Helmy Aerogypt

The Helmy Aerogypt was a British four-seat cabin monoplane designed and built by Egyptian Saleh Helmy at Heston Aerodrome in 1938. The Aerogypt I was a low-wing cantilever monoplane initially powered by three 22 hp (16 kW) Douglas Sprite engines. The aircraft had an upward hinged roof that acted as a landing flap. Registered G-AFFG, it first flew in 1939. It later had the hinged roof removed, and was re-designated the Aerogypt II. Another modification added end plates to the horizontal tail surfaces, and was re-designated the Aerogypt III, and last flown in that configuration in September 1940.[1]

Aerogypt
Helmy Aerogypt, Heston 1939
Role Four-seat cabin monoplane
National origin United Kingdom
Manufacturer Helmy
Designer S Helmy
First flight 1939
Retired 1946
Produced 1938
Number built 1

In 1943, the aircraft was modified as the Aerogypt IV with a tricycle landing gear and two 65 hp (48 kW) Continental A65 engines. It was flown from White Waltham Airfield, but in November 1946 it was damaged beyond repair when it was dropped by the recovery crane following a landing accident at RAF Northolt.[2]

Variants
Aerogypt I
Initial designation, a three-engine monoplane with tail wheel landing gear.
Aerogypt II
Modified with hinged roof removed.
Aerogypt III
Modified with end plates on horizontal tail surfaces.
Aerogypt IV
Rebuilt as a two-engine monoplane with tricycle landing gear.

Specifications (Aerogypt IV)

Data from Jackson (1974), p 250

General characteristics

  • Crew: 1
  • Capacity: 3 passengers
  • Length: 19 ft 0 in (5.8 m)
  • Wingspan: 26 ft 4 in (8.02 m)
  • Empty weight: 1,150 lb (522 kg)
  • Gross weight: 2,400 lb (1,088 kg)
  • Powerplant: 2 × Continental A65 , 65 hp (48 kW) each

Performance

  • Maximum speed: 160 mph (257 km/h, 140 kn)

Notes
  1. Jackson (1974)
  2. Smith (2002)
gollark: I looked at some *Rust* code doing basically the same thing, and one piece of code I found did nothing in a similar way to mine, while another crashed with that stupid "OS error 22".
gollark: I looked at its (Go - ew) code and am not sure exactly why its works and mine doesn't.
gollark: Yes. It's weird, since I have some software on my laptop which uses multicast for service discovery and seems to have it work perfectly?
gollark: Hmm, this page says that the code hasn't been tested and also has no information for IPv6.
gollark: I thought it was limited to what fit in an IP packet, so about 1280 bytes.

References
  • Jackson, A.J. (1974). British Civil Aircraft since 1919 Volume 3. London: Putnam. ISBN 0-370-10014-X.
  • Smith, Ron. 2002. British Built Aircraft Vol.I Greater London. Tempus Publishing. ISBN 0-7524-2770-9
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