July 15, 1919

July 15, 1919

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Airplane and Seaplane Engineering

By Commander H. C. Richardson18 min

British Airship R-34 Described

Moisture Proofing Airplane Propellers With Aluminum Leaf

By M. E. Dunlap9 min

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Airplane and Seaplane Engineering

The work of seaplanes abroad was that of submarine patrol and convoy work, and this having been determined on, all efforts were made to obtain the most suitable seaplanes for the service. The principal work was done with two types of seaplanes namely, the HS-2—the single-motored plane developed from the HS-1—and the H-16, a copy of the English seaplane of the same type developed as a result of Commander Porte’s experience with the original America and subsequent types developed therefrom.

By Commander H. C. Richardson18 min

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British Airship R-34 Described

The British airship R-34, Maj. G. H. Scott, R. A. F., commander, completed on July 5 the first westward crossing of the Atlantic, landing at Roosevelt Field, Mineóla, L. I., N. Y., 108 hr. 12 min. after she left East Fortune air station, near Edinburgh, Scotland.
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Moisture Proofing Airplane Propellers With Aluminum Leaf

In spite of its variability and some properties undesirable in a propeller material, wood seems to be the most satisfactory material for airplane propellers. The successful use of wood, however, depends upon overcoming or, at least, reducing to a minimum the effects of these undesirable properties, of which, perhaps, the most important is the tendency to shrink and swell with changes of moisture content.

By M. E. Dunlap9 min

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Altitude Errors in Aerial Navigation

A New Form of Barograph for Their Avoidance

By J. G. Coffin8 min

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Course in Aerodynamics and Airplane Design

Section 6. Instruments for Full Flight Testing—Continued

By Alexander Klemin7 min

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Notes on Balloon Fabrics

One essential element of all lighter-than-air craft is a gas envelope. The development of satisfactory materials for the construction of this gas-tight envelope alw'ays has been and still remains one of the principal problems in the construction of balloons, and more particularly airships.

By Junius David Edwards6 min

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Electric Arc Welding in Aircraft Construction

By R. E. Kinkead3 min

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The Air Service Parachute

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The Bristol Triplane Braemar

The Bristol triplane Braemar was constructed to provide a machine capable of maintaining a high speed during a protracted flight, and of bearing a considerable load in addition to the weight of crew and fuel. In particular it was intended to be used for the bombing of Berlin and other interior German towns.
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Editorials

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