Louis Blériot of 1909. Like some of the other prizes offered by the paper, it was widely seen as nothing more than a way to gain cheap publicity: the Paris newspaper "Le Matin" commenting that there was no chance of the prize being won. The English Channel had been crossed by an unmanned hydrogen balloon in 1784 and a manned crossing by Jean-Pierre Blanchard and John Jeffries followed in 1785. Blériot, who intended to fly across the Channel in his Type XI monoplane, had three rivals for the prize, the most serious being Hubert Latham, a French national of English extraction flying
Hot air balloon sea level, and humidity of the air surrounding. On a warm day, a balloon cannot lift as much as on a cool day, because the temperature required for launch will exceed the maximum sustainable for nylon envelope fabric. Also, in the lower atmosphere, the lift provided by a hot air balloon decreases about 3% for each 1,000 meters (1% per 1,000 ft) of altitude gained. Standard hot air balloons are known as Montgolfier balloons and rely solely on the buoyancy of hot air provided by the burner and contained by the envelope. This style of balloon was developed by the