Icaré II

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Icaré II
Icare II in flight
Type: Solar plane
Design country:

Germany Federal RepublicFederal Republic of Germany BR Germany

Manufacturer:

University of Stuttgart

First flight:

1996

Number of pieces:

1

Icaré II on its first flight
Flight5g.jpg

The motor glider Icaré II is a project of the aerospace engineering faculty at the University of Stuttgart . It is powered by solar energy , making it a solar airplane . This project won several awards. The aircraft completed an approx. 350 km long distance flight .

Project

The Faculty of aerospace engineering at the University of Stuttgart took the city by Icaré II at the 1996 world advertised Berblinger Price Ulm part. The goal was to develop an electrically powered motor glider that is able to stay in horizontal flight using only solar energy. With the help of sponsorship funds from the state of Baden-Württemberg and the University of Stuttgart, the Icaré was created as a joint research project within the aerospace engineering faculty under the direction of R. Voit-Nitschmann . On July 7, 1996, the project won the award for the most powerful solar aircraft. Students and members of the Academic Aviation Groups (Akaflieg) also worked on the Icaré research project ; about 45 study and diploma theses were written as part of the development of the aircraft.

Icaré II

Icaré is a high-performance glider designed for solar operation, which was designed for the lowest possible sink rate and responds to the slightest thermals . Combined motor / thermal flying is possible. The 12 kW electric motor is on the vertical stabilizer attached, in order to increase the efficiency. An accumulator consisting of four strings with a capacity of 915 Wh is used for self-launch, which is charged in flight by the large-scale solar generator on the wing . With the first battery, the aircraft could climb directly to an altitude of 400 m AGL . With the newly installed, more powerful lithium polymer batteries , the starting height can be improved to 1200 m AGL. Special features include the low curb weight and the low cruising speed , which is reminiscent of the flight characteristics of a classic car.

Technical specifications

  • Span 25 m
  • Wing area 25 m²
  • Wing loading 14 kg / m²
  • Solar cell area 20.6 m² (82% of wing area)
  • Empty weight 264 kg
  • Max. Load 80 kg
  • Take-off distance on grass 180 m
  • lowest sink (at 50 km / h) 0.39 m / s
  • Glide ratio (at 61 km / h) 43
  • Stall speed at max. Weight (wing flaps neutral, air brakes retracted) 44 km / h
  • permissible top speed 120 km / h
  • Max. Flight duration without Sonneneinstr. (full batteries) 40 min
  • Max. Range without sun exposure (full batteries) 33.6 km
  • required Power for level flight 1400 W.

Drive:

  • Battery energy 915 Wh
  • Motor peak power 12,000 W.
  • Efficiency 92%

Awards

1996:

  • Ulm, Berblinger Prize
    The aim was to construct an aerodynamically controlled solar airplane that was suitable for everyday use and that would be able to stay in the air for a long time using only solar energy. The pilot weight for the test flight was set at 90 kg.

1997:

  • Oshkosh (USA), EAA - Special Achievement Award
  • Braunschweig (Germany), German Aero Club: Golden Daidalos Medal
  • St. Aubin (France): OSTIV Prize

Individual evidence

  1. ^ Icaré aircraft data

Web links