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E.P.9
Edgar Percival EP-9 at Ghent, Belgium c. 1972
Role Light aircraft
Manufacturer Edgar Percival Aircraft Limited
Designer Edgar Percival
First flight 21 December 1955
Number built 27

N747JC at Oshkosh, WI. 2001

The Edgar Percival E.P.9 was a 1950s British light utility aircraft designed by Edgar Percival and initially built by his company, Edgar Percival Aircraft Limited and later as the Lancashire Aircraft EP-9 Prospector by the Lancashire Aircraft Company.

Design and development

In 1954, Edgar Percival formed Edgar Percival Aircraft Limited at Stapleford Aerodrome, England, his original company had become part of the Hunting Group. His first new design, the Edgar Percival P.9 was a utility aircraft designed for agricultural use. The aircraft was a high-wing monoplane with an unusual pod and boom fuselage. The pod and boom design allowed the aircraft to be fitted with a hopper for crop spraying. The pilot and one passenger sat together with room for four more passengers. The clamshell side and rear doors also allowed the aircraft to carry standard size wool and straw bales or 45 imperial gallon (55 U.S. gallon) oil drums or even livestock. Even when the hopper was fitted, a ground crew of three could be carried when moving between sites.[1]

Operational history

The sole new build Prospector Mark 2 fitted with a Cheetah radial engine. Exhibited at the 1960 Farnborough Airshow

The prototype (registered G-AOFU) first flew on 21 December 1955. After a demonstration tour of Australia four aircraft were ordered as crop-sprayers and an initial batch of 20 was built. Two aircraft were bought by the British Army in 1958. In the same year, Samlesbury Engineering Limited acquired rights to the design and the company was renamed the Lancashire Aircraft Company. Lancashire Aircraft renamed the aircraft the Lancashire Prospector E.P.9 but only six more were built, the last of which was fitted with a Cheetah radial engine as the sole new build Mark Two.

In 1959 Kingsford Smith Aviation of Bankstown, Australia re-engined two aircraft with an Armstrong Siddeley Cheetah 10 radial engine as the EP-9C.

First prototype dusting in East Anglia, summer 1959

The E.P.9s in their various guises had a long and successful lifespan as private aircraft, utilized in multi-role STOL operations as an agricultural sprayer, light cargo aircraft, jump plane, air ambulance and glider tug. One EP-9 N747JC had a more chequered career and was one of two evaluated by the British Army Air Corps with serial XM819. It was once owned in the late 1960s by a gang of international smugglers who found it the ideal way to smuggle stolen furs and counterfeit Swiss francs between England and Belgium. Although the criminals were apprehended in 1969, the EP-9 ended up for sale in Belgium in 1972. After three years of pleasure flying in England, the aircraft was shipped to the United States where it sat in storage in a Wisconsin barn until 1999. After an extensive restoration, N747JC appeared at Oshkosh in 2001-03, in 2008 the aircraft was for sale.[2]

Variants

Edgar Percival E.P.9
Production aircraft powered by a 270 hp Lycoming GO-480-B1.B engine, 21 built.
Edgar Percival E.P.9C
Two aircraft re-engined in Australia by Kingsford Smith Aviation at Brisbane with a 375 hp Armstrong Siddeley Cheetah 10 radial engine.
Lancashire Aircraft E.P.9 Prospector
Continued production powered by a 295 hp Lycoming GO-480-G1.A6 engine, six built.
Lancashire Aircraft E.P.9 Prospector II
Prototype (c/n 47 G-ARDG) officially re-engined with a 375 hp Armstrong Siddeley Cheetah 10 radial engine.
Total produced - 27 airframes (a further unfinished fuselage was not completed)

Survivors

E.P.9 Prospector c/n 28 VH-DAI displayed in Drage Airworld Wangaratta Victoria in 1988

  • c/n 28 VH-EPN under restoration Victoria, Australia
  • c/n 30 CF-NWI stored Reynolds Museum, Wetaskiwin, Alberta, Canada
  • c/n 36 ZS-CHZ, displayed as 'XM797', airworthy, based SAAF Historic Flight, Zwartkop, South Africa
  • c/n 39 N747JC, airworthy, based Woodruff, Wisconsin, USA
  • c/n 41 N8395 airworthy (Currently Being Restored), based Mississippi, USA
  • c/n 42 ZK-PWZ airworthy, based Kairanga Aviation Ltd, New Zealand

Specifications (E.P.9)

Data from British Civil Aircraft since 1919 - Volume 2[3]

General characteristics

  • Crew: One
  • Capacity: Five passengers (or hopper for 1,550 lb (705 kg) fertilizer)[4]
  • Length: 29 ft 6 in (8.99 m)
  • Wingspan: 43 ft 6 in (13.26 m)
  • Height: 8 ft 9 in (2.67 m)
  • Wing area: 227.6 ft2 (21.14 m2)
  • Empty weight: 2,010 lb (912 kg)
  • Gross weight: 3,550 lb (1610 kg)
  • Powerplant: 1 × Lycoming GO-480-B1B flat-six piston engine, 270 hp (201 kW) each

Performance

  • Maximum speed: 146 mph (235 km/h)
  • Cruise speed: 128 mph (206 km/h)
  • Range: 580 miles (933 km)
  • Service ceiling: 17,500 ft (5,335 m)
  • Rate of climb: 1,120 ft/min (5.7 m/s)

See also

References

Notes
  1. Flight 30 December 1955, p. 969.
  2. Odum, David. "Oshkosh 2003 Scrapbook: Percival EP.9." Airplane Zone, 2003. Retrieved: 4 December 2011.
  3. Jackson 1974, pp. 197–198.
  4. Flight 30 December 1955, p. 972.
Bibliography

External links

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