Akaflieg München Mü-27
The remarkable feature of this two-seater glider is its ability to alter its wing geometry in flight to improve performance.
To achieve this a flap deployed at the trailing edge increases the wing surface by 36% while changing the camber. This allows the pilot to adjust to the various conditions encountered while airborne. The design of the fs-29, by Akaflieg Stuttgart, aimed to achieve the same objective. Instead of a flap, however, that fs-29 uses a telescopic wing.
The goal was to build an aircraft capable of flying at low speeds when circling on thermals by means of a high camber and low surface loading (37 kg/m²), and at high speeds in straight-ahead flight with a thin profile and high surface loading (51 kg/m²).
These characteristics were achieved through a complex design and by sheer weight. Compared with conventional gliders, it requires much more work to set up and dismantle the Mü 27 before and after flight and to maintain it. This limits its suitability for competitions and everyday operations.
The Mü 27 was one of a kind and flew for the first time on February 24, 1979. On its final flight, after 712 flying hours, the glider flew to Oberschleissheim airfield on October 7, 2009.
- Manufacturer: Akademische Fliegergruppe München e.V., München, 1979
- Wingspan: 22.0 m
- Wing aspect ratio: 27.5 (20.2 with flap deployed)
- Surface loading: 51.1 (37.6) kg/m²
- Empty weight: 712 kg
- Min. sink rate: 0.65 (0.66) m/s at 108 (77) km/h
- Best glide ratio: 47 (36) at 115 (93) km/h