British Aircraft Company Drone

Drone

1936-built BAC Super Drone G-AEDB at Duxford Aerodrome in April 1982
Role	Ultralight aircraft
National origin	United Kingdom
Manufacturer	British Aircraft Company
Designer	C.H Lowe Wylde
First flight	1932
Number built	33
Unit cost	£325 (Drone de Luxe)^[1]

The B.A.C. Drone was a British ultralight aircraft of the 1930s.

Design

During the early 1930s, the British Aircraft Company of Maidstone, Kent built a series of gliders culminating in the B.A.C. VII tandem two-seater. In 1932 the firm fitted a 600 c.c. Douglas motorcycle engine above the high wing on a steel tube pylon. It flew as a single-seater, and was known as the B.A.C. Planette. On 13 May 1933, the designer C.H. Lowe Wylde was killed in a crash of the first Planette at West Malling. The firm was then taken over by Robert Kronfeld who modified the second Planette with a streamlined pylon, and renamed the design the Drone.^[2]

Production

Premises nearer London were acquired in 1935 at London Air Park, Hanworth, in Middlesex, and production of the single-seat aircraft commenced there. In 1936, the company was renamed Kronfeld Ltd, and 20 Drones were built during the year. Aircraft fitted with the 23 hp (17 kW) Douglas Sprite engine became known as the Kronfeld Super Drone. A version with a 30 hp (22 kW) water-cooled Carden-Ford converted car engine and swept wings was known as the Drone de Luxe. The firm closed down in 1937, after 33 Drones had been completed.^[2]

The Drone became popular with private owners. Col. the Master of Sempill startled the aviation world in April 1936, when he flew Drone G-ADPJ from Croydon Airport to Berlin in 11 hours flying time on 14 gallons of petrol. The return took him nine hours.^[3] Two Drones flew over 40,000 miles with C.W.A. Scott's air display team. During the Second World War, a camouflaged Drone de Luxe was unofficially flown by pilots of No. 609 Squadron on duck-shooting sorties using a 12-bore shot gun and a ring-and-bead sight.^[2]

Survivors

Eight Drones survived the Second World War, and three of those flew again. Three Drones remained extant in 2006, including the sole surviving Kronfeld Drone de Luxe, G-AEKV, which last flew in 1984 and is now preserved in ground running condition at Brooklands Museum in Surrey.^[4]

Specifications (Super Drone)

Data from Jackson (1973), p.174^[2]

General characteristics

Crew: one
Length: 21 ft 2 in (6.45 m)
Wingspan: 39 ft 8 in (12.09 m)
Height: 7 ft 0 in (2.13 m)
Wing area: 172 ft² (16.0 m²)
Empty weight: 390 lb (177 kg)
Loaded weight: 460 lb (209 kg)
Powerplant: 1 × Douglas Sprite flat twin, 23 hp (17 kW)

Performance

Maximum speed: 70 mph (61 knots, 113 km/h)
Cruise speed: 60 mph (52 knots, 97 km/h)
Range: 300 mi (261 nmi, 483 km)
Service ceiling: 12,500 ft (3,800 m)
Rate of climb: 380 ft/min (1.9 m/s)
Wing loading: 2.67 lb/ft² (13.1 kg/m²)
Power/mass: 0.059 hp/lb (0.081 kW/kg)

Notes

↑ Flight 12 November 1936, pp.492—493.
1 2 3 4 Jackson (1973), pp.172-174
↑ "An Ultra-Light Record" Flight 9 April 1936 p375 (flightglobal.com)
↑ Ellis (2006), p.210.

References

Wikimedia Commons has media related to British Aircraft Company Drone.

"British Civil Aircraft: Machines for Private and Commercial Use". Flight. No. 12 November 1936. pp. 488–496.
Ellis, Ken (2006). Wrecks & Relics, 20th Edition. Midland Publishing. ISBN 1-85780-235-7.
Jackson, A.J. (1973). British Civil Aircraft since 1919 - Volume 1. Putnam & Company Ltd. ISBN 0-370-10006-9.

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