| Akaflieg Karlsruhe | |
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HW100 - 45000
UAW55 - 105000 RRW100 - 175000 PKRR - 7500 |
Akaflieg Karlsruhe Akaflieg Karlsruhe Company type - Non-profit Genre - Aviation research Founded - 1928 and 1951 Headquarters - Karlsruhe, Germany Website - www.akaflieg.uni-karlsruhe.de Akaflieg Karlsruhe is one of ten flying groups (Akaflieg) attached to German universities. Akaflieg is an abbreviation for Akademische Fliegergruppe, an academic group of students working with a German University. The Akademische Fliegergruppe Karlsruhe e.V. (Akaflieg Karlsruhe) - (Academic Aviator Group Karlsruhe) is a group of students enrolled at Karlsruhe Institute of Technology, who are involved with the development and the design of gliders, as well as research in aerodynamics. History Akaflieg Karlsruhe from 1928 to 1933 In the winter semester of 1927/28 a glider group was founded by Karl Töpfer, Assistant at the chair for motor vehicles with a teaching assignment for aircraft technology. The association was registered as Academic Flying Club Karlsruhe 1928. The hang-glider, a large wing equipped with a passenger harness called „Brigant“/"Bandit" was taken over from the Glider Club Karlruhe, which had just been dissolved. Until 1933 three glider planes were built, named "Zögling"/"Pupil", "Hol’s der Teufel"/"Let the devil get it" and "Karlsruhe". On May 13, 1933, the Akaflieg Karlsruhe was dissolved. The entire equipment was repossessed to the Karlsruhe grouping of the German Aviation Federation. Re-foundation 1951 Glider flying was allowed in Germany on May 22, 1951, on which the new Academic Flying Group of Karlruhe was officially founded. on its first day it 78 members. Thanks to the support of many friends and sponsors, the fleet rapidly expanded. In 1954 a two-seater (model Kranich III) was purchased and got the name „Walter“. In 1955 a new Doppelraab V6 named „Studiosus“ and a motor-plane Bücker 181 "Bestmann" were added to the fleet. A self-built L-Spatz 55 was soon built by the Akaflieg. Mid Sixties work on the project AK-1 started. On January 9, 1971, at 12:31 Central European Time AK-1 was airborne on its own propulsion. The first Prototype of Akaflieg Karlsruhe after the war had proven itself. The Seventies to Eighties Flight trials of the Ak-1 were undertaken in the beginning of the seventies. On October 27, 1973, the assemblee decided to launch a new project. AK-2 should be a powerful motor-glider out of Fiberglas. The project was never finished. In parallel flight data calculators for glider flying had been conceived and constructed. AK-3 became a project and a finished flight computer with electric variometer and glide slope indicator was borne, which was even produced in a small series. AK-3R was completed as approach slope calculator The Ak-4 project was a in cooperation with the Institute for climate research and meteorology at the Karlsruhe Institute of Technology. Climatic data over the Upper Rhine Region was measured with an airplane purpose built with special equipment for in flight data collection. Akaflieg Karlsruhe today Akaflieg Karlsruhe has a workshop on the west campus of the Karlsruhe Institute of Technology. The students usually work off the required 300 hours per year there. The DG-1000 with a 400-N-Turbine (AK-9) is finished and in flight trials. The main project is the construction of AK-X, a pure wing 15-class glider. The flying activities, with winch hauling, are held on the glider field of Rheinstetten, close to the fair of Karlsruhe since the airport of Karlsruhe-Forchheim was closed. Gliders/ Prototypes Aircraft designed and/or built at Akaflieg Karlsruhe include: Akaflieg Karlsruhe AK-1 "Mischl" self-launching sailplane Single seat glider: steel tube frame construction with fiberglass hull, 15 m of wingspan fitted with a retractable 4 cylinder, two stroke, 28 HP motor, type F10A from Hirth industries. Akaflieg Karlsruhe AK-2 An adaptation of a Glasflügel 604 glider with a motor remaining in the hull, which was a novelty in the Seventies. The project was cancelled in favor of AK-5 after 16 years. AFK-3 A single engine Winch was conceived as a novelty, using one engine for driving the truck on the road and hauling the gliders into the air. The winch is hydro-electric and the winch operator uses the passenger seat instead of a separate operator cabin. Akaflieg Karlsruhe AK-5 "Ardea" Single-seat standard glider in Fiberglass construction. The hull is a Glasflügel 604. The wings have the shape of a Falcon, a prototype designed by Hansjörg Streifeneder (maiden flight 1981). The aim of the project was to pass on the knowledge and incorporate modern, less expensive construction methods as fiberglass. It can be used in instruction because of easy handling. The first flight was June 1, 1990. Akaflieg Karlsruhe AK-5b "Otto K.K." This is a development of AK-5 with "winglets" and rebuild hull interior. New, easier steering mechanics allow student pilots to fly and new materials are lighter. The first flight of AK-5b was 1996. Akaflieg Karlsruhe AK-8 Single seat 15m standard class glider. New elliptical shaped were built with an aluminum mold. The hull is a DG-600M. Maiden flight of AK-8 was in 2003. After a crash a new left wing was finished in 2009. Improved wings with winglets and improved performance were added in 2014. Akaflieg Karlsruhe AK-9 or DG-1000J D-KAKJ "Jet" A 400N turbine was installed in a two-seater DG-1000. In Cooperation with the Institute for Thermal Flowengines at the KIT the behavior of an AMT Titan Jet Engine by the Dutch producer Draline were researched and improved with a silencer. AK-X A pure wing glider-prototype with improved handling and performance is currently being built, inspired by the pure-wing conception of the Horten brothers and based on the experience of the SB-13 built by Akaflieg Braunschweig. A 1:2 model flew mid 2015. The AK-1 on display at the Deutsches Museum Flugwerft Schleißheim AK-8 AFK-3 Winch AK-5 in flight DG1000J in flight CAD-Modell of AK-X Akaflieg Karlsruhe AK-1 Mischl (Akaflieg Karlsruhe AK-1) AK-1 Mischl Role - Motorglider National origin - Germany Manufacturer - Akaflieg Karlsruhe First flight - 9 January 1971 Number built - 1 The Akaflieg Karlsruhe AK-1 Mischl is a Motor-glider designed and built in Germany and first flown on 9 January 1971. Specifications General characteristics Crew: 1 Length: 7.20 m (23 ft 7 in) Wingspan: 15 m (49 ft 3 in) Wing area: 14.36 m2 (154.6 sq ft) Aspect ratio: 15.7 Empty weight: 323.8 kg (714 lb) Max takeoff weight: 420 kg (926 lb) Maximum speed: 180 km/h (110 mph, 97 kn) Akaflieg Karlsruhe AK-5 Akaflieg Karlsruhe AK-5 Role - Club class sailplane National origin - Germany Manufacturer - Akaflieg Karlsruhe First flight - June 1990 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 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. Specifications 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 AK-5 in Neresheim AK-5 in the Alps near Timmersdorf Akaflieg Karlsruhe AK-5b Akaflieg Karlsruhe AK-5b Role - Club-Class glider National origin - Germany Manufacturer - Akaflieg Karlsruhe First flight - May 1996 Number built - 1 Developed from - Akaflieg Karlsruhe AK-5 The Akaflieg Karlsruhe AK-5b is a single-seat club class glider designed and built in Germany by members of Akaflieg Karlsruhe. Design and development Poor handling characteristics of the AK5 prompted Akaflieg Karlsruhe to design a successor with improved handling capable of being used as a first single-seater at the Akaflieg Karlsruhe gliding club. During development of the AK-5b it was decided to make changes to the construction by using carbon-fibre, aramid fibres and glass-fibre. As part of the re-design, a new cockpit was designed with new crash-worthy canopy, equipped with a new opening and emergency release mechanisms Specification (AK-5b) General characteristics Crew: 1 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: 255 kg (562 lb) Gross weight: 450 kg (992 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: 0.58 m/s (114 ft/min) at 85 km/h (53 mph; 46 kn) Wing loading: 42.2 kg/m2 (8.6 lb/sq ft) AK-5b landing in Grabenstetten Akaflieg Karlsruhe AK-8 Akaflieg Karlsruhe AK-8 Role - Standard-class glider National origin - Germany Manufacturer - Akaflieg Karlsruhe First flight - August 2003 Number built - 1 The AK-8 is a single-seat FAI-Standard Class sailplane, designed and built in Germany by members of Akaflieg Karlsruhe which can be distinguished by its elliptical leading edge. Design and development Made of synthetic materials, such as aramid fibre, carbon fibre and glass-fibre with cast aluminium alloy ribs, the AK-8 wing features an elliptical leading edge. The fuselage is derived from that of the DG-600M. The first flight of the AK-8 took place in 2003, but a field landing accident caused severe damage to the left wing. After the left wing was rebuilt, the AK-8 flew again in 2009. In 2014 new outer wings with winglets were built to improve the flying characteristic. Specifications General characteristics Length: 6.82 m (22 ft 5 in) Wingspan: 15 m (49 ft 3 in) Wing area: 9.75 m2 (104.9 sq ft) Empty weight: 232.8 kg (513 lb) Gross weight: 450 kg (992 lb) Performance Never exceed speed: 270 km/h (170 mph, 150 kn) the AK-8 The AK-8 rolling for take-off at Aalen-Elchingen |