title: Airsport Sonet
text: # Airsport Sonet
  
  The Airsport Sonet (English: Sonnet) is a Czech ultralight aircraft, designed and produced by Airsport of Zbraslavice. The aircraft is supplied in complete, ready-to-fly form.
  
  ## Design and development
  
  The aircraft was derived from the Airsport Sonata motor glider and designed to comply with the Fédération Aéronautique Internationale microlight rules. It features a cantilever low-wing, a T-tail, a two-seats-in-side-by-side configuration enclosed cockpit, fixed tricycle landing gear and a single engine in tractor configuration.
  
  The Sonet is made from composites. Its polyhedral wing comes in three optional spans: 10.2 m (33.5 ft), 11.4 m (37.4 ft) and 15 m (49.2 ft). It requires an engine of about 65 hp (48 kW) and no more than 60 kg (132 lb). Standard engines available are the 64 hp (48 kW) Rotax 582 two-stroke and the 60 hp (45 kW) HKS 700E four-stroke powerplant.
  
  ## Specifications (Sonet 11.4)
  
  Data from Bayerl and Tacke
  
  General characteristics
  
  * Crew: one
  * Capacity: one passenger
  * Wingspan: 11.7 m (38 ft 5 in)
  * Wing area: 10.5 $m^2$ (113 sq ft)
  * Empty weight: 265 kg (584 lb)
  * Gross weight: 450 kg (992 lb)
  * Fuel capacity: 60 litres (13 imp gal; 16 US gal) in two tanks
  * Powerplant: 1 × Rotax 582 twin cylinder, liquid air-cooled, two stroke, 48 kW (64 hp)
  
  Performance
  
  * Maximum speed: 201 km/h (125 mph, 109 kn)
  * Cruise speed: 140 km/h (87 mph, 76 kn)
  * Stall speed: 64 km/h (40 mph, 35 kn)
  * Rate of climb: 4 m/s (790 ft/min)
  * Wing loading: 42.9 $kg/m^2$ (8.8 lb/sq ft)
  