In Partnership With

October 1, 1916

War Department Asks Addresses of Civilian Aviators

Course in Aerodynamics and Aeroplane Design

Stresses in Propellers Due to Gyroscopic Action

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War Department Asks Addresses of Civilian Aviators

AVIATION AND AERONAUTICAL ENGINEERING has received the following list of 817 civilian aviators from the office of the Chief Signal Officer, Washington, D. C. Lieut.-Col. George O. Squier, in requesting us to publish this list, writes: “There is inclosed, herewith, a list of names of persons who it is understood have flown heavier-than-air machines in the United States.
152153

Course in Aerodynamics and Aeroplane Design

Comparison of Standard Wing Sections

150151

Stresses in Propellers Due to Gyroscopic Action

Following on Elmer A. Sperry’s very suggestive note, considerable discussion has arisen with regard to the stresses in propellers induced by gyroscopic action. It is thought that in existing propellers, when not run at too great a speed and when designed on a conservative basis, there is a sufficient margin of strength to cover such stresses.

148149

Wisconsin Aviation Engines

The new six cylinder Wisconsin aviation engines, of which dimensioned drawings and other details are now at hand, are of the vertical type with cylinders in pairs and valves in the head. The cylinders are made of aluminum alloy castings, are bored and machined and then fitted with hardened steel sleeves about 1/16 inch in thickness.
152153

Efficient Instrument Illumination for Military Night Fliers

An aero scout on night duty, or, as called in England, a "night pilot,” has to be able to read his instruments every moment or his safety is jeopardized. But if he is a military night pilot on duty he must also keep out of the enemy’s sight. Present methods are not satisfactory in this respect and no one realizes it better than the aviator who has seen military air duty at night.

146147

Aeroplane Control Surfaces

With the recent great increase in size of aeroplanes, it has become increasingly difficult to provide control surfaces (ailerons, elevators, rudders) of adequate strength and stiffness without the use of elaborate exterior bracing, adding to head resistance and the number of parts whose failure may be disastrous.

156157

Plans for Training Aerial Reserve Corps and National Guard Fliers

144145

Editorials

Zeppelin Activities

164165

News of the Fortnight

IT IS REPORTED THAT—

ADJUTANT GENERAL FRANK L. BRIDGES of Indiana is the first State official to try to take advantage of the provisions of the National Defense Act of June 3 to form an aviation corps for the National Guard of his State. He has written to the Indiana troops at Llano Grande, Tex., for applicants who desire to take the six months’ course in aviation at the San Diego, Cal., Army School, which the War Department will give to eligible officers from every State.
150151

Inherent Controllability of Aeroplanes

Two very interesting though extremely mathematical papers, by Professor G. H. Bryan and Leonard Bairstow in the Aeronautical Journal, deal with the inherent controllability of aeroplanes. Professor Bryan is one of the great pioneers of the mathematical theories of dynamic stability, and Mr. Bairstow has been one of his chief interpreters.
September 151916 October 151916