October 17, 1921

October 17, 1921

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Canadian Airharbors

Parachutes

By Major T. Orde Lees12 min

Duralumin, lts Characteristics and Use

By William B. Stout8 min

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Canadian Airharbors

Commercial aviation is rapidly developing on a sound basis in Canada and the legislation which regulates it is in no small measure responsible for this development. The need for suitable legislation to regulate commercial aviation in this country is well known and suitably illustrated by the “Analysis of Aircraft Accidents” recently made public by the Manufacturers’ Aircraft Association and published in the Sept. 26 issue of AVIATION AND AIRCRAFT JOURNAL.
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Parachutes

When the airplane came into being ten years ago the parachute had no place in the practical politics of aeronautics. The extensive use of observation balloons, throughout the war, brought the life-saving capabilities of the parachute to the front.

By Major T. Orde Lees12 min

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Duralumin, lts Characteristics and Use

Duralumin, or ‘Dural” as it is called, is a copper aluminum alloy one-third the weight of cold rolled steel and yet of the same approximate strength characteristics. It can be heat treated to higher physical properties, but such are its peculiarities that the effect of this heat treatment is not apparent for at least an hour after it has been done.

By William B. Stout8 min

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Soaring Flight

By soaring flight—in contrast with gliding flight—is meant motorless flight without loss of height. According to the laws of the mechanics of flight, two sources of energy are available for soaring flight. One is, air currents having an upward trend; and the other is, irregularities in the natural wind.

By Prof. L. Prandtl8 min

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“Who’s Who in American Aeronautics”

SMITH, HOWARD DOUGLAS, Student: born. Council Bluffs, Iowa, Feb. 13, 1897; son of Alex Marquardt (Step-Father) and Ella Marquardt. Educated: Marshalltown public schools; University of Kansas. Aeronautical Activities: Aerial Observer, Post Field, Fort Sill, Okla., Dec. 6, 1918 to Feb. 11, 1919; primary pilot’s school, Park Field, Tenn., Feb. 11 to March 15, 1919; pursuit school, Carlstrom Field, Fla., March 15, 1919 to May 14, 1919; flying time while in the service, 250 hr.
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Gallaudet Electric Heat - Treating Furnace

It is a well recognized fact that advances made in design often force the development of improved methods of manufacture. Perhaps nowhere else than in aeronautics is there such a prompt discarding of apparatus and ideas when the cumulative pressure of advanced design makes itself evident.
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Instruments and Commercial Aviation

The development of Aircraft in the future is clearly going to be along three lines, and it is a question if any one of the three is more important than the other. The first development will concern the airplane itself; the second, the landing fields, and service stations; and the third, the personnel which flies the planes.

By C. S. Macdonald4 min

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Balloon Propaganda Distributor

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N.A.C.A. on Airship Development

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Aero Club of Pennsylvania Bulletin

October 101921 October 241921