Glasflügel H-301
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| Type designation | H-301 Libelle |
| Competition class | 15-metre |
| Number built | 111 |
| Crew | 1 |
| Length | 6.19 m |
| Height | 1.25 m |
| Cockpit width | 0.59 m |
| Cockpit height | 0.85 m |
| Wingspan | 15 m |
| Wing area | 9.50 m² |
| Aspect ratio | 23.6 |
| Empty mass | ca. 180 kg |
| Water ballast | 50 kg |
| Maximum mass | 300 kg |
| Wing loading | 31.5 kg/m² |
| Maximum speed | 200 km/h |
| Rough air speed | 200 km/h |
| Maneuver speed | 150 km/h |
| Minimum sink rate | ca. 0.55 m/s at 75 km/h |
| Glide ratio | ca. 39 at 95 km/h |
| Roll rate | -45º to +45º bank |
The Glasflügel H-301 Libelle is an early composite 15-metre Class single-seat sailplane produced by Glasflügel from 1964 to 1969.
[edit] History
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, waterballast 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 unusual in having a catch that enables the front to be raised by 25mm in flight to provide a blast of ventilating air if required, instead of the more conventional small sliding panel used for this purpose.
The American Will Schuemann pioneered several performance-enhancing modifications to the type. Exemplars incorporating these changes are informally known as 'Schümanised' Libelles.
The H-201 Standard Libelle was developed in 1967 as a Standard Class variant.
The Libelle was a very popular and influential design. Its very light wings and extremely easy rigging set a new benchmark. Handling is generally easy except that it is quite sensitive to sideslipping and has relatively ineffective airbrakes that make short landings tricky for inexperienced pilots.
The Standard Libelle was superseded by the Hornet.
The Libelle was superseded by the Mosquito.
[edit] General Description
- 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
[edit] Sources
- Thomas F, Fundamentals of Sailplane Design, College Park Press, 1999
- Simons M, Segelflugzeuge 1965-2000, Eqip, 2004
- Sailplane Directory
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