The fs24 was the first glider to use fibreglass in its construction. The development of modern aerofoil sections for gliders required very accurate reproduction with smooth surfaces, using tolerances that were extremely difficult to achieve using conventional wood or metal construction, but could be achieved by using composite materials laid up in a mould.
The design of the fs24 was started at Akaflieg Stuttgart, (Akademische Fliegergruppe - academic flying group), by Richard Eppler and Hermann Nägele in 1951. Originally it was constructed of balsa wood with a strengthened outer layer of paper and glue layers, which proved unsatisfactory. The project was abandoned until a grant for further research was received from the state of Baden-Württemberg. By then glass fibre reinforced polyester resin was available and so it was redesigned using a balsa wood/glass fibre sandwich, with the load-bearing points and the edge of the cockpit canopy strengthened with plywood.
The first flight was made on 27 November 1957, and good performance and excellent handling were demonstrated, especially in weak thermal conditions. The prototype had a conventional tail unit and a bumper instead of a conventional undercarriage. Airbrakes were fitted on the underside of the wing trailing edges.
Bölkow built eight fs24s, designated Phönix T, differing in the use of a T-tail and retractable undercarriage.[1]
Variantsedit
fs24 Phönix
16m sailplane certified in January 1959 and manufactured by Akademische Fliegergruppe Stuttgart
fs24 Phönix TO
16m sailplane with a T-tail certified in May 1960 and manufactured by Apparatebau Nabern.
fs24 Phönix T
16m sailplane certified in April 1961 and manufactured by Apparatebau Nabern.
^Akaflieg Stuttgart 90 Jahre Forschen-Bauen-Fliegen (in German) (1st ed.). Stuttgart: Akaflieg Stuttgart e.V. 2016. pp. 187–196.
^. Archived from the original on 23 September 2015. Retrieved 13 June 2013.
^. Archived from the original on 5 March 2016. Retrieved 13 June 2013.
^Shenstone, B.S.; K.G. Wilkinson; Peter Brooks (1958). The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs dans Le Monde (in French and German) (1st ed.). Zurich: Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue. pp. 51–54.
^"fs 24 - Phönix". Stuttgart University. Retrieved 13 June 2013.
. Archived from the original on 5 March 2016. Retrieved 13 June 2013.
. Archived from the original on 23 September 2015. Retrieved 13 June 2013.
Shenstone, B.S.; K.G. Wilkinson; Peter Brooks (1958). The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs dans Le Monde (in French and German) (1st ed.). Zurich: Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue. pp. 51–54.
External linksedit
Wikimedia Commons has media related to Akaflieg Stuttgart fs24.
Akaflieg Stuttgart website
April 13, 2024
akaflieg, stuttgart, fs24, nicknamed, phönix, german, phoenix, glider, designed, built, west, germany, from, 1951, fs24, phönixfs24, deutsches, museum, munichrole, sailplanenational, origin, west, germanymanufacturer, akaflieg, stuttgartdesigner, richard, eppl. The Akaflieg Stuttgart fs24 nicknamed Phonix German Phoenix was a glider designed and built in West Germany from 1951 fs24 Phonixfs24 in the Deutsches Museum in MunichRole SailplaneNational origin West GermanyManufacturer Akaflieg StuttgartDesigner Richard Eppler and Hermann NageleFirst flight 27 November 1957Number built 9 Contents 1 Design and development 2 Variants 3 Surviving aircraft 4 Specifications 5 See also 6 References 6 1 Notes 6 2 Bibliography 7 External linksDesign and development editThe fs24 was the first glider to use fibreglass in its construction The development of modern aerofoil sections for gliders required very accurate reproduction with smooth surfaces using tolerances that were extremely difficult to achieve using conventional wood or metal construction but could be achieved by using composite materials laid up in a mould The design of the fs24 was started at Akaflieg Stuttgart Akademische Fliegergruppe academic flying group by Richard Eppler and Hermann Nagele in 1951 Originally it was constructed of balsa wood with a strengthened outer layer of paper and glue layers which proved unsatisfactory The project was abandoned until a grant for further research was received from the state of Baden Wurttemberg By then glass fibre reinforced polyester resin was available and so it was redesigned using a balsa wood glass fibre sandwich with the load bearing points and the edge of the cockpit canopy strengthened with plywood The first flight was made on 27 November 1957 and good performance and excellent handling were demonstrated especially in weak thermal conditions The prototype had a conventional tail unit and a bumper instead of a conventional undercarriage Airbrakes were fitted on the underside of the wing trailing edges Bolkow built eight fs24s designated Phonix T differing in the use of a T tail and retractable undercarriage 1 Variants editfs24 Phonix 16m sailplane certified in January 1959 and manufactured by Akademische Fliegergruppe Stuttgart fs24 Phonix TO 16m sailplane with a T tail certified in May 1960 and manufactured by Apparatebau Nabern fs24 Phonix T 16m sailplane certified in April 1961 and manufactured by Apparatebau Nabern Surviving aircraft editThe prototype fs24 Phonix is on display at the Deutsches Museum in Munich Germany 2 D 8353 is part of the collection of the Deutsches Segelflugmuseum at Wasserkuppe Germany 3 Specifications edit nbsp FS 24 StampData from The World s Sailplanes Die Segelflugzeuge der Welt Les Planeurs du Monde 4 5 General characteristicsCrew 1 Length 6 84 m 22 ft 5 in Wingspan 16 m 52 ft 6 in Height 0 95 m 3 ft 1 in Wing area 14 36 m2 154 6 sq ft Aspect ratio 17 83 Airfoil EC 86 3 914 Empty weight 161 7 kg 356 lb Max takeoff weight 265 kg 584 lb Performance Stall speed 43 km h 27 mph 23 kn Never exceed speed 140 km h 87 mph 76 kn Rough air speed max 100 km h 62 1 mph 54 0 kn Aerotow speed 100 km h 62 1 mph 54 0 kn Winch launch speed 90 km h 55 9 mph 48 6 kn g limits 4 2 Maximum glide ratio 37 at 77 80 2 km h 47 8 49 8 mph 41 6 43 3 kn Rate of sink 0 53 m s 104 ft min at 69 2 km h 43 0 mph 37 4 kn Wing loading 18 5 kg m2 3 8 lb sq ft See also editAircraft of comparable role configuration and era Hirth Hi25 KriaRelated lists List of glidersReferences editNotes edit Akaflieg Stuttgart 90 Jahre Forschen Bauen Fliegen in German 1st ed Stuttgart Akaflieg Stuttgart e V 2016 pp 187 196 Akaflieg Stuttgart fs 24 Phonix 1957 Archived from the original on 23 September 2015 Retrieved 13 June 2013 Bolkow fs 24 Phonix T0 Archived from the original on 5 March 2016 Retrieved 13 June 2013 Shenstone B S K G Wilkinson Peter Brooks 1958 The World s Sailplanes Die Segelflugzeuge der Welt Les Planeurs dans Le Monde in French and German 1st ed Zurich Organisation Scientifique et Technique Internationale du Vol a Voile OSTIV and Schweizer Aero Revue pp 51 54 fs 24 Phonix Stuttgart University Retrieved 13 June 2013 Bibliography edit fs 24 Phonix Akaflieg Stuttgart Akaflieg Stuttgart Retrieved 30 October 2019 Bolkow fs 24 Phonix T0 Archived from the original on 5 March 2016 Retrieved 13 June 2013 Akaflieg Stuttgart fs 24 Phonix 1957 Archived from the original on 23 September 2015 Retrieved 13 June 2013 Shenstone B S K G Wilkinson Peter Brooks 1958 The World s Sailplanes Die Segelflugzeuge der Welt Les Planeurs dans Le Monde in French and German 1st ed Zurich Organisation Scientifique et Technique Internationale du Vol a Voile OSTIV and Schweizer Aero Revue pp 51 54 External links edit nbsp Wikimedia Commons has media related to Akaflieg Stuttgart fs24 Akaflieg Stuttgart website Retrieved from https en wikipedia org w index php title Akaflieg Stuttgart fs24 amp oldid 1169349602, wikipedia, wiki, book, books, library,
