The Scheibe SF-27 Zugvogel V (English: Migratory Bird) is a single-seat Standard Classsailplane, designed and built in Germany in the 1960s. A motorised version was also produced. Significant numbers remain active.
The SF-27 is a shoulder-wing, single-seat Standard Classsailplane, succeeding the Scheibe Zugvogel IIIB in production. It was designed to 1960s Standard Class competition rules requiring a span of no more than 15 m and a fixed undercarriage. Built of wood and steel, its structure was conservative; at a time when many manufacturers were using glassfibre structurally in wings and fuselages, the SF-27 only used it to cover the forward fuselage.[1]
The wing of the SF-27 is built around a single beechwoodboxspar, with plywood ribs and a leading edge torsion box. The wing covering is largely ply, entirely so over the outer section. The inner section is covered with ply from the leading-edge to behind the spar, the rest with a mixture of ply and fabric. Ailerons and Schempp-Hirth airbrakes are likewise ply covered. The cantilever horizontal tail is an all-moving ply and fabric-covered surface, set at the top of the fuselage; the fin is covered with ply and the rudder with fabric.[1]
The fuselage is a welded steel structure covered, from nose to wing trailing edge, with a glassfibre shell. The wing root fairing is also glassfibre. Further aft the fuselage is fabric covered over wooden stringers. The cockpit, within the glassfibre shell, has a single piece Plexiglascanopy, the pilot sitting in a semi-reclined position. The SF-27 has a fixed monowheel undercarriage, fitted with brakes, plus a small tailwheel.[1]
The SF-27 first flew on 12 May 1964. 30 had been built by February 1966,[1] the final total being about 120. Scheibe also produced a motorised version, the SF-27M, with a 26 hp (19 kW) 4-cylinder Hirth F-102 A2 two stroke engine on a retractable mast above the wing behind the cockpit. Its gross weight is increased to 386 kg (850 lb) and it is 115 millimetres (4.5 in) longer, with a best glide ratio 32:1.[2]
Operational historyEdit
Around 58 of the original 120 Sf-27s are still active in 2010, including several SF-27Ms.[3]
VariantsEdit
SF-27A
Standard class sailplane.
SF-27B
One-off 17 m span version.
SF-27M
Motorised version.
SLCA-10 Topaze
Licence built variant built in France by Société Lorraine de Constructions Aéronautiques (SLCA)[4]
Specifications (SF-27A)Edit
Data from Jane's All the World's Aircraft 1966/7[1]
General characteristics
Crew: 1
Length: 7.05 m (23 ft 2 in)
Wingspan: 15.0 m (49 ft 3 in)
Wing area: 12.99 m2 (139.8 sq ft)
Aspect ratio: 18.6
Airfoil: Wortmann FX 61-184 at root, FX 60-126 at tip
Empty weight: 215 kg (474 lb) equipped
Max takeoff weight: 330 kg (728 lb)
Performance
Stall speed: 55 km/h (34 mph, 30 kn)
Maximum glide ratio: 34:1 at 88 km/h (55 mph)
Rate of sink: 0.64 m/s (126 ft/min) best, at 74 km/h (46 mph)
ReferencesEdit
Wikimedia Commons has media related to Scheibe SF 27.
Notes
^ abcdeTaylor, John W R (1966). Jane's All the World's Aircraft 1966-67. London: Sampson Low, Marston & Co. Ltd. p. 392.
Taylor, John W.R., ed. (1973). Jane's All the World's Aircraft 1973-74. London, United Kingdom: Jane's Yearbooks. ISBN0-354-00117-5.
September 01, 2023
scheibe, zugvogel, english, migratory, bird, single, seat, standard, class, sailplane, designed, built, germany, 1960s, motorised, version, also, produced, significant, numbers, remain, active, zugvogel, vrole, single, seat, standard, class, sailplanenational,. The Scheibe SF 27 Zugvogel V English Migratory Bird is a single seat Standard Class sailplane designed and built in Germany in the 1960s A motorised version was also produced Significant numbers remain active SF 27 Zugvogel VRole Single seat Standard Class SailplaneNational origin GermanyManufacturer Scheibe Flugzeugbau gmbh DachauFirst flight 12 May 1964Number built about 120Developed from Scheibe Zugvogel Contents 1 Design and development 2 Operational history 3 Variants 4 Specifications SF 27A 5 ReferencesDesign and development EditThe SF 27 is a shoulder wing single seat Standard Class sailplane succeeding the Scheibe Zugvogel IIIB in production It was designed to 1960s Standard Class competition rules requiring a span of no more than 15 m and a fixed undercarriage Built of wood and steel its structure was conservative at a time when many manufacturers were using glassfibre structurally in wings and fuselages the SF 27 only used it to cover the forward fuselage 1 The wing of the SF 27 is built around a single beechwood boxspar with plywood ribs and a leading edge torsion box The wing covering is largely ply entirely so over the outer section The inner section is covered with ply from the leading edge to behind the spar the rest with a mixture of ply and fabric Ailerons and Schempp Hirth airbrakes are likewise ply covered The cantilever horizontal tail is an all moving ply and fabric covered surface set at the top of the fuselage the fin is covered with ply and the rudder with fabric 1 The fuselage is a welded steel structure covered from nose to wing trailing edge with a glassfibre shell The wing root fairing is also glassfibre Further aft the fuselage is fabric covered over wooden stringers The cockpit within the glassfibre shell has a single piece Plexiglas canopy the pilot sitting in a semi reclined position The SF 27 has a fixed monowheel undercarriage fitted with brakes plus a small tailwheel 1 The SF 27 first flew on 12 May 1964 30 had been built by February 1966 1 the final total being about 120 Scheibe also produced a motorised version the SF 27M with a 26 hp 19 kW 4 cylinder Hirth F 102 A2 two stroke engine on a retractable mast above the wing behind the cockpit Its gross weight is increased to 386 kg 850 lb and it is 115 millimetres 4 5 in longer with a best glide ratio 32 1 2 Operational history EditAround 58 of the original 120 Sf 27s are still active in 2010 including several SF 27Ms 3 Variants EditSF 27A Standard class sailplane SF 27B One off 17 m span version SF 27M Motorised version SLCA 10 Topaze Licence built variant built in France by Societe Lorraine de Constructions Aeronautiques SLCA 4 Specifications SF 27A EditData from Jane s All the World s Aircraft 1966 7 1 General characteristicsCrew 1 Length 7 05 m 23 ft 2 in Wingspan 15 0 m 49 ft 3 in Wing area 12 99 m2 139 8 sq ft Aspect ratio 18 6 Airfoil Wortmann FX 61 184 at root FX 60 126 at tip Empty weight 215 kg 474 lb equipped Max takeoff weight 330 kg 728 lb Performance Stall speed 55 km h 34 mph 30 kn Maximum glide ratio 34 1 at 88 km h 55 mph Rate of sink 0 64 m s 126 ft min best at 74 km h 46 mph References Edit nbsp Wikimedia Commons has media related to Scheibe SF 27 Notes a b c d e Taylor John W R 1966 Jane s All the World s Aircraft 1966 67 London Sampson Low Marston amp Co Ltd p 392 Private Aviation Flight Magazine 495 1972 04 03 List of SF 27s Retrieved 2011 01 13 Taylor 1973 p 543 BibliographyTaylor John W R ed 1973 Jane s All the World s Aircraft 1973 74 London United Kingdom Jane s Yearbooks ISBN 0 354 00117 5 Retrieved from https en wikipedia org w index php title Scheibe SF 27 amp oldid 1150457119, wikipedia, wiki, book, books, library,
