In Partnership With

April 1, 1933

The Equipment of Air Forces

Quiet Within the Airplane

Maintenance on the Royal Dutch Air Lines

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The Equipment of Air Forces

FRANCE (PART ONE): PURSUIT AND OBSERVATION

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Quiet Within the Airplane

THERE are still a great number of people in the aeronautical industry who think that relatively quiet airplane cabins are either a dream or, if they become a reality, will be the result of the application of some single magical, yet-tobe-discovered, sound-absorbing material.

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Maintenance on the Royal Dutch Air Lines

Centralized servicing for an intercontinental service

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FLYING EQUIPMENT

Boeing’s New Model 247 Transport

BETWEEN the summer of 1914 and the late fall of 1918, the pendulum of progress in airplane design swung back and forth between the engineering offices of the warring powers. Improvements in detail or in performance were pyramided; scarcely had a superior fighting ship appeared over the front when some speedier and more potent model would take-off from the other side of the fence.
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What Our Readers Say

Retractable landing gears

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The Dragon in Flight

A Picture of Civil and Military Aviation in China

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FLYING EQUIPMENT

A German High-Speed Transport

COMPARISONS are always interesting and may be extremely valuable. Elsewhere in this issue Mr. Warner has discussed European operating and maintenance practices in contrast with those on U. S. airlines, and thanks to an interesting document compiled by Mr. Kurt K. Lammertz of Ernst Heinkel Flugzeugwerke of Warnemuende, Germany, we are able to make some interesting comparisons between one of the latest foreign developments in high-speed transport practice, and our own.

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Side Slips

Airplane design made simple

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FLYING EQUIPMENT

Pratt & Whitney Twin-Row Wasp

ACTIVE development of twin - row radial engines by Pratt & Whitney Aircraft Company dates from the early part of 1929, when an intensive study was made of various cylinder arrangements with an eye toward increasing the horsepower of power-plant units over and above that afforded by singlerow radial engines.

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FLYING EQUIPMENT

Airplane Development's V-l Transport

GERARD VULTEE, lor several years chief engineer of the old Lockheed Aircraft Company is responsible for the design of one of the latest American entrants into the high-speed transport class, a nine-place singleengined ship built by the Airplane Development Company of Glendale, Cal., recently organized subsidiary of the Cord Corporation.
March 11933 May 11933