In Partnership With

June 15, 1919

Nomenclature for Aeronautics

Airplane Engine Crankshaft Design

BUILDER OF BIG AIRCRAFT WAS FIRST TO ADVOCATE THEM

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Nomenclature for Aeronautics

The National Advisory Committee for Aeronautics has just issued a preprint of Report No. 25 of its fourth annual report which contains the Nomenclature for Aeronautics adopted by the committee at its annual meeting, Oct. 10, 1918. Report No. 25, which supersedes Report No. 15 of the third annual report (1917), differs from the latter by the substitution of the terms airship for dirigible, and fuselage for airplane body, and the definition of the following newly added terms: attitude, angle of banks, ceiling, crosswind force, droop, hull of an airship, lift of an airship, loop, marouflage, overhang, pancake, pitch of a propeller, angle of pitch, plane, pressure nozzle, rate of climb, right-hand engine, righting moment, roll, rudder bar, speed (air and ground), spin, tandem (planes), Venturi tube, wash in, zero lift line.
524525

Airplane Engine Crankshaft Design

It has been truthfully stated many times that every engine design is a compromise and does not necessarily represent an aggregation of the best components. However, to obtain the best engine design, careful consideration must be given to each detail and the combination of the various elements should be correctly made and involve the least amount of sacrifice.

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BUILDER OF BIG AIRCRAFT WAS FIRST TO ADVOCATE THEM

ALFRED W. LAWSON, PRESIDENT OF THE LAWSON AIR LINE COMPANY, PLANNED BIG SHIPS MANY YEARS AGO

520521

General Summary of the de Bothezat Blade-Screw Theory

The blade-screw theory presented here gives explicit expressions for the slip and race velocities in the slip stream solely in function of the dimensions of the screw blades, the coefficient of fluid resistance of the different blade sections and the working conditions.

538539

Tests of Moisture and Water Resistant Coatings

It is obviously necessary to render fairly waterproof the pontoon, float, or hull surfaces of seaplanes, flying boats, or other craft constructed of wood. If this is not accomplished, considerable water will be admitted, which will add greatly to the weight and materially diminish the speed obtainable and the general efficiency of the craft.

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Lighter-than-Air Craft

An airship derives her lift from the difference between the weight of the structure and all parts of the airship and the upward force on the airship, which is equal to the air which she displaces. The majority of this displacement is that due to the part of the ship which is filled with gas.

518519

Editorials

Editorials

524525

Fiat 12-cyl. 400 hp. Engine

The latest type of aviation engine to be produced by the Fiat Co. is a particularly interesting 12-cyl. model developing 400 hp. In this new engine the designers have succeeded in obtaining great accessibility, reduced overall area, low weight per horsepower, and in producing a remarkably “ clean ” engine.
518519

Editorials

The Tandem Airplane

540541

NC-4 Reaches Plymouth

June 11919 July 11919