Page:My Airships.djvu/299

 time while waiting for the future to bring forth competitions worthy of my race craft.

So I built my "No. 9," the smallest of possible dirigibles, yet very practical indeed. As originally constructed, its balloon's capacity was but 220 cubic metres (7770 cubic feet), permitting me to take up less than 30 kilogrammes (66 lbs.) of ballast—and thus I navigated it for weeks, without inconvenience. Even when I enlarged its balloon to 261 cubic metres (9218 cubic feet) the balloon of my "No. 6," in which I won the Deutsch prize, would have made almost three of it, while that of my "Omnibus" is fully eight times its size. As I have already stated, its 3 horse-power Clement motor weighs but 12 kilogrammes (26$\tfrac{1}{2}$ lbs.). With such a motor one cannot expect great speed; nevertheless, this handy little runabout takes me over the Bois at between 20 and 25 kilometres (12 and 15 miles) per hour, and this notwithstanding its egg-shaped form (Fig. 15), which would seemingly be little calculated for cutting the air. Indeed, to make it respond promptly to the rudder, I drive it thick end first.

I have said that, as it was originally proportioned, the balloon of this smallest of possible