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 basket-less balloons (called "Hoppers" or "Cloudhoppers") have as little as of envelope volume; for a perfect sphere the radius would be around . At the other end of the scale, balloons used by commercial sightseeing operations may be able to carry well over two dozen people, with envelope volumes of up to . The most-used size is about , and can carry 3 to 5 people. The top of the balloon usually has a vent of some sort, enabling the pilot to release hot air to slow an ascent, start a descent, or increase the rate of descent, usually for