"Do 29" redirects here. For the original aircraft with this designation, see Dornier Do 29 (1934). For the diode package, see DO-29.
The Dornier Do 29 was an experimental aircraft developed by Dornier Flugzeugwerke and the Deutsche Versuchsanstalt für Luftfahrt (German Aviation Laboratory) in the 1950s, used to test a tilting-propeller system for short takeoff and landing (STOL) aircraft. The concept was proved successful in flight testing; however, no further development of the system or aircraft was proceeded with, and at the conclusion of its test program the Do 29 was retired.
During the Second World War, Heinrich Focke of Focke-Achgelis, a manufacturer of helicopters, developed a design for a short-takeoff-and-landing aircraft that would utilise a system of pusher propellers, one on each wing in a pusher configuration, to provide downward thrust and enhance lift.[1] Designated Fa 269, the design was not developed due to the state of the war.[1]
In the 1950s, however, a renewed interest in STOL and VTOL aircraft led to a re-evaluation of Focke's concept. Dornier was given a contract to develop an aircraft capable of demonstrating the tilting-propeller system. The aircraft, given the designation Do 29, was based on the Do 27 light transport, modified with twin Lycoming GO-480 engines mounted below the wings.[1] These engines drove three-bladed, pusher propellers, that were capable of being tilted downwards to an angle of up to 90 degrees, and the engines were coupled so that symmetrical thrust could be maintained in the event of an engine failure.[1]
The forward fuselage was also modified with a helicopter-like cockpit. A Martin-Bakerejection seat was provided for pilot escape in the event of an emergency.[2] The previous Dornier Do-27 had capacity for 4 or 5 passengers, while the Do-29 was expected to have similar passenger numbers at 4 to 6 passengers.[3]
Testingedit
The Do 29 at the Dornier Museum
Two examples of the Do 29 were constructed, while a third was planned but not built, with the first prototype flying on 12 December 1958.[2] In the following flight testing, the propeller system was not rotated further than 60 degrees as opposed to its nominal 90 degree capability,[1] but the aircraft proved to be highly successful, with a stalling speed of 24 kilometres per hour (15 mph) and exceptional short-field performance.[1] The aircraft did have some issues during testing, as in July 1962, 1 of the 2 Do-29's was damaged and was written off. The 2nd remaining aircraft continued testing for another year before it was retired.[3] The aircraft was expected to have a 82 foot takeoff run, but it turned out the Do-29 needed a 262 foot takeoff run and 147 feet for landing.[3]
Following testing, the Do-29's the tilting-propeller system was not further pursued after the end of the flight test program.[1]
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Do 29 redirects here For the original aircraft with this designation see Dornier Do 29 1934 For the diode package see DO 29 The Dornier Do 29 was an experimental aircraft developed by Dornier Flugzeugwerke and the Deutsche Versuchsanstalt fur Luftfahrt German Aviation Laboratory in the 1950s used to test a tilting propeller system for short takeoff and landing STOL aircraft The concept was proved successful in flight testing however no further development of the system or aircraft was proceeded with and at the conclusion of its test program the Do 29 was retired Do 29Do 29 on display at the Dornier MuseumRole Experimental aircraftNational origin GermanyManufacturer Dornier FlugzeugwerkeFirst flight 12 December 1958Primary user DFLProduced 2Developed from Dornier Do 27 Contents 1 Design and development 2 Testing 3 Aircraft on display 4 Operators 5 Specifications Do 29 6 See also 7 References 8 External linksDesign and development editDuring the Second World War Heinrich Focke of Focke Achgelis a manufacturer of helicopters developed a design for a short takeoff and landing aircraft that would utilise a system of pusher propellers one on each wing in a pusher configuration to provide downward thrust and enhance lift 1 Designated Fa 269 the design was not developed due to the state of the war 1 In the 1950s however a renewed interest in STOL and VTOL aircraft led to a re evaluation of Focke s concept Dornier was given a contract to develop an aircraft capable of demonstrating the tilting propeller system The aircraft given the designation Do 29 was based on the Do 27 light transport modified with twin Lycoming GO 480 engines mounted below the wings 1 These engines drove three bladed pusher propellers that were capable of being tilted downwards to an angle of up to 90 degrees and the engines were coupled so that symmetrical thrust could be maintained in the event of an engine failure 1 The forward fuselage was also modified with a helicopter like cockpit A Martin Baker ejection seat was provided for pilot escape in the event of an emergency 2 The previous Dornier Do 27 had capacity for 4 or 5 passengers while the Do 29 was expected to have similar passenger numbers at 4 to 6 passengers 3 Testing edit nbsp The Do 29 at the Dornier MuseumTwo examples of the Do 29 were constructed while a third was planned but not built with the first prototype flying on 12 December 1958 2 In the following flight testing the propeller system was not rotated further than 60 degrees as opposed to its nominal 90 degree capability 1 but the aircraft proved to be highly successful with a stalling speed of 24 kilometres per hour 15 mph and exceptional short field performance 1 The aircraft did have some issues during testing as in July 1962 1 of the 2 Do 29 s was damaged and was written off The 2nd remaining aircraft continued testing for another year before it was retired 3 The aircraft was expected to have a 82 foot takeoff run but it turned out the Do 29 needed a 262 foot takeoff run and 147 feet for landing 3 Following testing the Do 29 s the tilting propeller system was not further pursued after the end of the flight test program 1 Aircraft on display editOne of the Do 29 prototypes survived the program and is displayed in the Dornier Museum in Friedrichshafen Germany 1 Operators edit nbsp GermanyLuftwaffeSpecifications Do 29 edit nbsp Detail of propeller assemblyData from 1 4 General characteristicsCrew one pilot Length 9 5 m 31 ft 2 in Wingspan 13 2 m 43 ft 4 in Height 2 69 m 8 ft 10 in 5 Wing area 21 8 m2 235 sq ft Empty weight 2 180 kg 4 806 lb Gross weight 2 400 kg 5 291 lb 5 Max takeoff weight 2 490 kg 5 490 lb Powerplant 2 Lycoming GO 480 B1A6 geared horizontally opposed piston engines 200 kW 270 hp each Propellers 3 bladedPerformance Maximum speed 290 km h 180 mph 160 kn Minimum control speed 24 km h 15 mph 13 kn Range 400 km 250 mi 220 nmi Service ceiling 6 500 m 21 300 ft See also edit nbsp Aviation portal nbsp Germany portalAircraft of comparable role configuration and era Vertol VZ 2 Ryan VZ 3 Fairchild VZ 5Related lists List of experimental aircraft List of military aircraft of GermanyReferences editNotes a b c d e f g h i Goebel Greg Dornier Civil Aircraft Archived June 12 2010 at the Wayback Machine VectorSite April 2010 Accessed 2010 06 10 a b Luftwaffe Projekte Do 29 In Geschichte der Luftwaffe Bundeswehr Accessed 2009 06 15 a b c McDowell Jason 2022 05 10 Dornier s Do 29 Broke Ground in STOL Before It Was Fashionable FLYING Magazine Retrieved 2024 02 17 Winchester 2005 pp 84 85 a b Green 1960 p 90 1 BibliographyGreen William Observer s book of aircraft 1960 ed London Frederick Warne amp Co Ltd Winchester Jim ed Aviation Factfile Concept Aircraft San Diego CA Thunder Bay Press ISBN 1 59223 480 1External links edit nbsp Wikimedia Commons has media related to Dornier Do 29 http www 1000aircraftphotos com Contributions Visschedijk 6709 htm Archived 2011 09 27 at the Wayback Machine Retrieved from https en wikipedia org w index php title Dornier Do 29 amp oldid 1212270806, wikipedia, wiki, book, books, library,
