Few people outside of army circles, and only a small number within, appreciate the immensity and importance of the undertaking signified by what is officially designated as “ The Spruce Production Division of the Signal Corps of the United States Army.”
Among the enemy airplanes which have more recently been captured on the Western front by the Royal Flying Corps and are now on exhibition in London, a two-seater fighter, the Model C.V Albatros biplane, elicits considerable attention. This machine, which is here described and illustrated after Flight, proves of particular interest as a specimen of modern German airplane construction, because it tends to show that some, and not the least well known, enemy airplane designers are displaying a growing sympathy toward the use of veneer in body construction.
1,256,670. To William H. Fearn, Camden, N. J. Direct lifting by droaeroplane. 1,256,812. To Joseph Mader, Minneapolis, Minn., assignor of onethird to Merritt Brandon, Minneapolis, Minn. Airplane. 1,256,823. To Cornelius H. O'Rourke, Handford, Cal. Airplane.
Die-Castings may be defined as metal castings made by forcing molten metal under pressure into a metallic or permanent mould. It can be seen from this definition that there are three vital factors essential to the success of a die-casting process, viz:—
Difficulty is sometimes experienced, in working out the curves of performance for airplanes, in arriving at a sufficiently correct estimate of the power available at various flight speeds. This is mainly due to the difficulty in predieting a priori what changes in propulsive efficiency are to be expected over a fairly large range of flight speeds.
An American Pioneer of Soaring Flight: John J. Montgomery
Among the pioneers of aeronautics who eontrihuted their share to the realization of power flight there is one name which has nearly fallen into oblivion, that of Professor John J. Montgomery of Santa Clara College, Cal., whese investigations into the science of soaring flight and inherent stability deserve that his name be placed in the Annals el Aviation alongside with Lilienthal, Pilcher, Chanute and Ferber.
GENERAL. — 1. The general specifications, 1G1. shall form, according to their applicability, a part of these specifications. Material.—2. The specific gravity of the aluminum alloy of this specification shall not be greater than 2.85.
Commercial Aviation Possibilities in China—By Alleu J. Daniels.—China to a great number of people conveys the idea of a large cultivated country, peopled by millions of halfsavages. As a matter of fact, the country in reality is as different as possibly can be from such a state. The land is cultivated on every inch of fertile soil, the people are solid, industrious and far ahead of a great number of so-called civilized countries.
American production of combat planes has been slow in gaming momentum, but during July we will be able to keep pace with the Army’s actual participation in the fighting. In the meantime machines will go forward in gradually increasing numbers.