The Göppingen Gö 9 was a German research aircraft built to investigate the practicalities of powering a plane using a pusherpropeller located far from the engine and turned by a long driveshaft.
In 1937, Claudius Dornier observed that adding extra engines and propellers to an aircraft in an attempt to increase speed would also attract a penalty of greater drag, especially when placing two or more engines within nacelles mounted on the wings. He reasoned that this penalty could be minimized by mounting a second propeller at the rear of an aircraft. In order to prevent tail-heaviness, however, the engine would need to be mounted far ahead of it. Dornier patented this idea and commissioned a test plane to evaluate it.
The aircraft was designed by Dr Ulrich Hütter as a 40% sized, scaled-down version of the Dornier Do 17's fuselage and wing panels without the twin-engine nacelles, and built by Schempp-Hirth. The airframe was entirely of wood and used a retractable tricycle landing gear – one of the earliest non-Heinkel-built German airframe designs to use such an arrangement. Power was supplied by a Hirth HM 60 inverted, air-cooled inline four-cylinder engine mounted within the fuselage near the wings. Other than the engine installation, the only other unusual feature of the aircraft was its all-new, full four-surface cruciform tail, which included a large ventral fin/rudder unit of equal area to the dorsal surface. This fin incorporated a small supplementary tailwheel protruding from the ventral fin's lower tip that assisted in keeping the rear-mounted, four-blade propeller away from tailstrike damage against the ground during take-off and landing. The Gö 9 carried the civil registration D-EBYW.
Operational historyedit
Initially towed aloft, flight tests began in June 1941, but later flights operated under its own power. The design validated Dornier's ideas, and he went ahead with his original plan to build a high-performance aircraft with propellers at the front and rear, producing the Dornier Do 335. The eventual fate of the Gö 9 is not known.
Specifications (Gö 9)edit
Data from Die Deutsche Luftruestung 1933-1945 Vol.1 - AEG-Dornier[1]
^Nowarra, Heinz J. (1993). Die Deutsche Luftruestung 1933-1945 Vol.1 - AEG-Dornier. Koblenz: Bernard & Graefe Verlag. ISBN3-7637-5464-4.
Bibliographyedit
Nowarra, Heinz J. (1993). Die Deutsche Luftruestung 1933-1945 Vol.1 - AEG-Dornier. Koblenz: Bernard & Graefe Verlag. ISBN3-7637-5464-4.
Selinger, P E. Segelflugzeuge Vom Wolf zum Discus. Motor Buch Verlag, Stuttgart 1989
External linksedit
Wikimedia Commons has media related to Göppingen Gö-9.
Video of Do 335A and Göppingen Gö 9 tests
December 15, 2023
göppingen, german, research, aircraft, built, investigate, practicalities, powering, plane, using, pusher, propeller, located, from, engine, turned, long, driveshaft, 9role, research, aircraftnational, origin, nazi, germanymanufacturer, schempp, hirthdesigner,. The Goppingen Go 9 was a German research aircraft built to investigate the practicalities of powering a plane using a pusher propeller located far from the engine and turned by a long driveshaft Go 9Role Research aircraftNational origin Nazi GermanyManufacturer Schempp HirthDesigner Ulrich HutterFirst flight 1941Number built 1Developed from Dornier Do 17 Contents 1 Design and development 2 Operational history 3 Specifications Go 9 4 See also 5 References 5 1 Citations 5 2 Bibliography 6 External linksDesign and development editIn 1937 Claudius Dornier observed that adding extra engines and propellers to an aircraft in an attempt to increase speed would also attract a penalty of greater drag especially when placing two or more engines within nacelles mounted on the wings He reasoned that this penalty could be minimized by mounting a second propeller at the rear of an aircraft In order to prevent tail heaviness however the engine would need to be mounted far ahead of it Dornier patented this idea and commissioned a test plane to evaluate it The aircraft was designed by Dr Ulrich Hutter as a 40 sized scaled down version of the Dornier Do 17 s fuselage and wing panels without the twin engine nacelles and built by Schempp Hirth The airframe was entirely of wood and used a retractable tricycle landing gear one of the earliest non Heinkel built German airframe designs to use such an arrangement Power was supplied by a Hirth HM 60 inverted air cooled inline four cylinder engine mounted within the fuselage near the wings Other than the engine installation the only other unusual feature of the aircraft was its all new full four surface cruciform tail which included a large ventral fin rudder unit of equal area to the dorsal surface This fin incorporated a small supplementary tailwheel protruding from the ventral fin s lower tip that assisted in keeping the rear mounted four blade propeller away from tailstrike damage against the ground during take off and landing The Go 9 carried the civil registration D EBYW Operational history editInitially towed aloft flight tests began in June 1941 but later flights operated under its own power The design validated Dornier s ideas and he went ahead with his original plan to build a high performance aircraft with propellers at the front and rear producing the Dornier Do 335 The eventual fate of the Go 9 is not known Specifications Go 9 editData from Die Deutsche Luftruestung 1933 1945 Vol 1 AEG Dornier 1 General characteristicsCrew 1 Length 6 80 m 22 ft 4 in Wingspan 7 20 m 23 ft 7 in Gross weight 720 kg 1 587 lb Powerplant 1 Hirth HM 60 4 cyl inverted air cooled in line piston engine 60 kW 80 hp Propellers 4 bladed pusher propeller turned via an extension shaftPerformance Maximum speed 220 km h 140 mph 120 kn See also editAircraft of comparable role configuration and era Paulhan Tatin Aero Torpille No 1 Douglas XB 42Related lists List of military aircraft of Germany List of World War II military aircraft of GermanyReferences editCitations edit Nowarra Heinz J 1993 Die Deutsche Luftruestung 1933 1945 Vol 1 AEG Dornier Koblenz Bernard amp Graefe Verlag ISBN 3 7637 5464 4 Bibliography edit Nowarra Heinz J 1993 Die Deutsche Luftruestung 1933 1945 Vol 1 AEG Dornier Koblenz Bernard amp Graefe Verlag ISBN 3 7637 5464 4 Selinger P E Segelflugzeuge Vom Wolf zum Discus Motor Buch Verlag Stuttgart 1989External links edit nbsp Wikimedia Commons has media related to Goppingen Go 9 Video of Do 335A and Goppingen Go 9 tests Retrieved from https en wikipedia org w index php title Goppingen Go 9 amp oldid 1108433020, wikipedia, wiki, book, books, library,
