|Exhibit||Hans Grade monoplane|
|After Hans Grade had realized that his triplane was rather clumsy and difficult to control, his experiences let to the design of a lighter monoplane "Libelle" (dragonfly) with curved wings. With the "Libelle" he won the Lanz-Preis der Lüfte (Lanz Aviation Prize) on the 30th of October, 1909. Participants had to comply with a number of special requirements. The aircraft had to be built and flown by a German. Furthermore, all components had to be made in Germany.
From 1909 to 1914, Grade built 80 "Libelle" monoplanes in his new factory in Borkheide, Brandenburg.
The aircraft cost 12.000 Mark including flight training.
First flight: August 17, 1909
Wingspan: 32.80 ft (10.20 m)
Take off weight: 441 lbs (200 kg)
Cruising speed: 37 mph (60 km/h) Engine: four-cylinder two-stroke air-cooled engine with 16.3 hp and 88 lbs (40 kg) Hans Grade body weight
In 2009, the modeller and restorer Gerd Reinicke (in this picture you can see him at the control stick) restored the "Libelle" triplane by using original components.
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