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There were two wide, winglike planes, on a light latticework of wood covered with silk, trussed and wired like a kite frame, the upper plane about five feet above the lower, which was level with the boat deck. We could see the eight-cylindered engine which drove a two-bladed wooden propeller, and over the stern were the air rudder and the horizontal planes.
The De Dion firm, also, made Vee-type engines in 1914, being represented by an 80 horse-power eight-cylindered engine, air-cooled, and a 150 horse-power, also of eight cylinders, water-cooled, running at a normal rate of 1,600 revolutions per minute.
The accompanying diagram illustrates a later Wolseley model, end elevation, the eight-cylindered 120 horse-power Vee type aero engine of the early war period.
So much for the early designs. With regard to engines of this type specially constructed for use with aircraft, three designs call for special mention. Messrs A. Gobe and H. Diard, Parisian engineers, produced an eight-cylindered two-stroke cycle engine of rotary design, the cylinders being co-axial.
In 1910 they were making three sizes of eight-cylindered Vee-type engines, and by 1915 they had increased to the manufacture of five sizes, ranging from 25 to 100 brake horse-power, the largest of the five sizes having twelve cylinders but still retaining the air-cooled principle.
As Frank gazed about in the crisp morning air a dozen other aviators opened up their sheds and the day-life of the aviation camp began. After breakfast had been despatched the boys at once went to work on their engine, a hundred horse-powered, eight-cylindered machine which was capable of driving their twin-screwed craft through the air at a rate of sixty miles an hour.
In an eight-cylindered Vee type engine, the angle between the cylinders is 90 degrees; if it is a twelve-cylindered engine, the angle drops to 60 degrees.
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