ATEC 122 Zephyr 2000

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

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]

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]

Variants

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

Specifications (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)

Performance

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)

References

^ ATEC v.o.s. (2015). "Atec, v.o.s. Czech manufacturer of Hi-Tech ultralights". Retrieved 16 January 2015.
^ ^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
^ ^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
^ ^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
^ ^a ^b ^c Purdy, Don: AeroCrafter - Homebuilt Aircraft Sourcebook, Fifth Edition, page 118. BAI Communications, 15 July 1998. ISBN 0-9636409-4-1