Fletcher FD-25

FD-25 Defender
Role Counterinsurgency aircraft
Manufacturer Fletcher
Designer John Thorp
First flight 1953
Primary users Royal Cambodian Air Force
Republic of Vietnam Air Force

Royal Thai Police

Number built 13

The Fletcher FD-25 Defender was a light ground-attack aircraft developed in the United States in the early 1950s.

Design and development

Designed by John Thorp, the Defender was a conventional low-wing cantilever monoplane with fixed tailwheel undercarriage. Provision was made for two machine guns in the wings, plus disposable stores carried on underwing pylons. Construction throughout was all-metal, and the pilot sat under a wide perspex canopy.

Operational history

Three prototypes were built, two single-seaters and a two-seater, but no orders were placed by the US military. In Japan, however, Toyo acquired the rights to the design, and built around a dozen aircraft, selling seven (five single-seater attack versions and two two-seat trainers) to Cambodia,[1] and four to Vietnam. One example (FD-25B JA3051)[2] served with the Royal Thai Police.

Survivors

One example (FD-25B N240D) remains in an airworthy condition today and appeared at the EAA AirVenture Oshkosh airshow in 2010. Two (a single-seater[3] and a two-seater[4]) are on museum display at the Tokyo Metropolitan College of Industrial Technology in Japan.

The wing design of the Fletcher FU-24 aerial topdressing plane was loosely based on that of the FD-25 Defender.[5] Almost 300 were built under licence in New Zealand from the mid-1950s and used for agricultural and skydiving operations.[6]

Specifications

Fletcher Defender at Fullerton, California, in 1971

Data from Jane's All the World's Aircraft 1955–56[7]

General characteristics

  • Crew: 1
  • Length: 20 ft 11 in (6.38 m)
  • Wingspan: 30 ft 0 in (9.14 m)
  • Height: 6 ft 3 in (1.91 m)
  • Wing area: 150 sq ft (14 m2)
  • Aspect ratio: 6:1
  • Airfoil: NACA 65.5-415
  • Empty weight: 1,228 lb (557 kg)
  • Gross weight: 2,500 lb (1,134 kg)
  • Fuel capacity: 60 US gal (50 imp gal; 230 L)
  • Powerplant: 1 × Continental E-225-8 6-cylinder, air-cooled, horizontally-opposed pistonengine, 225 hp (168 kW)

Performance

  • Maximum speed: 187 mph (301 km/h, 162 kn) at sea level
  • Cruise speed: 162 mph (261 km/h, 141 kn)
  • Range: 630 mi (1,010 km, 550 nmi)
  • Service ceiling: 16,500 ft (5,000 m)
  • Rate of climb: 1,725 ft/min (8.76 m/s)

Armament

  • Guns: 2 × wing-mounted .30-in (7.62 mm) machine guns
  • Rockets:
    • 40 × 2.75 inch rockets or
    • 4 × 5-inch rockets or
    • 20 × 8 cm rockets
  • Bombs: 2 × 250 lb (113 kg) bombs

See also

Aircraft of comparable role, configuration, and era

References

Notes

  1. ^ Grandolini 1988, p. 39.
  2. ^ "東洋航空工業株式会社、藤沢海軍航空隊の燃料庫庫". Archived from the original on 2020-02-16. Retrieved 2020-02-16.
  3. ^ "東洋航空工業 JA3092 東京都立産業技術高等専門学校 航空フォト | by VICTER8929さん 撮影2015年12月17日".
  4. ^ "東洋航空工業 - 東京都立産業技術高等専門学校 航空フォト | by kanade/Ryo@S.O.R.A.さん 撮影2013年03月25日".
  5. ^ Deerness, Ray. "The Fletcher Is Fifty". Pacific Wings. No. September 2004. Retrieved 5 February 2022.
  6. ^ Neal, Tracy (10 February 2011). "Fletcher operators defend aircraft". Stuff. Retrieved 29 January 2019.
  7. ^ Bridgman 1955, p. 260.

Bibliography

  • Bridgeman, Leonard (ed.). Jane's All the World's Aircraft 1955–56. New York: The McGraw-Hill Book Company, Inc.
  • Grandolini, Albert. "L'Aviation Royale Khmere: The first 15 years of Cambodian military aviation". Air Enthusiast (Bromley, UK: Fine Scroll) (Thirty-seven, September–December 1988): pp. 39–47. ISSN 0143-5450.
  • Taylor, Michael J. H. Jane's Encyclopedia of Aviation. London: Studio Editions. 1989. p. 393. ISBN 0-517-69186-8.
  • World Aircraft Information Files. London: Bright Star Publishing, 1985, pp. File 894 Sheet 25.
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