Evektor EPOS

The Evektor EPOS ("Electric powered small aircraft"), also called the SportStar EPOS, is a Czech electric ultralight and light-sport aircraft under development by Evektor-Aerotechnik of Kunovice. It was introduced at the AERO Friedrichshafen show in 2013.[1]

EPOS
Role Electric aircraft
National origin Czech Republic
Manufacturer Evektor-Aerotechnik
First flight March 2013
Introduction 2013
Status Under development (2015)

The aircraft first flew at the end of March 2013.[1]

Design and development

The EPOS is based upon the Evektor SportStar RTC, a Fédération Aéronautique Internationale microlight and CS-LSA light-sport aircraft. It uses the RTC model's fuselage, mated to a new wing of longer span. It features a cantilever low-wing, an enclosed cockpit with two-seats-in-side-by-side configuration under a bubble canopy, fixed tricycle landing gear and a single electric motor in tractor configuration.[1]

The aircraft is predominantly made from aluminum sheet. The initial electric motor employed was the Rotex RE X907 of 67 hp (50 kW) at 330 volts. In 2014 the design was upgraded with a Rotex RE BB 90-5, a brushless, DC, liquid cooled powerplant that produces 100 hp (75 kW) at 3,000 rpm and weighs 20 kg (44 lb). It is controlled by a MGM Compro HBC-Series V7, 300400/EPOS1 controller with a maximum continuous current of 300 amperes and a maximum supply voltage of 400 volts. The batteries are Kokam Company, Ltd. SLPB100216216H cells, with 45 cells connected in series, producing 378 volts.[1][2]

In February 2017 the company still described the design as "under development".[2]

Specifications (EPOS+)

Data from Tacke and manufacturer[1][2]

General characteristics

  • Crew: one
  • Capacity: one passenger
  • Length: 5.980 m (19 ft 7 in)
  • Wingspan: 10.462 m (34 ft 4 in)
  • Height: 2.476 m (8 ft 1 in)
  • Empty weight: 285 kg (628 lb) without battery containers, 316 kg (697 lbs) with four batteries.
  • Gross weight: 600 kg (1,323 lb)
  • Powerplant: 1 × Rotex RE BB 90-5 brushless, DC, liquid cooled electric motor, 75 kW (101 hp)
  • Propellers: 3-bladed VZLÚ model V332-3A1 composite, 1.625 m (5 ft 4 in) diameter

Performance

  • Maximum speed: 260 km/h (160 mph, 140 kn)
  • Cruise speed: 170 km/h (106 mph, 92 kn)
  • Stall speed: 72 km/h (45 mph, 39 kn)
  • Endurance: 1 hour with four battery units

References
  1. Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 48. Flying Pages Europe SARL, 2015. ISSN 1368-485X
  2. Evektor-Aerotechnik (2017). "SportStar EPOS+". Retrieved 18 February 2017.
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