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

Akaflieg Karlsruhe AK-5
AK-5 in Neresheim
Role	Club class sailplane Type of aircraft
National origin	Germany
Manufacturer	Akaflieg Karlsruhe
First flight	June 1990[1]
Number built	1
Developed into	Akaflieg Karlsruhe AK-5b

Design and development

The forward fuselage of the glider was taken from the Glasflügel 604 and the wings were built to the design of the Streifeneder-Hansen Falcon 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

External links

Wikimedia Commons has media related to Akaflieg Karlsruhe AK-5.

• Akaflieg Karlsruhe (in German)
• Akaflieg Karlsruhe homepage

На других языках

[de] Akaflieg Karlsruhe AK-5