With the exception of the Deutsch-Archdeacon Award, which prohibited the competing aircraft from using a balloon for launch, the other awards left the question of takeoff open. The flight could take place on flat or uneven terrain, in calm weather or wind – the French Aeroclub's Award required the flight to be into the wind – and the use of an engine was not mandatory. This allowed human-powered gliders and ornithopters to compete. It was required for all prizes that the race took place in France and under the supervision of an aeronautical commission convened no later than the evening of the previous day.Les concours d'aviation. L'Aérophile. Paris: Aéroclub de France, 12o ano, no 10, out. 1904, pp. 224–225.
With the exception of the Deutsch-Archdeacon Award, which prohibited the competing aircraft from using a balloon for launch, the other awards left the question of takeoff open. The flight could take place on flat or uneven terrain, in calm weather or wind – the French Aeroclub's Award required the flight to be into the wind – and the use of an engine was not mandatory. This allowed human-powered gliders and ornithopters to compete. It was required for all prizes that the race took place in France and under the supervision of an aeronautical commissi,on convened no later than the evening of the previous day.Les concours d'aviation. L'Aérophile. Paris: Aéroclub de France, 12o ano no 10, out. 1904, pp. 224–225.