Dornier Do K

Dornier Do K
Type:	Passenger plane
Design country:	German Empire
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

Motor pod of the Do K3 with Walter Castor star motors in tandem arrangement and two-winged push and four-winged pull propellers, Berlin-Tempelhof 1932

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

Three-sided view Do K3

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
Cockpit of the K3 with a view of the steering wheel, engine lever
In Zeppelin shape built hull of the Do K3
K3 over Tempelhof Airport in January 1932

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

Commons : Dornier Do K - collection of images, videos and audio files

"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. "

[FLIGHT,_AUGUST_5,_1932-1] 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."

[FLIGHT,_OCTOBER_30,_1931-2] 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. "

[Frost/Kössler/Koos,_Dornier-3] 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 .

[FLIGHT,_OCTOBER_9,_1931-4] 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. "


Before 1930:	Rs I • Rs II • Rs III • Rs IV • DI • Do A • Do B (Mercury) • Do C • Do C III • Do D • Spatz • Do F • Do H • Do J (whale) • Do K • Do N • Do P • Do R (Superwal) • Do Y • Do X
From 1930 to 1945:	Thu 10 • Thu 11 • Thu 12 • Thu 13 • Thu 14 • Thu 15 • Thu 16 • Thu 17 • Thu 18 • Thu 19 • Thu 20 • Thu 22 • Thu 23 • Thu 24 • Thu 26 • Thu 212 • Thu 214 • Do 215 • Do 216 • Do 217 • Do 235 • Do 317 • Do 318 • Do 335 • Do 417 • Do 435 • Do 535 • Do 635 • P 247
Since 1945:	Do 25 • Do 27 • Do 28 • Do 29 • Do 30 • Do 31 • Do 32 • Do 34 • Do 128 • Do 132 • Do 228 • Do 231 • Do 328 • P 406 • P 410 • Do 428 • Do 528 • Do 728 • Do 928