Glasflugel H.201 Standard Libelle
Designed by Wolfgang Hűtter and Eugen Hanle, the Standard Libelle is a version of the Open Class H 301 Libelle with modifications to meet the Standard Class requirements; these consisted of removing the flaps and tail braking parachute, fitting a fixed instead of retractable monowheel and raising the height of the canopy. A new Wortmann wing section is featured and terminal velocity dive brakes are fitted. The canopy has 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. The Standard Libelle is of similar glassfibre construction to the H 301 Libelle, and likewise has provision for 110 lb of water ballast in the wing leading edge.
The H 201 Standard Class version prototype first flew in October 1967. It originally had a fixed landing gear; but with a change in the Standard Class rules, a retractable gear (H 201B) became standard. The B model features larger uppersurface dive brakes, a larger stabilizer for better low-speed handling, PVC foam filler for the wing ( instead of balsa) to increase durabillity and profile accuracy, and (as an option) a water ballast system (50 kg. /100 lb.) with highter gross weight.
Glasflugel H201 Standard Libelle
A total of 601 being built.
One flown by Per-Axel Persson of Sweden, winner of the 1948 World Championships, came second in the Standard Class at the 1968 World Championships at Leszno in Poland. In 1970 Sue Martin of Australia set a womens world Out & Return record with a flight of 656 km / 407.64.
Span: 49 ft 2.5 in
Length: 20 ft 4 in
Height: 4 ft 4 in
Wing area: 105.5 sq ft
Aspect ratio: 23.0
Empty weight: 408 lb
Max weight: 772 lb
Max speed: 155 mph (smooth air)
Min sinking speed: 1.96 ft/sec at 46.5 mph
Best glide ratio: 38:1 at 53 mph