Weller UW-9 Sprint

The Weller UW-9 Sprint is a German ultralight aircraft designed and produced by Weller Flugzeugbau of Bibersfeld. The aircraft is supplied as a kit for amateur construction or as a complete ready-to-fly-aircraft.[1]

UW-9 Sprint
Role Ultralight aircraft
National origin Germany
Manufacturer Weller Flugzeugbau
Status In production (2012)

Design and development

The UW-9 is intended as a nostalgic 1930s style design that would comply with the Fédération Aéronautique Internationale microlight rules. It features a strut-braced parasol wing, a two-seats-in-tandem open cockpit, fixed conventional landing gear and a single engine in tractor configuration.[1][2]

The aircraft fuselage is made from welded steel tubing, with bolted-together aluminum tubing spar ladder-construction wings, all covered in doped aircraft fabric. Its 9.8 m (32.2 ft) span wing has an area of 13.3 m2 (143 sq ft) and a cut-out in the centre trailing edge for rear cockpit access. The wing is supported by "V"-struts and jury struts. The tailplane is also supported by "V"-struts. Standard engines available are the 70 hp (52 kW) Sauer UL 2100, the 75 hp (56 kW) Limbach L2000EA, the 100 hp (75 kW) Rotax 912ULS four-stroke powerplants, or the 85 hp (63 kW) Rotec R2800 radial engine. The Sprint is approved for aero-towing gliders and banner towing in Germany.[1][2]

Specifications (version)

Data from Bayerl and Weller[1][2]

General characteristics

  • Crew: one
  • Capacity: one passenger
  • Length: 5.7 m (18 ft 8 in)
  • Wingspan: 9.8 m (32 ft 2 in)
  • Height: 2.5 m (8 ft 2 in)
  • Wing area: 13.3 m2 (143 sq ft)
  • Empty weight: 290 kg (639 lb)
  • Gross weight: 472.5 kg (1,042 lb)
  • Fuel capacity: 87 litres (19 imp gal; 23 US gal)
  • Powerplant: 1 × Sauer UL2100 four cylinder, air-cooled, four stroke aircraft engine, 52 kW (70 hp)
  • Propellers: 3-bladed composite

Performance

  • Maximum speed: 170 km/h (110 mph, 92 kn)
  • Cruise speed: 130 km/h (81 mph, 70 kn)
  • Stall speed: 62 km/h (39 mph, 33 kn)
  • Range: 630 km (390 mi, 340 nmi)
  • Endurance: 7 hours
  • Maximum glide ratio: 10.5:1
  • Rate of climb: 6.8 m/s (1,340 ft/min)
  • Wing loading: 35.5 kg/m2 (7.3 lb/sq ft)

References
  1. Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 84. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  2. Weller Flugzeugbau (n.d.). "UW9 - "Sprint"". Retrieved 15 September 2012.
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