[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki19\/lommatzsch-libelle-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki19\/lommatzsch-libelle-wikipedia\/","headline":"Lommatzsch Libelle – Wikipedia","name":"Lommatzsch Libelle – Wikipedia","description":"From Wikipedia, the free encyclopedia German single-seat glider, 1957 Lommatzsch 58\/II Libelle Lommatzsch 58\/II Libelle-Laminar Role Advanced training and aerobatic","datePublished":"2022-10-28","dateModified":"2022-10-28","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki19\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki19\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/b\/b4\/Libelle_Laminar_DM-2668_1958_original_%288665625385%29.jpg\/300px-Libelle_Laminar_DM-2668_1958_original_%288665625385%29.jpg","url":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/thumb\/b\/b4\/Libelle_Laminar_DM-2668_1958_original_%288665625385%29.jpg\/300px-Libelle_Laminar_DM-2668_1958_original_%288665625385%29.jpg","height":"202","width":"300"},"url":"https:\/\/wiki.edu.vn\/en\/wiki19\/lommatzsch-libelle-wikipedia\/","wordCount":2167,"articleBody":"From Wikipedia, the free encyclopediaGerman single-seat glider, 1957Lommatzsch 58\/II LibelleLommatzsch 58\/II Libelle-LaminarRoleAdvanced training and aerobatic gliderType of aircraftNational originGDRManufacturerVEB Apparatebau Lommatszch (VBAL)DesignerHeinz Roessing and Prof LandmannFirst flight13 February 1957Introduction1957Retired1987Number builtabout 110The Lommatzsch Libelle or VBAL Libelle was an advanced, high performance training glider built in the GDR in the 1950s. There were several variants and over 100 were built.Table of ContentsDesign and development[edit]Operational history[edit]Variants[edit]Aircraft on display[edit]Specifications (Lom-58\/I Libelle Standard)[edit]References[edit]Design and development[edit]The Vnesheconombank was responsible for funding for aircraft development centres in the GDR, including the factory at Lommatzsch which was responsible for glider design and production and was known as VEB Apparatebau Lommatzsch or VBAL. In 1955 they began the design of a single seat, high performance, wooden glider capable of providing training in advanced soaring and basic aerobatics. The first prototype, the VBAL 55 Libelle (Dragonfly) or Lom 55 V1 for short, had a butterfly tail and was first flown 13 February 1957 by Karl Treuter. The V2 had a similar tail and was used for stress testing. Flight testing led to production variants with conventional tails. The Lom 55 and three of its five production variants had a wingspan of 16.50\u00a0m (54\u00a0ft 2\u00a0in) but the Lom 58 and 58\/I were Standard Class gliders with 15.00\u00a0m (49\u00a0ft 3\u00a0in) spans. The final variant, the Lom 58\/II, had a 16.50\u00a0m (54\u00a0ft 2\u00a0in) span laminar flow wing.[1][2]The wood and fabric Libelle had a two-piece, mid-mounted, single spar wing of trapezoidal plan out to slightly blunted tips, apart from those of the two Standard class variants which ended in salmon tip fairings. The wing was plywood-covered ahead of the spar, forming a torsion resistant D-box, and fabric-covered behind. Exceptionally, the laminar flow wing of the Lom 58\/II was dural-foil covered. The ailerons of this variant were single-piece[3] but on all others they were divided. Three variants, the Lom 57\/I, 58\/I and 58\/II, had flaps. All variants had spoilers.[2]Apart from the two V-tailed prototypes, all Libelles had very similar fuselages. These were built in two parts, wooden-framed and fabric covered forwards and a ply-skinned monocoque, circular section rear. The fin and broad rudder was largely straight-edged, though blunted at the top and rounded near the rudder base. The tailplane, mounted on top of the fuselage and at its end, was trapezoidal in plan apart from blunted tips and carried narrow, tapered elevators. Fixed tail surfaces were ply-covered and control surfaces fabric-covered.[1] The Libelle landed on a rubber-sprung, semi-recessed, fixed monowheel located ahead of the wing trailing edge, assisted by a short skid under the nose and a small tailskid.[2]Operational history[edit]The first two production Libelles were accepted in August 1958 and the final production total was about 110. Most numerous were the Standard Class variants, of which about 70 were built. Libelles were prominent in national gliding contests; 17 out of 37 contestants flew them in 1959 at the first of these, including the winner, Manfred Blauer. The laminar-wing versions, of which 22 were built, also set national speed and distance records.[2]The last Libelle in the GDR was retired in 1987.Variants[edit]Lom 55Prototypes. Two built for flight (V-1 and V-3) and another, V-2, for stress testing. V-1 had a V-tail; first flown 13 February 1957. V-3, first flown June 1957, had a conventional crucifix tail, as did all production variants.Lom 57First production type. Length 6.80\u00a0m (22\u00a0ft 4\u00a0in). First flown June 1957.Lom 57\/ILength 6.60\u00a0m (21\u00a0ft 8\u00a0in). Monowheel fairing introduced and used on later variants. Together, 13 Lom 57s and 57\/Is built.Lom 57\/IIProject only, 19\u00a0m (62\u00a0ft 4\u00a0in) span.Lom 58Standard class Libelle with 15\u00a0m (49\u00a0ft 3\u00a0in) span. Fuselage as Lom 57.Lom 58\/IStandard class, wing as Lom 58. Length 6.60\u00a0m (21\u00a0ft 8\u00a0in). First flew 27 February 1959. About 70 Lom 58s and 58\/Is built.Lom 58\/IILaminar wing. Length 6.60\u00a0m (21\u00a0ft 8\u00a0in). 22 built.Aircraft on display[edit]Though several airframes survive only 58\/II Libelle Laminar DM-2668, in the Deutsches Segelflugmuseum mit Modellflug on the Wasserkuppe, is on public display.[4]Specifications (Lom-58\/I Libelle Standard)[edit]Data from The World’s Sailplanes vol II (1963)[5]General characteristicsCrew: OneLength: 6.60\u00a0m (21\u00a0ft 8\u00a0in)Wingspan: 15.0\u00a0m (49\u00a0ft 3\u00a0in)Wing area: 13.76\u00a0m2 (148.1\u00a0sq\u00a0ft)Aspect ratio: 16.35Airfoil: root G\u00f6ttingen G\u00f6 549 mod.\u00a0; mid G\u00f6ttingen G\u00f6 549\u00a0: tip G\u00f6ttingen G\u00f6 549 mod.Empty weight: 210\u00a0kg (463\u00a0lb) equippedGross weight: 300\u00a0kg (661\u00a0lb)Dihedral: 3\u00b0PerformanceStall speed: 50\u00a0km\/h (31\u00a0mph, 27\u00a0kn)Never exceed speed: 200\u00a0km\/h (120\u00a0mph, 110\u00a0kn) placard, smooth airMax rough air speed: 130\u00a0km\/h (81\u00a0mph; 70\u00a0kn)Maximum aero tow speed: 130\u00a0km\/h (81\u00a0mph; 70\u00a0kn)Maximum winch speed: 100\u00a0km\/h (62\u00a0mph; 54\u00a0kn)g limits: 4.45g at 154\u00a0km\/h (96\u00a0mph; 83\u00a0kn)4.45g at 233\u00a0km\/h (145\u00a0mph; 126\u00a0kn)\u20142.23g at 224\u00a0km\/h (139\u00a0mph; 121\u00a0kn)\u20142.23g at 194\u00a0km\/h (121\u00a0mph; 105\u00a0kn)Maximum glide ratio: 28.5 at 78.5\u00a0km\/h (48.8\u00a0mph; 42.4\u00a0kn) (best L\/D)Rate of sink: 0.73\u00a0m\/s (144\u00a0ft\/min) at 74\u00a0km\/h (46\u00a0mph; 40\u00a0kn) (minimum)Wing loading: 21.8\u00a0kg\/m2 (4.5\u00a0lb\/sq\u00a0ft)References[edit]^ a b Taylor, John W R (1960). Jane’s All the World’s Aircraft 1960-61. London: Sampson Low, Marston & Co. Ltd. p.\u00a0173.^ a b c d Michels, J\u00fcrgen; Werner, Jochen (1994). Die Deutsche Luftfahrt:Luftfahrt Ost 1945-1990. Bonn: Bernard & Griefe Verlag. pp.\u00a0138\u20139, 143\u20135.^ Schmidt, A.F. (1969). Aerotyp Segelflugzeuge. Berlin: Transpress VEB. pp.\u00a036\u20137.^ Ogden, Bob (2009). Aviation Museums and Collections of Mainland Europe. Air Britain (Historians) Ltd. pp.\u00a0211, 637. ISBN\u00a03 7637 6109 8.^ Shenstone, B.S.; Wilkinson, K.G. (1963). The World’s Sailplanes. Vol.\u00a0II. Organisation Scientifique et Technique Internationale du Vol \u00e0 Voile (OSTIV) and Schweizer Aero-Revue. pp.\u00a096\u20137.  "},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki19\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki19\/lommatzsch-libelle-wikipedia\/#breadcrumbitem","name":"Lommatzsch Libelle – Wikipedia"}}]}]