Akaflieg Dresden D-B11
| Akaflieg Dresden DB 11 | |
|---|---|
| Type: | Glider |
| Design country: | |
| Manufacturer: | |
| First flight: |
under construction (as of February 2017) |
The Akaflieg Dresden D-B11 Adebar is a two-seater glider of the student flight group Akaflieg Dresden in fiber composite construction .
history
The D-B11 project (“Dresdener Baumuster” or “Dresdener Baunummer”) of the Academic Fliegergruppe Dresden took shape in November 2001. Originally intended as a replacement for the club's school glider , which was getting on in years, the idea of a flying research platform soon developed. In order to keep the effort for the group, which was only founded in 1998, manageable, in 2002 they wanted to concentrate on the construction of the wings and to recreate the side-by-side fuselage D-43 of the Akaflieg Darmstadt. After changing the concept, the wing and tail unit of an existing two-seater are now used and the focus is on the fuselage construction.
The construction of the trunk model began in early 2006; In 2010 it was possible to remove negative molds in which the shells of a mock-up of the front fuselage were created.
construction
The wings were taken from the Schempp-Hirth Duo Discus XL and slightly modified. In order to be able to attach probes up to 2 m in length, 1 kg mass (10 kg close to the fuselage) and external loads up to 60 kg for measurement flight operations, 10 attachment points are provided at a distance of 1.50 m across the span. Handhole covers and cable ducts allow cables to be laid inside the wing, prepared pressure measurement bores over the entire circumference of the wing allow the flow around the profile to be examined, and fiber Bragg grids integrated into the wing structure enable the actual expansion that occurs during flight maneuvers to be detected . This could serve to revise current load assumptions . The plan is to build another pair of “measuring wings” in order to be able to use the aircraft fuselage in the training aircraft role or for cross-country flights while preparing for a flight measurement .
The design of the two-seater fuselage aimed to provide sufficient storage space for measurement technology, crash safety and cockpit ergonomics . Using dynamic FEM analyzes , the typical 45 ° impact on the ground was simulated at a speed of 20 km / h. The resulting CFRP fuselage structure with the canopy frame as an important component is subjected to a load test. The view from both seats, which are arranged one behind the other, is very good for the crew thanks to the large-format hoods.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 2 |
| length | 9.20 m |
| span | 20 m |
| Wing area | 16 m² |
| Wing extension | 24 |
| Glide ratio | 45 (arithmetical) |
| Slightest sinking | |
| Empty mass | |
| Max. Takeoff mass | 750 kg |
| Wing loading | 30-45 kg / m² |
| Top speed |
See also
Web links
Individual evidence
- ↑ Frank Dienerowitz: Akaflieg Dresden and their dream of the two-seater - the D-B11 . In: Akaflieg Dresden (Ed.): Report book . No. 1 , March 2002, p. 5-8 .
- ↑ Construction diary. In: akaflieg-dresden.de. Retrieved September 25, 2017 .
- ↑ Flying measuring platform. In: akaflieg-dresden.de. Retrieved February 3, 2017 .
- ↑ a b D-B11. (PDF; 2.6 MB) Akaflieg Dresden's research and training aircraft. (No longer available online.) In: akaflieg-dresden.de. October 15, 2015, formerly in the original ; Retrieved September 25, 2017 . ( Page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ↑ Crash cockpit. In: akaflieg-dresden.de. Retrieved February 3, 2017 .
- ↑ The aircraft - technical data. (No longer available online.) In: akaflieg-dresden.de. Formerly in the original ; accessed on June 30, 2016 . ( Page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
