title: Aurore MB 04 Souris Bulle
text: # Aurore MB 04 Souris Bulle
  
  The Aurore MB 04 Souris Bulle (English: Bubble Mouse) is a French ultralight aircraft, designed by Michel Barry and produced by Aurore Sarl of Sauvagnon. The aircraft is supplied as a kit or as plans for amateur construction.
  
  ## Design and development
  
  The Souris Bulle was designed to comply with the Fédération Aéronautique Internationale microlight rules. The aircraft features a strut-braced high-wing, a two-seats-in-tandem enclosed cockpit under a bubble canopy, fixed conventional landing gear and a single engine in tractor configuration. The rear seat has very limited visibility.
  
  The aircraft is made from wood with its flying surfaces covered in doped aircraft fabric. Its 11.25 m (36.9 ft) span wing employs single supporting struts. The standard recommended engine is the 60 hp (45 kW) JPX 4T two-stroke powerplant or a 45 hp (34 kW) Volkswagen air-cooled engine. The Souris Bulle has a glide ratio of 18:1.
  
  The standard day, sea level, no wind, take off with a 45 hp (34 kW) engine is 52 m (171 ft) and the landing roll is 91 m (299 ft).
  
  In 2015 the aircraft kit was €13,300 and plans sold for €380. The manufacturer estimates the construction time from the supplied kit as 650 hours.
  
  ## Specifications (MB 04 Souris Bulle)
  
  Data from Bayerl and Purdy
  
  General characteristics
  
  * Crew: one
  * Capacity: one passenger
  * Length: 7.92 m (26 ft 0 in)
  * Wingspan: 11.25 m (36 ft 11 in)
  * Wing area: 15 $m^2$ (160 sq ft)
  * Empty weight: 250 kg (551 lb)
  * Gross weight: 450 kg (992 lb)
  * Fuel capacity: 50 litres (11 imp gal; 13 US gal)
  * Powerplant: 1 × JPX 4T four cylinder, air-cooled, four stroke aircraft engine, 45 kW (60 hp)
  * Propellers: 2-bladed wooden
  
  Performance
  
  * Maximum speed: 170 km/h (110 mph, 92 kn)
  * Cruise speed: 140 km/h (87 mph, 76 kn)
  * Stall speed: 60 km/h (33 mph, 29 kn)
  * Maximum glide ratio: 18:1
  * Rate of climb: 4 m/s (790 ft/min)
  