October 13, 1928

October 13, 1928

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Aviation Country Clubs

Development of Aircraft Propellers

By LIEUT. COMDR. C. H. HAVILL12 min

The Control of the Materials

By EDWIN R. DOUGLAS10 min

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Aviation Country Clubs

A Plan to Create a Nationwide Chain of Flying Clubs is Inaugurated With the Organization of a Long Island Unit
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Development of Aircraft Propellers

BEFORE the first successful flight of the Wright brothers in 1903, various mathematicians speculated on the proposition that an air propeller was analogous to marine propellers. There were two schools of thought at that time, one of which claimed that if proper corrections were made for the difference of density between air and water that marine practice in propeller design would apply equally well to air propellers; the other school of thought maintained that air being compressible, and having less density, and being subject to thermodynamic changes made it necessary that an entirely new theory of propeller design be produced.

By LIEUT. COMDR. C. H. HAVILL12 min

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The Control of the Materials

IN several earlier articles, we have considered methods for controlling production by planning the labor. Obviously, there will be no use in advance planning of labor unless it is sure that the material will be at hand when wanted for that labor to work on.

By EDWIN R. DOUGLAS10 min

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The Cleveland Airport

Continued Expansion and Improvement Since the Opening in 1925 Has Made the Field a Splendid Airport Model

By WALTER E. BURTON8 min

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Merchandising Airplanes

Discussion of the Methods of Distributing and Selling Aircraft and the Necessity for a Highly Organized System

By H. LEE7 min

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The Slate Dirigible

An Experimental All-Metal Airship With the "Egg-Shell" Type Hull Driven by a Steam Operated Blower in the Nose
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The "Kitty Hawk"

A Three Passenger Open Biplane Powered With a Ryan Siemens Engine Cruises at 90 M.P.H. and Lands at 40 M. P. H.
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NEWS SECTION

New England Aero Show at Boston Attracts 70,000

Manufacturers Find Many Sales Leads At Mechanics Building Exhibit
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NEWS SECTION

A. C. of A. Firm Fully Organized

Board of Directors Is Flected For Company Replacing Pan American
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NEWS SECTION

World Conference Invitations Listed

Executive and Other Committees Named for Washington Meeting
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