Flitzer Z-21

The Flitzer Z-21 or Staaken Flitzer is a British amateur-built aircraft, designed by Lynn Williams and produced by Flitzer Sportplanes of Aberdare, Wales. The aircraft is supplied as plans for amateur construction.[1][2]

Z-21
Role Amateur-built aircraft
National origin United Kingdom
Manufacturer Flitzer Sportplanes
Bell Aeromarine
Designer Lynn Williams
Status Plans available (2012)

In the late 1990s it was also marketed as plans and in kit form by Bell Aeromarine of Leicester, UK.[3]

Design and development

The Z-21 is a single-seat, open cockpit 1920s-style biplane with fixed conventional landing gear with spoked wheels and a single engine in tractor configuration.[1][2]

The aircraft is made from wood, with its flying surfaces covered in doped aircraft fabric. Its 5.5 m (18.0 ft) span wing has a combined area of 9 m2 (97 sq ft) and ailerons on the bottom wing only. The aircraft was designed for the 65 hp (48 kW) Volkswagen air-cooled engine, but other variants have been developed that use a variety of engines, including the 110 hp (82 kW) Rotec R2800 radial engine.[1][2]

Further planned developments include a tandem two seater, a four aileron version and a lighter weight version.[1][2]

Operational history

In August 2014 there were eleven Flitzers registered in the United Kingdom.[4]

Specifications (Z-21)

Data from Bayerl and Tacke[1][2]

General characteristics

  • Crew: one
  • Wingspan: 5.5 m (18 ft 1 in)
  • Wing area: 9 m2 (97 sq ft)
  • Empty weight: 218 kg (481 lb)
  • Gross weight: 341 kg (752 lb)
  • Fuel capacity: 38.6 litres (8.5 imp gal; 10.2 US gal)
  • Powerplant: 1 × Volkswagen air-cooled engine four cylinder, air-cooled, four stroke automotive conversion, 48 kW (65 hp)
  • Propellers: 2-bladed wooden

Performance

  • Maximum speed: 150 km/h (93 mph, 81 kn)
  • Cruise speed: 137 km/h (85 mph, 74 kn)
  • Stall speed: 67 km/h (42 mph, 36 kn)
  • Rate of climb: 3.6 m/s (710 ft/min)
  • Wing loading: 37.9 kg/m2 (7.8 lb/sq ft)

References
  1. Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 103. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  2. Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 108. Flying Pages Europe SARL, 2015. ISSN 1368-485X
  3. Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition, page 362. BAI Communications, 15 July 1998. ISBN 0-9636409-4-1
  4. "CAA Register".
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