The Braunschweig LF-1 Zaunkönig, (LF – Langsames Flugzeug – literally, slow aircraft), is a STOL single-seat light aircraft. It was designed in 1939 by Prof. Ing. Hermann Winter as a fool-proof trainer for novice student pilots to experience solo flight.
LF-1 Zaunkönig
The second Zaunkönig D-EBCQ preserved in the Deutsches Museum, Oberschleissheim, in July 2008
The LF-1 was designed by Prof. Dr.-Ing. Hermann Winter and some of his students from the Technische Universität Braunschweig (English:Technical University of Brunswick), Lower Saxony, Germany.[1] Winter was a former chief engineer at the Bulgarian company, DAR (Drzhavnata Aeroplanna Rabotilnitsa in Cyrillic ДАР – Държавната аеропланна работилница), where he created a line of aircraft; DAR-1, DAR-1A, DAR-2, DAR-3 Garvan, tri motor DAR-4, DAR 5 Brambar, DAR-6 and DAR-7 as well as the DAR Zdravka Vekilski and DAR Zdravka Toprakchiev gliders for the Bulgarian Army.
The LF-1 is a parasol wing monoplane with a high-set tailplane, powered by a Zündapp Z 9-092 engine delivering 37 kW (50 hp), able to operate from a 100 m (330 ft) airstrip. The two-piece wings are set at 16° dihedral and are supported by a pair of v cabane struts and v-struts either side from approx half-span to the lower centre fuselage. Full span leading edge slats extend automatically and full span trailing edge flaps / drooping ailerons can be extended manually by the pilot. The fixed tailwheel undercarriage attaches to the fuselage with long struts and oleo pneumatic shock absorbers.[2]
It was a proof-of-concept design for a 'fool-proof' trainer intended for novice pilots with only one hour of ground instruction, the hour being reduced to five-minutes for those who had already flown gliders, and was intended to be impossible to either stall or spin.[3]
Operational history
D-EBCG Fly by
The first prototype, the LF-1 V1, was built in 1940 and made its maiden flight, piloted by Winter himself, in December 1940. Test flights stopped in November 1942 after part of the wing ruptured causing the aircraft to crash. In 1943 a second prototype, the V2, was built, receiving the registrationD-YBAR. The aircraft was tested for military applications and was once even armed with a Panzerfaust 100 recoilless anti-tank weapon.
At the end of World War II the Zaunkönig registrationD-YBAR was taken to the Royal Aircraft Establishment (RAE) at Farnborough for slow flying tests; given the British serialVX190.,[1] where amongst others, it was flown by Eric "Winkle" Brown CO Aero Flight, the aircraft also being soloed by the then-head of the RAE Aerodynamics Section, Handel Davies, after half an hour of ground instruction, and whose only previous piloting experience was as a pupil in a dual-control Miles Magister.[3] It was sold to a British private owner in June 1949 as G-ALUA, and then to the Experimental Flying Group and to the Ultra Light Aircraft Association, subsequently in 1974 to an Irish owner, being registered EI-AYU, returning to Germany, in 1976, as D-EBCQ. As of 2008, it was preserved in the Deutsches Museum collection at Oberschleissheim near Munich.
Encouraged by the positive British reviews Prof. Ing. Hermann Winter decided to build a third LF-1. The construction started in 1954 and it was the first new aircraft in Germany after the war to receive a certificate by the Luftfahrt-Bundesamt (LBA) in Braunschweig and the registration D-EBAR. Winter envisioned the Zaunkönig as a People's Aircraft affordable for all (for a price of around DM 6,000).[citation needed]
At the time a fourth LF-1 V4 was already under construction and it flew a few months after the fatal accident with the V3. It received its certificate in 1958 and the registration D-ECER. This aircraft flew for some years in Germany until grounded after the death of Prof. Ing. Winter in 1968. It was restored in 1980 and flew until 1999 as D-EBCG and as of 2008 preserved in the collection of the Internationales Luftfahrtmuseum Manfred Pflumm near Villingen-Schwenningen.[4]
Specifications (LF-1)
Data from Die Deutsche Luftruestung 1933–1945 Vol.4 – Flugzeugtypen MIAG-Zeppelin[5]
General characteristics
Crew: 1
Length: 6.08 m (19 ft 11 in)
Wingspan: 8.02 m (26 ft 4 in)
Height: 2.38 m (7 ft 10 in)
Wing area: 8.5 m2 (91 sq ft)
Empty weight: 253 kg (558 lb)
Gross weight: 370 kg (816 lb)
Fuel capacity: 40 L (8.80 imp gal; 10.57 US gal) gasoline, 3.5 L (0.77 imp gal; 0.92 US gal) oil
^Nowarra, Heinz J. (1993). Die Deutsche Luftruestung 1933–1945 Vol.4 – Flugzeugtypen MIAG-Zeppelin (in German). Koblenz: Bernard & Graefe Verlag. pp. 41–42 & 46–47. ISBN3-7637-5464-4.
Bibliography
Green, William (1965), The Aircraft of the World, Macdonald & Co
Jackson, A.J. (1973), British Civil Aircraft since 1919 – Volume One, Putnam & Company Limited, ISBN0-370-10006-9
Ogden, Bob (2006), Aviation Museums and Collections of Mainland Europe, Air-Britain (Historians) Ltd, ISBN0-85130-375-7
External links
Wikimedia Commons has media related to LF1 Zaunkönig.
braunschweig, zaunkönig, langsames, flugzeug, literally, slow, aircraft, stol, single, seat, light, aircraft, designed, 1939, prof, hermann, winter, fool, proof, trainer, novice, student, pilots, experience, solo, flight, zaunkönigthe, second, zaunkönig, ebcq,. The Braunschweig LF 1 Zaunkonig LF Langsames Flugzeug literally slow aircraft is a STOL single seat light aircraft It was designed in 1939 by Prof Ing Hermann Winter as a fool proof trainer for novice student pilots to experience solo flight LF 1 ZaunkonigThe second Zaunkonig D EBCQ preserved in the Deutsches Museum Oberschleissheim in July 2008Role STOL light aircraftNational origin GermanyManufacturer Braunschweig University of TechnologyDesigner Hermann WinterFirst flight December 1940Number built 4 Contents 1 Design and development 2 Operational history 3 Specifications LF 1 4 See also 5 References 6 External linksDesign and development EditThe LF 1 was designed by Prof Dr Ing Hermann Winter and some of his students from the Technische Universitat Braunschweig English Technical University of Brunswick Lower Saxony Germany 1 Winter was a former chief engineer at the Bulgarian company DAR Drzhavnata Aeroplanna Rabotilnitsa in Cyrillic DAR Drzhavnata aeroplanna rabotilnica where he created a line of aircraft DAR 1 DAR 1A DAR 2 DAR 3 Garvan tri motor DAR 4 DAR 5 Brambar DAR 6 and DAR 7 as well as the DAR Zdravka Vekilski and DAR Zdravka Toprakchiev gliders for the Bulgarian Army The LF 1 is a parasol wing monoplane with a high set tailplane powered by a Zundapp Z 9 092 engine delivering 37 kW 50 hp able to operate from a 100 m 330 ft airstrip The two piece wings are set at 16 dihedral and are supported by a pair of v cabane struts and v struts either side from approx half span to the lower centre fuselage Full span leading edge slats extend automatically and full span trailing edge flaps drooping ailerons can be extended manually by the pilot The fixed tailwheel undercarriage attaches to the fuselage with long struts and oleo pneumatic shock absorbers 2 It was a proof of concept design for a fool proof trainer intended for novice pilots with only one hour of ground instruction the hour being reduced to five minutes for those who had already flown gliders and was intended to be impossible to either stall or spin 3 Operational history Edit D EBCG Fly by The first prototype the LF 1 V1 was built in 1940 and made its maiden flight piloted by Winter himself in December 1940 Test flights stopped in November 1942 after part of the wing ruptured causing the aircraft to crash In 1943 a second prototype the V2 was built receiving the registration D YBAR The aircraft was tested for military applications and was once even armed with a Panzerfaust 100 recoilless anti tank weapon At the end of World War II the Zaunkonig registration D YBAR was taken to the Royal Aircraft Establishment RAE at Farnborough for slow flying tests given the British serial VX190 1 where amongst others it was flown by Eric Winkle Brown CO Aero Flight the aircraft also being soloed by the then head of the RAE Aerodynamics Section Handel Davies after half an hour of ground instruction and whose only previous piloting experience was as a pupil in a dual control Miles Magister 3 It was sold to a British private owner in June 1949 as G ALUA and then to the Experimental Flying Group and to the Ultra Light Aircraft Association subsequently in 1974 to an Irish owner being registered EI AYU returning to Germany in 1976 as D EBCQ As of 2008 it was preserved in the Deutsches Museum collection at Oberschleissheim near Munich Encouraged by the positive British reviews Prof Ing Hermann Winter decided to build a third LF 1 The construction started in 1954 and it was the first new aircraft in Germany after the war to receive a certificate by the Luftfahrt Bundesamt LBA in Braunschweig and the registration D EBAR Winter envisioned the Zaunkonig as a People s Aircraft affordable for all for a price of around DM 6 000 citation needed At the time a fourth LF 1 V4 was already under construction and it flew a few months after the fatal accident with the V3 It received its certificate in 1958 and the registration D ECER This aircraft flew for some years in Germany until grounded after the death of Prof Ing Winter in 1968 It was restored in 1980 and flew until 1999 as D EBCG and as of 2008 preserved in the collection of the Internationales Luftfahrtmuseum Manfred Pflumm near Villingen Schwenningen 4 Specifications LF 1 EditData from Die Deutsche Luftruestung 1933 1945 Vol 4 Flugzeugtypen MIAG Zeppelin 5 General characteristicsCrew 1 Length 6 08 m 19 ft 11 in Wingspan 8 02 m 26 ft 4 in Height 2 38 m 7 ft 10 in Wing area 8 5 m2 91 sq ft Empty weight 253 kg 558 lb Gross weight 370 kg 816 lb Fuel capacity 40 L 8 80 imp gal 10 57 US gal gasoline 3 5 L 0 77 imp gal 0 92 US gal oil Powerplant 1 Zundapp Z9 092 4 cyl air cooled inverted in line piston engine 37 kW 50 hp Propellers 2 bladed wooden fixed pitch propeller 1 8 m 5 ft 11 in diameterPerformance Maximum speed 141 km h 88 mph 76 kn Cruise speed 125 km h 78 mph 67 kn Landing speed 46 km h 29 mph 25 kn Stall speed 50 km h 31 mph 27 kn Range 450 km 280 mi 240 nmi Service ceiling 3 820 m 12 530 ft Rate of climb 2 85 m s 561 ft min Time to altitude 1 000 m 3 300 ft in 6 minutes 42 secondsArmament 1x Panzerfaust 100 mounted above mainplane centre sectionSee also EditTucan T 1 I Ae 31 ColibriReferences EditNotes a b Jackson 1973 p 369 Green 1965 p 79 a b Brown Eric RN Wings on My Sleeve Orion books 2006 ISBN 978 0 297 84565 2 p 157 158 Ogden 2006 p 201 Nowarra Heinz J 1993 Die Deutsche Luftruestung 1933 1945 Vol 4 Flugzeugtypen MIAG Zeppelin in German Koblenz Bernard amp Graefe Verlag pp 41 42 amp 46 47 ISBN 3 7637 5464 4 BibliographyGreen William 1965 The Aircraft of the World Macdonald amp Co Jackson A J 1973 British Civil Aircraft since 1919 Volume One Putnam amp Company Limited ISBN 0 370 10006 9 Ogden Bob 2006 Aviation Museums and Collections of Mainland Europe Air Britain Historians Ltd ISBN 0 85130 375 7External links Edit Wikimedia Commons has media related to LF1 Zaunkonig TU Brunswick German 1 German 2 French Retrieved from https en wikipedia org w index php title Braunschweig LF 1 Zaunkonig amp oldid 1125784346, wikipedia, wiki, book, books, library,
