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Jurca M.J.7. Gnatsum
Role Homebuilt near scale Replica Warbird
National origin France
Designer Marcel Jurca
First flight 1969
Number built 25+

The Jurca Gnatsum is a French homebuilt near scale replica aircraft based on the North American Mustang.[1]

Design & DevelopmentEdit

The Gnatsum is a low-wing cantilever monoplane an enclosed single-seat cockpit and manually retractable tailwheel landing gear based on that of the Jurca Sirocco.[2] Suitable for a number of engines around 200 hp, plans for the Gnatsum are available as the 2/3 scale MJ.7 and the 3/4 scale MJ.77, as well as the M.J.70 full-size representation. All versions are constructed from wood with fabric covering, and manufacturing rights to the kit aircraft were acquired by Falconar Avia.[3] although the company does not currently offer the aircraft design.

Some of the engines suitable for the MJ.7 Gnatsum series are:-

VariantsEdit

MJ-7
2/3 scale variant
MJ-7S Solo
Single-seat advanced trainer version of MJ-7, the under-belly scoop inherited from the Mustang design was removed.
MJ-77
3/4 scale Mustang variant that requires an engine of 250 to 600 hp (186 to 447 kW).[4]
MJ-70
Full-scale variant (under development in 1996)

Specifications (Jurca M.J.77 Gnatsum)Edit

Data from [5]

General characteristics
  • Crew: 1 Pilot
  • Capacity: 1 (small) passenger
  • Length: 6.53 m (21 ft 5 in)
  • Wingspan: 8.43 m (27 ft 8 in)
  • Wing area: 13.5 m2 (145 sq ft)
  • Empty weight: 998 kg (2,200 lb)
  • Gross weight: 1,297 kg (2,860 lb)
  • Fuel capacity: 50 U.S. gallons (190 L; 42 imp gal)
  • Powerplant: 1 × Geschwender , 260 kW (350 hp)
  • Propellers: 4-bladed

Performance

  • Maximum speed: 465 km/h; 251 kn (289 mph)
  • Cruise speed: 370 km/h; 200 kn (230 mph)
  • Stall speed: 105 km/h; 56 kn (65 mph)
  • Range: 805 km; 434 nmi (500 mi)
  • Rate of climb: 7.6 m/s (1,500 ft/min)

See alsoEdit

ReferencesEdit

  1. "All these planes you can build from plans". June 1970. p. 99. 
  2. "Error: no |title= specified when using {{Cite web}}". Aug 1965. 
  3. "Error: no |title= specified when using {{Cite web}}". Summer 1971. p. 59. 
  4. Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 94. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  5. "Jurca M.J-77 Mustang (75%)". Pilotfriend.com. http://www.pilotfriend.com/experimental/acft3/91.htm. Retrieved 2012-09-26. 

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External linksEdit

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