LFG V 13
| LFG V 13 "Strela" | |
|---|---|
| Type: | Passenger plane |
| Design country: | |
| Manufacturer: | |
| First flight: |
1921 |
| Number of pieces: |
12 |
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The LFG V 13 Strela was a German swimmer - passenger aircraft of the aircraft company mbH, whose sole construction that after the end of World War I , together with their countrymen execution V 130 was built in any significant quantity.
development
After the LFG shipyard for seaplanes based in Stralsund had released its first civilian types for the transport of people in 1919 with the V 1 and V 2 , both of which arose from the conversion of the FF 49c naval reconnaissance aircraft, it developed the V in 1920 with the V 13 their first purely civil aircraft type. The construction of a small series was carried out despite the production and import ban on German aircraft set out in the Versailles Treaty and which came into force in January 1920. During a review by the Interallied Aviation Monitoring Commission (ILÜK) it was found in December 1920 that the LFG had illegally manufactured twelve V 13s. On July 23, 1921, the latter in turn admitted the construction of only ten aircraft, two of which were only half completed. The following August, the Reichs-Treuhandgesellschaft (RTG), which was responsible for the removal of aircraft that did not comply with the contractual provisions, came to the same conclusion as the ILÜK. Despite this violation, however, for unknown reasons, no destruction of the built V 13 was ordered and the ILÜK finally classified the model as civil on April 28, 1922, thus allowing its use. The twelve V 13s, including two copies without an engine, were offered for sale in Sweden in January 1923, but Sweden only acquired one aircraft and used it as the S-AOAA . Others are said to have gone to Finland or Norway or had accidents before they were sold. The literature occasionally mentions only six V 13s built, but the partially reconstructed aircraft role from 1919 to 1934 lists seven examples that were used by German operators. Another with the registration D-588 is indicated as V 13 with conversion to the land version V 130 in March 1928, but the date of registration indicated as 1925 suggests that this specimen was a pure V 130.
The successor appeared around 1924/1925 with a wheeled chassis, but otherwise identical in construction. Both types were also known as Strela-See (V 13) or Strela-Land (V 130).
commitment
The first V 13 with the serial number 85 was acquired by Aero-Sport GmbH in Warnemünde around 1924, where it was used quite successfully for sightseeing flights with the registration number D – 160 , including the first flight day it organized on August 24, 1924 in the region since the end of the war. The Baltic baths in Arendsee , Brunshaupten , Graal , Heiligendamm and Fischland also ordered the V 13 for the sightseeing flights that are very popular with bathers during the season in a simple way, mostly by telephone. The effects of the global economic crisis forced the company, the aircraft to the Norwegian in April 1929 Norske Luftruter A / S in Oslo to sell it as N 31 began.
Another V 13 with the serial number 91 was taken over by the Deutsche Verkehrsfliegerschule (DVS) in Warnemünde and set it with the D-402 mark over a long period of time for taking the B test, for practicing target or night landings and for transporting cargo or Passengers a. The aircraft, also known as the "manatee", proved to be indestructible and was flown by the flight students with pleasure. It was not decommissioned until March 1932.
The LFG itself used the V 13 to set up some coastal airlines and used it to fly the routes Hamburg - Stettin - Danzig and Stettin - Swinoujscie - Stralsund.
construction
The V 13 was a strained, dreistieliger biplane in wood construction with a rectangular fuselage cross-section, closed passenger cabin and an open cockpit, in the unusual manner, the fuel tank was accommodated. The cabin was accessible through a door on the left. The upper and lower wings with two spars consisted of a fabric-covered wooden frame, were connected to one another by I-posts and crossed out with tensioning wires. Both had ailerons connected by bumpers . The lower wing was attached to the lower edge of the fuselage; the upper wing was connected to the fuselage by a tombstone. The tail unit was of normal construction, had a split elevator and a rudder pulled far below the stern . Both were fabric-covered duralumin structures , the horizontal and vertical fin were made of wood and fabric. The floats had a step and a flat top.
Technical specifications
| Parameter | Dates (with item IIIa) | Dates (with Bz IV) |
|---|---|---|
| crew | 1 | |
| Passengers | 4th | |
| span | 17.50 m | |
| length | 10.90 m | |
| height | 3.88 m | |
| Wing area | 70.00 m² | |
| Wing loading | 30.29 kg / m² | 30.4 kg / m² |
| Power load | 11.50 kg / hp (15.59 kg / kW) | 10.6 kg / hp |
| Area performance | 2.64 m² / PS (1.94 kW / m²) | |
| Preparation mass | 1460 kg | |
| payload | 335 kg | 280 kg |
| Payload | 660 kg | 700 kg |
| Takeoff mass | 2120 kg | 2160 kg |
| drive | a water-cooled six - cylinder in - line engine | |
| Type | Benz Bz IIIa | Benz Bz IV |
| rated capacity | 185 hp (136 kW) at 1400 rpm | 200 hp (147 kW) at 1300 rpm |
| Top speed | 135 km / h near the ground | 140 km / h near the ground |
| Cruising speed | 120 km / h near the ground | |
| Landing speed | 80 km / h | 60 km / h |
| Rate of climb | 1.70 m / s | |
| Service ceiling | 3500 m | 4000 m |
| Range | maximum 720 km | maximum 770 km |
| Flight duration | maximum 6 h | |
literature
- Wolfgang Wagner: German air traffic - the pioneering years 1919–1925. Bernard & Graefe, Koblenz 1987, ISBN 3-7637-5274-9 , pp. 229/230.
- Heinz AF Schmidt: Historic aircraft. Volume II. Transpress, Berlin 1970, p. 40.
Individual evidence
- ↑ Lennart Anderson: The strongest survived - Part 1: From AEG to Zeppelin. In: Fliegerrevue Extra. No. 21. Möller, 2008, ISSN 0941-889X, pp. 66-69.
- ^ Karl Ries: Research on the German aviation role. Part 1: 1919-1934. Dieter Hoffmann, Mainz 1977, ISBN 3-87341-022-2 , pp. 24, 27, 31, 32, 37, 49 and 78.
- ↑ Volker Koos: Aviation between the Baltic Sea and Breitling. Transpress, Berlin 1990, ISBN 3-344-00480-8 , pp. 55, 80 and 131.
- ↑ Bruno Lange: Type manual of German aviation technology. (= German aviation. Volume 9). Bernard & Graefe, Koblenz 1986, ISBN 3-7637-5284-6 , p. 207.
- ^ Hans-Jürgen Becker: Seaplanes - flying boats, amphibians, float planes. (= German aviation. Volume 21). Bernard & Graefe, Bonn 1994, ISBN 3-7637-6106-3 , pp. 103/104.