The ATEC 122 Zephyr 2000 is a Czech ultralight aircraft, designed by Oldrich Olansky and produced by ATEC v.o.s. of Libice nad Cidlinou. The aircraft is supplied as a complete ready-to-fly-aircraft or as a kit for amateur construction.[2][3][4][5]

122 Zephyr 2000
Role Ultralight aircraft and Light-sport aircraft
National origin Czech Republic
Manufacturer ATEC v.o.s.
Designer Oldrich Olansky
Introduction 1996[1]
Status In production
Number built more than 200
Variants ATEC 321 Faeta

Design and development


The Zephyr was designed to comply with the Fédération Aéronautique Internationale microlight rules. It features a cantilever low-wing, a two-seats-in-side-by-side configuration enclosed cockpit under a bubble canopy, fixed tricycle landing gear, a T-tail and a single engine in tractor configuration.[2][3][4]

The aircraft's fuselage is made from composites with wooden bulkheads. The semi-tapered 9.6 m (31.5 ft) span wing is made from plywood with composite spars and leading edges and employs a UA-2 airfoil. The wing is covered with doped aircraft fabric. The standard engine factory-supplied was the 100 hp (75 kW) Rotax 912ULS four-stroke powerplant.[2][3][4][5]

The Zephyr is noted for its low payload. With a useful load of 197.5 kg (435 lb) and full fuel of 43 kg (95 lb), this leaves only 154.3 kg (340 lb) for occupants and baggage.[2][3][4]

The Zephyr was later developed into the ATEC 321 Faeta.[2]


Zephyr 2000
base model for FAI microlight category.[2]
Zephyr 2550
Light-sport aircraft model[3][4]

Specifications (122 Zephyr 2000)

ATEC 122 Zephyr 2000

Data from Bertrand and Purdy[2][5]

General characteristics

  • Crew: one
  • Capacity: one passenger
  • Wingspan: 9.6 m (31 ft 6 in)
  • Wing area: 10.07 m2 (108.4 sq ft)
  • Airfoil: UA-2
  • Empty weight: 275 kg (606 lb)
  • Gross weight: 472.5 kg (1,042 lb)
  • Fuel capacity: 60 litres (13 imp gal; 16 US gal)
  • Powerplant: 1 × Rotax 912ULS four cylinder, liquid and air-cooled, four stroke, 75 kW (101 hp)


  • Maximum speed: 265 km/h (165 mph, 143 kn)
  • Cruise speed: 215 km/h (134 mph, 116 kn)
  • Stall speed: 65 km/h (40 mph, 35 kn)
  • Rate of climb: 6.5 m/s (1,280 ft/min)
  • Wing loading: 46.92 kg/m2 (9.61 lb/sq ft)


  1. ^ ATEC v.o.s. (2015). "Atec, v.o.s. Czech manufacturer of Hi-Tech ultralights". Retrieved 16 January 2015.
  2. ^ a b c d e f g Bertrand, Noel; Rene Coulon; et al: World Directory of Leisure Aviation 2003-04, page 124. Pagefast Ltd, Lancaster UK, 2003. ISSN 1368-485X
  3. ^ a b c d e Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 27. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  4. ^ a b c d e Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 29. Flying Pages Europe SARL, 2015. ISSN 1368-485X
  5. ^ a b c Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition, page 118. BAI Communications, 15 July 1998. ISBN 0-9636409-4-1