[ Ссылка ] -- The Robertson B1-RD was designed by Glen Bashforth and Bruce Bashforth and manufactured Robertson Aircraft. The B1 RD entered the market in the early 80's and was supplied as a kit which could be built as an ultralight or experimental aircraft.
The aircraft was designed to fit US FAR 103 Ultralight Vehicles rules of a maximum empty weight of 254 lb, 5 gallons of fuel and a top speed of 65 mph. The B1 RD kit used bolt together aluminum construction covered in dacron sail cloth. It is a high wing, tractor configuration aircraft and at the time was powered by either a Cayuna 440 or a Rotax 377/447/503 using a belt reduction drive of 3 to 1, spinning an enormous propeller.
The B1RD is a tail dragger, with a steerable trailwheel. Controls were standard three axis control with junker style ailerons. It was available in both single seat and two seat versions - the two seater used for training.
Production ceased in 1984 because the parent company was concerned about the liability aspect of ultralight aviation.
Specifications for single seat B1-RD
Crew: one
Wingspan: 32 ft 0 in (9.75 m)
Wing area: 162 sq ft (15.1 m2)
Empty weight: 220 lb (100 kg)
Gross weight: 500 lb (227 kg)
Fuel capacity: 4 U.S. gallons (15 L; 3.3 imp gal)
Powerplant: Cuyuna 430R two-cylinder, Rotax 377/447/503
Performance figures for single place B1 RD
Maximum speed: 50 mph (80 km/h; 43 kn)
Cruise speed: 38 mph (33 kn; 61 km/h)
Stall speed: 15 mph (13 kn; 24 km/h)
Never exceed speed: 75 mph (65 kn; 121 km/h)
Range: 125 mi (109 nmi; 201 km)
Service ceiling: 14,000 ft (4,267 m)
G limits: +3/-2
Maximum glide ratio: 8.5:1
Rate of climb: 850 ft/min (4.3 m/s)
Rate of sink: 300 ft/min (1.5 m/s)
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[ Ссылка ] - B1-RD, Robertson Aircraft's B1 RD ultralight or experimental aircraft.
