Форум Breguet's Aircraft Challenge

The Grandjean L-1 was built by Rene Grandjean and M.Meuron of Lausanne in 1912 and purchased by the Swiss military in august 1914. First powered by a 50 hp Oerlikon it was re-engined with a 70 hp Gnome after a crankshaft failure. It was used as a trainer until june 1915 with the serial # 25.

Журнал Flight

Flight, March 2, 1912.

FOREIGN AVIATION NEWS.

Grandjean Wins a Prize.

ON the morning of the 21st February, M. Rene Grandjean won a prize of 1,000 francs offered by Davos for a flight above the town visible from the Shatzalp and circling round the church of Johannaux-Platz. First making a circle above the Lake at a height of 300 metres Grandjean rose about 130 metres higher and made the necessary circuit quite easily.