Sablatnig PI

from Wikipedia, the free encyclopedia
Sablatnig PI
Sablatnig PI L'Aerophile January, 1921.jpg
Type: Passenger plane
Design country:

German EmpireGerman Empire German Empire

Manufacturer:

Sablatnig

First flight:

April 16, 1919

Commissioning:

1919

Production time:

1919/1920

Number of pieces:

14th

The Sablatnig PI ( Sab PI for short ) was a commercial aircraft from Sablatnig Flugzeugbau GmbH and the first German aircraft to fly abroad on April 21, 1919 after the end of the First World War , thus laying the foundations for the development of national civil aviation in Germany .

development

Josef Sablatnig and Hans Seehase constructed the PI on the basis of the NI night bomber , which in 1918 was given a civilian version with a closed cabin for two people. During the test phase of the N I, they planned to enlarge the cabin to carry four passengers. It was supposed to offer greater comfort and was therefore equipped with electric light, heating and a folding table. A side wall that could be folded up made entry easier. The cell was taken over from the N I almost unchanged. In February 1919 the conversion of an N I began, which dragged on until the beginning of April 1919 due to delivery problems and incorrectly manufactured parts. The construction of the prototype was completed on the 5th of the month, and the first test run of the engine was completed one day later. The aircraft was then dismantled and taken from the Sablatnig factory site in Kreuzberg to the Johannisthal airfield on April 14th and 15th , where Sablatnig carried out the first flight, which ran smoothly, one day later. After another flight on April 19, Sablatnig took off on the first international flight of a German aircraft after the end of the war, which led via Warnemünde to Copenhagen . Then some improvements were made to the aircraft, the rounded cabin windows were replaced by larger, square with split panes and an additional tank was built into the casing of the landing gear axle. It then received approval as the D-91 and series production began. Two more flights with the D-103 to Stockholm and again to Copenhagen resulted in the establishment of Dansk Luft Ekspress and an order for eleven P I, of which only three to four were delivered from May 1919 due to Allied restrictions. In the following, production was repeatedly impaired by the ILÜK . Although the PI had confirmed this as a civilian model after an inspection of the Sablatnig site on March 10, 1920, Sablatnig, like other German manufacturers, tried to produce more aircraft than had been approved for construction and at the same time to export as many copies as possible abroad in order to remove them from the access of the allies, which is why they repeatedly ordered the destruction of individual types. After seven P I's were officially registered in 1919 - including those delivered to Denmark - and after June 1920 a further seven P I's, the company's own Lloyd-Luftverkehr Sablatnig reported on June 23, 1921 that there were still five P I's with the designations D – 3 to D– 6 and D-94 . Almost two years later, the fleet of the German Aero-Lloyd , which was founded on February 6, 1923 and in which the Sablatnig airline was merged, had four more P I's.

Technical specifications

Parameter Data
crew 1
Passengers 4th
span 16.00 m
length 8.70 m
height 3.20 m
Wing area 54.80 m²
Preparation mass 1180 kg
payload 351 kg
Payload 680 kg
Takeoff mass 1860 kg
Wing loading 33.94 kg / m²
Power load 8.09 kg / hp (11.00 kg / kW)
Mass / power ratio 4.20 PS / m² (3.08 kW / m²)
Share of payload / take-off weight 37%
drive a water-cooled six - cylinder in - line engine
Type Benz Bz IV
Starting power
rated power
230 PS (169 kW)
200 PS (147 kW) at 1400 rpm
consumption 46.00 kg / h
Top speed 135 km / h near the ground
Cruising speed 125 km / h near the ground
Rate of climb 2.00 m / s
Landing speed 80 km / h
Service ceiling 4700 m
Range 625 km
Flight duration maximum 5 h

literature

  • Karl-Dieter Seifert: Josef Sablatnig, Sablatnig Flugzeugbau and its chief designer Hans Seehase . 1st edition. Nora, Berlin 2002, ISBN 3-935445-63-6 , pp. 74 ff .
  • Wolfgang Wagner: German air traffic - the pioneering years 1919–1925 . Bernard & Graefe, Koblenz 1987, ISBN 3-7637-5274-9 , pp. 257 .

Web links

Commons : Sablatnig NI  - collection of pictures, videos and audio files

Individual evidence

  1. Seifert, p. 74
  2. Lennart Anderson: The strongest survived - Part 1: From AEG to Zeppelin . In: Fliegerrevue Extra . No. 21 . Möller, 2008, ISSN  0941-889X , p. 56-58 .
  3. ^ Wagner, p. 263