Dornier Do K
Dornier Do K | |
---|---|
Type: | Passenger plane |
Design country: | |
Manufacturer: |
Dornier works |
First flight: |
May 7, 1929 |
Number of pieces: |
3 prototypes |
The Dornier Do K was a German passenger aircraft, of which only three aircraft in different versions were built at the Dornier works in Friedrichshafen .
history
Claude Dornier developed a new airliner at the end of the 1920s, which was unsuccessful during the global economic crisis and due to the concept's inefficiency. In a comparison flight in Switzerland, the K3 of the first Ju 52 / 3m of Deutsche Luft Hansa was defeated . The project was discontinued due to disappointing flight performance.
construction
The three built prototypes K1, K2 and K3 differed significantly from each other.
Thu K1
The first Do K had a conventionally braced wing in a high- wing arrangement . A single Bristol Jupiter VI star engine powered the aircraft. The rectangular fuselage offered space for eight passengers and had an enclosed cockpit.
Thu K2
The second prototype essentially had a modified drive with two engine nacelles next to the fuselage, in each of which two Gnome Rhône radial engines worked in tandem.
Thu K3
The third prototype was a completely new design with an oval and elongated fuselage for now ten passengers and a new wing without struts. The wing shape was also found on Do 10 and Do Y again. A tail wheel replaced the tail spur. The engine pods were attached lower down the hull; Four Czechoslovak Walter Castor star engines were used as drive . The front engines had four-blade propellers; the rear pusher propeller only had two blades.
Technical specifications
Parameter | Data of the K1 | Data of the K2 | Data of the K3 |
---|---|---|---|
crew | 2 | 2 | |
Passengers | 8th | 10 | |
length | 15.25 m | 15.00 m | 16.5 m |
span | 20.60 m | 25 m | |
height | 4.50 m | 4.10 m | 4.2 m |
Wing area | 76.0 m² | 88 m² | |
Wing extension | 5.6 | 7.1 | |
Empty mass | 2700 kg | 3400 kg | 3600 kg |
payload | 1400 kg | 1600 kg | k. A. |
Max. Takeoff mass | 4100 kg | 5000 kg | 6000 kg |
Top speed | 190 km / h near the ground | 195 km / h near the ground | 220 km / h |
Cruising speed | k. A. | k. A. | 200 km / h |
Rise time | 17.5 min at 2000 m | 18 min at 2000 m | k. A. |
Service ceiling | 3100 m | 2800 m | 6300 m |
Range | 700 km | k. A. | k. A. |
Engine (s) | a Siemens Jupiter-VI-U star engine with 450 HP (approx. 330 kW) |
four Gnome-Rhône-Titan radial engines with 240 HP each (approx. 180 kW) |
four Walter Castor star engines , each with 240 hp (approx. 180 kW) |
gallery
K3, recorded by the Swiss aviation pioneer Walter Mittelholzer
In Zeppelin shape built hull of the Do K3
See also
literature
- Dornier Foundation for Aviation and Space Travel (Ed.): Dornier. Plant history and aircraft types . Delius Klasing, Bielefeld 2009, ISBN 978-3-7688-2610-5 .
- Günter Frost, Karl Kössler , Volker Koos: Dornier . From the beginning until 1945. Heel, Königswinter 2010, ISBN 978-3-86852-049-1 , p. 104/105 and 123-125 .
Web links
- "Do K" Shows Speed in German Test Flights. In: Popular Mechanics . May 1932, p. 779 , accessed July 2, 2017 .
Individual evidence
- ^ The Zurich Meeting. (PDF; 320 kB) Circuit of the Alps (Commercial Aircraft). In: FLIGHT, AUGUST 5, 1932. Flightglobal.com, August 5, 1932, p. 726 , accessed on October 18, 2019 (English): “Five machines had been entered for this contest, and three finished. They were a Junkers three-engined "Ju.52" (Hornet), a Dornier four-engined "Do.K" (Walter), and a Fokker three-engined "F.VII" (Wright). The "Ju.52" secured first place, the "Do.K" second, and the * 'F.VII "third."
- ^ A b Edwin PA Heinze: The New Dornier Landplane. (PDF; 260 kB) In: FLIGHT, OCTOBER 30, 1931. Flightglobal.com , October 30, 1931, pp. 1165–1167 , accessed on October 18, 2019 (English): “Owing to the kindness of the makers, which we duly acknowledge, the writer has received further interesting details of the machine, which give a good idea of the constructional features of the plane. "
- ^ A b Günter Frost, Karl Kössler, Volker Koos: Dornier . From the beginning until 1945. Heel, Königswinter 2010, ISBN 978-3-86852-049-1 , p. 105 .
- ^ A New Dornier Machine. (PDF; 280 kB) The Do-K Twin-Tandem Engined Monoplane. In: FLIGHT, OCTOBER 9, 1931. Flightglobal.com, October 9, 1931, p. 1014 , accessed on October 18, 2019 : “In his latest type Dr. Claudius Dornier has departed considerably from what has come to be regarded as standard Dornier practice. "