The Glasflügel H-301 Libelle is an early composite single-seat sailplane produced by Glasflügel from 1964 to 1969. The H-301 had camber-changing wing flaps so was required to compete in the Open Class because the Standard Class excluded wing flaps. It was often known as the Open Class Libelle.
In 1964 the H-301 Libelle ("Dragonfly") received the first German and first U.S. Type Certificate issued to an all-fiberglass aircraft. It had flaps, water ballast and retractable landing gear.
There are two canopy variants: the normal canopy and a sleeker, lower-profiled 'racing' canopy with no side vent. The canopy is unique in that it has a catch that enables the front to be raised by 25 mm (1 in) in flight to provide a flow of ventilating air instead of the more conventional small sliding panel used for this purpose.
The American Wil Schuemann pioneered several performance-enhancing modifications to the type, including a re-profiled wing, converting the airfoil to a Wortmann section, various fairings, a new canopy and a reshaped fuselage nose. Aircraft incorporating these changes are informally known as 'Schümanised' Libelles.[1]
Designedit
Wings: spar and shell of balsa or foam / reinforced plastic sandwich
Ailerons: balsa or synthetic foam / reinforced plastic sandwich.
Horizontal stabilizer: reinforced plastic
Elevator: reinforced plastic
Automatic connections for airbrakes, flaps and elevator. Ailerons are connected by a "pip" pin
The Libelle was a popular and influential design. Its light wings and easy rigging set a new benchmark.
Handling is generally easy except that it is sensitive to sideslipping and has relatively ineffective airbrakes that make short landings tricky for inexperienced pilots.
The H-201 Libelle (standard class) was superseded by the Hornet.
The H-301 Libelle (open class) was superseded by the Mosquito.
^Rogers, Bennett: 1974 Sailplane Directory, Soaring Magazine, page 52. Soaring Society of America, August 1974. USPS 499-920
Wikimedia Commons has media related to H301 Libelle.
Thomas F, Fundamentals of Sailplane Design, College Park Press, 1999
Simons M, Segelflugzeuge 1965–2000, Eqip, 2004
Sailplane Directory
January 01, 1970
glasflügel, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, december, 2012,. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Glasflugel H 301 news newspapers books scholar JSTOR December 2012 Learn how and when to remove this message The Glasflugel H 301 Libelle is an early composite single seat sailplane produced by Glasflugel from 1964 to 1969 The H 301 had camber changing wing flaps so was required to compete in the Open Class because the Standard Class excluded wing flaps It was often known as the Open Class Libelle H 301 Libelle H 301 being launched by winch Role 15 metre class sailplane National origin Germany Manufacturer Glasflugel First flight 1964 Number built 111 Contents 1 Development 2 Design 3 Specifications 4 See also 5 ReferencesDevelopment editIn 1964 the H 301 Libelle Dragonfly received the first German and first U S Type Certificate issued to an all fiberglass aircraft It had flaps water ballast and retractable landing gear There are two canopy variants the normal canopy and a sleeker lower profiled racing canopy with no side vent The canopy is unique in that it has a catch that enables the front to be raised by 25 mm 1 in in flight to provide a flow of ventilating air instead of the more conventional small sliding panel used for this purpose The American Wil Schuemann pioneered several performance enhancing modifications to the type including a re profiled wing converting the airfoil to a Wortmann section various fairings a new canopy and a reshaped fuselage nose Aircraft incorporating these changes are informally known as Schumanised Libelles 1 Design editWings spar and shell of balsa or foam reinforced plastic sandwich Ailerons balsa or synthetic foam reinforced plastic sandwich Horizontal stabilizer reinforced plastic Elevator reinforced plastic Automatic connections for airbrakes flaps and elevator Ailerons are connected by a pip pin The H 201 Standard Libelle was developed in 1967 as a Standard Class variant The Libelle was a popular and influential design Its light wings and easy rigging set a new benchmark Handling is generally easy except that it is sensitive to sideslipping and has relatively ineffective airbrakes that make short landings tricky for inexperienced pilots The H 201 Libelle standard class was superseded by the Hornet The H 301 Libelle open class was superseded by the Mosquito Specifications editGeneral characteristics Crew 1 Capacity 50 kg 110 lb water ballast Length 6 19 m 20 ft 4 in Wingspan 15 00 m 49 ft 3 in Height 1 25 m 4 ft 1 in Wing area 9 5 m2 102 sq ft Aspect ratio 23 6 Empty weight 180 kg 400 lb Gross weight 300 kg 660 lb Performance Maximum speed 200 km h 124 mph 108 kn Maximum glide ratio ca 39 Rate of sink 0 55 m s 108 ft min See also editAircraft of comparable role configuration and era Bolkow Phoebus Schleicher ASW 15 Standard Cirrus Related lists List of glidersReferences edit Rogers Bennett 1974 Sailplane Directory Soaring Magazine page 52 Soaring Society of America August 1974 USPS 499 920 nbsp Wikimedia Commons has media related to H301 Libelle Thomas F Fundamentals of Sailplane Design College Park Press 1999 Simons M Segelflugzeuge 1965 2000 Eqip 2004 Sailplane Directory Retrieved from https en wikipedia org w index php title Glasflugel H 301 amp oldid 1122305051, wikipedia, wiki, book, books, library,
