Jurca Gnatsum

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Jurca M.J.7. Gnatsum
Jurca MJ.77 Gnatsum ‘N751JR’ “Magnificent Obsession II” (30457460231).jpg
Role Homebuilt near scale replica warbird
National origin France
Designer Marcel Jurca
First flight 1969
Number built 25+
Variants Falconar SAL Mustang

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

Design & Development[edit]

The Gnatsum (Mustang spelled backward) is one of many wooden homebuilt designs from Romainian designer Marcel Jurca. Jurca, a Henschel Hs 129 pilot in World War II, expanded his warbird replica designs to include the allied P-51.[2]

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.[3] 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.[4] although the company does not currently offer the aircraft design.

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


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.
3/4 scale Mustang variant that requires an engine of 250 to 600 hp (186 to 447 kW).[5][6]
Full-scale variant (under development in 1996)

Specifications (Jurca M.J.77 Gnatsum)[edit]

Data from [7]

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


  • 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 also[edit]

Aircraft of comparable role, configuration and era


  1. ^ "All these planes you can build from plans". Popular Science: 99. June 1970. 
  2. ^ Nick Stasinos (February 1972). "Marcel's Mini Fighters". Plane & Pilot. 
  3. ^ Sport Aviation: 35. Aug 1965.  Missing or empty |title= (help)
  4. ^ Air Trails: 59. Summer 1971.  Missing or empty |title= (help)
  5. ^ Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 94. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  6. ^ Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 100. Flying Pages Europe SARL, 2015. ISSN 1368-485X
  7. ^ "Jurca M.J-77 Mustang (75%)". Pilotfriend.com. Retrieved 2012-09-26. 

External links[edit]