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Front and Rear Views of Santos Dumont's New Aeroplane in Which Thin Wood Sheets Form the Supporting Surfaces.

Note the peculiar propeller with spoon-shaped blades which pulls the machine along on its single wheel; also the placing of the combined horizontal and vertical rudders at the rear instead of in front, and the mounting of the motor on top of the planes.

be seen from the photograph, the long beam, which projected in front of his former aeroplane and carried the box-shaped rudder, is now placed at the rear of the planes. The motor is placed high in the middle of the structure, and carries a 66-inch propeller upon its crankshaft, while the operator sits upon a small saddle below and in front of the motor. The new aeroplane is to have a 100-horse-power, 16-cylinder, water-cooled engine, which will weigh with its accessories about 260 pounds, or 73 pounds more than the 50-horse-power motor.
     
The weight of the machine itself is some 66 pounds less than the weight of Santos Dumont's former machine, which weighed complete, with a 50-horse-power motor, about 460 pounds. The new machine, equipped with a 50-horse-power, 8-cylinder motor as shown in  the illustrations, weighs just under 400 pounds, or,  with M. Dumont on board, a little over 500. The planes are 36½ feet long by about 2 feet wide, which gives a total supporting surface of about 146 square feet. The load carried per square foot will be from 3 to 3½ pounds, which is rather high and will accordingly make necessary a speed of over 50 miles an hour before the machine will lift. The chief novelty in the construction of the new aeroplane is the use of mahogany instead of bamboo rods. The horizontal surfaces are constructed of thin wood strips in  place of the canvas used heretofore, while the vertical divisions are still made of cloth.
     
The Delagrange aeroplane, which we also illustrate, [[text cut off]] its first test on February 28 at Vincennes. This apparatus is of the cellular type, and has 60 square [[text cut off]] ters of surface. It is a double-surface machine of [[text cut off]] biplane type, the second set of planes being only [[text cut off]] ut half the length of the first. The main aeroplanes are 32.8 x 6½ feet in length and width, while [[text cut off]] rear planes are only half as long and have the [[text cut off]] e width. The main planes are 4.9 feet apart. They are connected together by vertical posts braced 

small pneumatic-tired wheel, which can be turned in any direction, while the front planes are mounted upon a framework of steel tubing supported upon two  wheels through the intermedium of shock-absorbing springs. The front and rear planes are connected together by steel tubes and are braced with wire.
     
In the middle of the forward planes, on a suitable bed, is placed the motor, a seat for the operator, the steering and control levers, and, on the end of a long beam some 9 feet forward, the horizontal rudder, which is also made up of two planes having a total surface of 7 square meters (75.34 square feet).
     
At the rear part of this bed is placed an 8-cylinder motor of 50 horse-power, which makes 1,500 R.P.M. The propeller is fastened upon the motor shaft, and has a diameter of 2.1 meters (6.89 feet) and a 1-meter (3.28 foot) pitch. The blades are of cast aluminum, and are riveted to the arms of steel tubing which screw into a steel hub. This propeller is so constructed that all its parts produce traction except the central part about the hub, which undergoes merely a bending strain. It develops a thrust of 150 kilogrammes (330 pounds) when the motor is turning up 1,400 R. P. M. and developing 40 horse-power.
     
From previous experiments of M. Voisin (the constructor) with this type of aeroplane mounted on floats and drawn by a motor boat, this gentleman has figured that the present aeroplane (which has 645.84 square feet of supporting surface) should lift at a speed of about 52 miles an hour. From the former experiments also, an aeroplane of this type was found to be  quite stable.
     
At the first trial of the new aeroplane on the drill grounds at Vincennes, the machine was put together amid a crowd of curious spectators. When everything was ready, M. Voisin took his seat, and the 50-horse-power, 8-cylinder, V motor was started. The machine shot forward some 150 feet, and then the front part started suddenly skyward as shown in the

travel in the Eastern Desert. They are found to be a less difficult means of conveyance, as well as a more economical one. Cairo, Egypt, has four times as many automobiles this year as last, and the number is rapidly increasing. As there are no hills to climb, the cheaper machines of small horse-power are most generally used. The mining department of the ministry of finance is constructing roads for police service in the Eastern Desert, and the progress has been considerable. An excellent track of ninety miles has been completed between Edfou and Beza. From Beza it will branch to the north and south.

The department of mines has had a new type of motor built for use in the desert, which has proved very satisfactory. The longest day's trip in the Eastern Desert was 148 miles, which was made last summer. During the last trip made by the mining department's tricar, 243 miles were covered in four days, during which time the ordinary work of inspecting the roads and mines was carried on. Three-wheel motor cars are more successful for desert travel than motor cycles, which cause a great strain on the rider. Ordinary pneumatic tires are used, protected by leather and iron-studded bands. Water is only necessary at 50-mile intervals.

The Port Said Motor Car Company started service recently, running to the Arab village. Each car accommodates 25 passengers, and the trip is made in less than half the time taken by the trams. the economy of motoring in the desert is shown in the detail of the work  accomplished by the two tricars and the motor cycle during their desert journeys. The six-horse-power tricar covered a total mileage of 2,280, averaging 25 miles per gallon of petroleum; average lubricant, 1.6 pint per 100 miles. the nine-horse-power tricar covered a total mileage of 1,051; averaged 25.8 miles per gallon petroleum and 2.4 pints lubricant. Motor cycle, mileage, 1,462; 63.8 miles per gallon petroleum, and the average lubricant per 100 miles, 0.35 pint.

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Side View of Delagrange Aeroplane Ready for Its Trial.

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The Broken Front Planes Turned Upward  After the Test.

This machine is of the bi-plane or following surface type, there being two sets of double surfaces, one behind the other. The motor is mounted on the lower forward plane, the propeller being on the motor crankshaft just back of the plane and the operator's seat being placed in front of the motor. The rear planes are connected by three vertical partitions, with a small vertical rudder behind the middle one. A double horizontal rudder is fitted in front.

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