Perhaps the best indication of what we may expect of the aeroplane as a commercial carrier is embodied in the present plans of the manufacturers of aircraft. Using the past history of the heavier-than-air machines’ performance and their own experience and the experience of tens of thousands of flyers under all imaginable circumstances and conditions as a basis, they are building various types of aircraft. More than a score of American and British firms have already built and are putting upon the market large numbers of sports models. These machines are single and double seaters after the type of the famous Baby Nieuports, Spads, and British Sopwith Pups. They have a wing spread of anywhere from seventeen to thirty feet. The fuselage measures between ten and twenty feet. Some are equipped with one small motor generating from twenty horse-power up to ninety horse-power. Most of these motors are upright, like the ones used on motorcycles, and range from two to four cylinders. The whole machine will not weigh more than five hundred pounds and these models are able to fly at eighty to one hundred miles an hour and make an average of twenty miles or more on a gallon of gas. The price of these will depend on the demand, but most manufacturers believe they will sell for five hundred to a thousand dollars. These machines are so small that they can be landed on any road or field. Besides, the small amount of space they occupy will make it possible to house them inexpensively, and they can be used for any kind of cross-country flying or sporting purposes. The second type of the sports model has a wing spread of twenty-six to thirty-eight feet. These wings can be folded back so that the aeroplane can be housed in a hangar ten by thirty feet with ample room for the owner to work indoors on the machine. The fuselage is proportionately larger than that on the smaller machine. This aeroplane is equipped with a four-cylinder upright motor or an air-cooled rotary motor of the Gnome style with nine or eleven cylinders, generating up to ninety horse-power. Some also have two small twenty horse-power engines geared to the one propeller so they can be throttled down, or in case one stalls the other can take the flyers to their aerodrome without being forced to land. Some models have two motors on the smaller machines. These aircraft will sell for about the price of a medium-cost automobile.