The 1909 Grandjean monoplane was designed and built by Rene Grandjean in Switzerland.
In December 1911 René Grandjean was invited at Davos to fly and here he got the idea to build a ski undercarriage. On 2 February 1912 he made the first take off and landing on skis in Switzerland. His self-built Blériot-like plane was powered by an opposed four-cylinder Oerlikon engine.
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