Akaflieg Karlsruhe AK-5

From Wikipedia, the free encyclopedia
Akaflieg Karlsruhe AK-5
Akaflieg Karlsruhe AK-5 Neresheim.jpg
AK-5 in Neresheim
Role Club class sailplane
National origin Germany
Manufacturer Akaflieg Karlsruhe
First flight June 1990[1]
Number built 1
Developed into Akaflieg Karlsruhe AK-5b

The AK-5 is a single-seat club class sailplane designed and built in Germany by members of Akaflieg Karlsruhe.

Design and development[]

AK-5 in the Alps near

The forward fuselage of the glider was taken from the Glasflügel 604 and the wings were built to the design of the glider, an experimental prototype designed and built by Hansjörg Streifeneder. The cockpit interior was newly designed including a self-designed and built flight director / variometer system and parallelogram control input system similar to Glasflügel practice.[2]

The experience gained while building the new winglets for the AK-8 glider will be used to improve the performance of the AK-5. It is planned to build extensions to the existing wings and to attach winglets.

Specifications[]

Data from [3]

General characteristics

  • Crew: 1
  • Length: 6.8 m (22 ft 4 in)
  • Wingspan: 15 m (49 ft 3 in)
  • Wing area: 10.66 m2 (114.7 sq ft)
  • Aspect ratio: 21.11
  • Airfoil: HQ-21/17.5
  • Empty weight: 278 kg (613 lb)
  • Gross weight: 485 kg (1,069 lb)

Performance

  • Never exceed speed: 270 km/h (170 mph, 150 kn)
  • Maximum glide ratio: 39:1 at 105 km/h (65 mph; 57 kn)
  • Rate of sink: 0.580 m/s (114.2 ft/min) at 85 km/h (53 mph; 46 kn)
  • Wing loading: 45 kg/m2 (9.2 lb/sq ft)

Avionics

  • self-designed flight director / variometer

References[]

  1. ^ AK-5 Erstflug Archived 2011-08-17 at the Wayback Machine bei akaflieg-karlsruhe.de
  2. ^ "AK-5" (in German). 11 June 2015. Retrieved 21 September 2016.
  3. ^ "Akaflieg Karlsruhe AK-5". All-Aero. Retrieved 21 September 2016.

External links[]

Retrieved from ""