 kt
Cruise @ 65% power @ 8,000ft: 182 kt
Fuel flow @ 65% power @ 8,000ft: 95 pph
Endurance @ 65% power @ 8,000ft: 5.2 hr
Stalling speed clean: 70 kt
Stall speed gear/flaps down: 63 kt
Turbulent air penetration speed: 148 kt