Slingsby Primary
| Slingsby Primary | |
|---|---|
 Original RRG pupil 1931 |
|
| Type: | Glider |
| Design country: |
Germany / Great Britain |
| Manufacturer: | |
| First flight: |
March 16, 1930 |
| Production time: |
1930–1932 (Dagnall) |
| Number of pieces: |
29 at Dagnall |
The Slingsby Type 3 (T.3) Primary (often also referred to as Dagling) was a single-seat glider made by the British manufacturer Slingsby Sailplanes, Scarborough , which was developed in the 1930s from the German beginner glider Zögling and was used as a school glider .
history
Student as a role model
The origins of the single-seat school glider go back to German developments in the 1920s, when the number of two-seat trainers was low and it was considered possible to carry out the training with simply structured and robust single-seaters from the start. The corresponding training procedures were developed under the leadership of the Rhön-Rossitten-Gesellschaft . Alexander Lippisch designed the pupil who was able to establish himself as the standard initial trainer. The wing of the monoplane had a rectangular floor plan, the "fuselage" consisted of an A-shaped frame that ended up in a kind of gable column that carried the wing. The seat and control elements were arranged on a solid “keel”. A fairing was also often attached, so that a fuselage nacelle was created, which somewhat reduced the aerodynamic drag.
Slope flights were possible with the pupil, but when the wind was actually strong enough for a significant lift, the conditions for safe flights were no longer given. Wolf Hirth carried out a revision of the pupil , instead of the wooden tail girders he used four steel tubes. In 1929 the construction drawings of the Hirth version came to the USA for the National Glider Association (NGA), which had recently been founded there . When the British Gliding Association (BGA) was founded later in the same year , the NGA sent these drawings back across the Atlantic to the BGA as a good-will act , with the London Gliding Club founded in January 1930 receiving one sentence.
Construction at RF Dagnall
RF Dagnall, owner of the RFD Company, who already had experience in building balloons and airships, offered the London Gliding Club to build a school sailor based on the modified pupil plans. The prototype was flown for the first time by members of the club on March 16, 1930. In the following months, 28 RFD specimens were produced, which were named after the manufacturer as Daglings ( Dag nall + Zög ling ). Regardless of their origin, it later became common practice to refer to all gliders of this type as daglings.
In 1932 Dagnall passed on the entire production of gliders to the British Aircraft Company , as he was already busy with government contracts. But after the death of CH Lowe-Wylde, the founder and chief designer of BAC, this company also gave up building gliders and Slingsby took over the construction of the Dagling.
Construction at Slingsby
Production at Slingsby began in 1933 and continued unchanged after the move from Scarborough to Kirbymoorside in autumn 1934. Some examples were also made by other companies, some even after the Second World War.
Technical specifications
| Parameter | Data |
|---|---|
| crew | 1 |
| length | 5.45 m |
| span | 10.07 m |
| Wing depth | 1.50 m |
| Wing area | 15.05 m² |
| Wing loading | 11.50 kg / m² |
| Wing extension | 6.72 |
| Empty mass | 82 kg |
| Max. Takeoff mass | 173 kg |
See also
literature
- Martin Simons: Sling's Sailplanes, Part 3. In: Airplane Monthly. September 1992, ISSN 0143-7240 , pp. 26-29.
Web links
- Photo and short history (accessed August 23, 2011)