Akaflieg Köln LS11
| LS11 or AFK1 | |
|---|---|
 |
|
| The LS11 prototype at the AERO2003 exhibition | |
| Role | Two-seater- and Open-class sailplane |
| National origin | Germany |
| Manufacturer | Akaflieg Köln |
| First flight | 5 November 2005 |
| Status | in development |
The LS11 or AFK1 is a prototype Two-Seater Class sailplane currently in development at Akaflieg Köln e.V. (Academic Flying Group of the University of Cologne). The LS11 first flew on 5 November 2005.
Akaflieg Köln LS11 - AFK1 Nahaufnahme Rumpf
Akaflieg Köln LS11 - AFK1 Nahaufnahme Front
Akaflieg Köln LS11 - AFK1 Seitenansicht1
Akaflieg Köln LS11 - AFK1 Seitenansicht2
Akaflieg Köln LS11 - AFK1 Frontal
Akaflieg Köln LS11 - AFK1 winch launch1
Akaflieg Köln LS11 - AFK1 Windenstart2
Akaflieg Köln LS11 - AFK1 Windenstart3
Akaflieg Köln LS11 - AFK1 Windenstart4
Akaflieg Köln initiated in 2000 the concept design for the AFK1. One of the design goals was to use as many standard LS components as possible in order to lower the development costs. This and the large contribution of Wolf Lemke, who performed the aerodynamic and structural calculations, led to Rolladen-Schneider bestowing the type designation LS11 upon the Akafliegers' project.
The goal of the project is to design and build a thoroughly capable school glider with top performance for cross-country training, record flying and competition.
The LS11 gets its performance from an extended Rolladen-Schneider LS6 wing. After the Akaflieg Darmstadt D-41 demonstrated the feasibility of a high performance, multiplace glider based on the LS6 wing, the Köln Akafliegers felt they could profit from and improve upon that design.
The wing structure was redesigned and resembles somewhat the Rolladen-Schneider LS9 structure. The wings, almost entirely made of Carbon fibre Reinforced Plastic, were manufactured at the Rolladen-Schneider factory in Egelsbach in mid-2001, while the span extensions were built in the moulds developed by the Darmstadt group for the D41.
The LS11 prototype was featured as a work in progress at the 2003 and 2005 AERO Friedrichshafen exhibitions in Germany. The maiden flight was to be followed by a comprehensive flight test programme in 2006, to be carried out at Akaflieg Köln's home airfield, Dahlemer Binz in the Eifel region in Germany.
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