April 1, 1947

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Aviation Electronics

How's and Why's of Aircraft Electronic Tubes

UNINTERRUPTED scheduled flight service depends to a great measure on electronics—with radio communication, radio landing beacons, electronic range and direction indicators, radio altimeters, electronic autopilots, and a score of other electronic devices playing roles promoting the regularity and safety of modern air transport.

By FRANK ROCKETT14 min

Regular Features

What's New in Products and Practices

Consisting of a tire constructed of rayon cords within a rubber air container, new “Life Protector” safety inner tube designed for use on commercial airlines is announced by Firestone Tire Rubber Co., Akron. Developed for use on Republic Rainbow, its size is 70 × 25 - 28.

Special Articles

The Case for Wage Incentives

A LOOK AT THE RECORD indicates that good wage incentive plans can accomplish two things— lower the employer’s production costs and raise the employee’s take-home pay. This is the reason: Higher wages can be paid if they result in a big enough increase in output, because as volume of output goes up, production costs per unit go down.

By FRANK BRINE9 min

Aviation Research—Engineering—Production

Practical Engineering of Rotary Wing Aircraft

Beginning his contribution to this comprehensive series, Engineer Campbell discusses basic conditions underlying rotor hub design.

By HARRIS S. CAMPBELL9 min

Aviation Research—Engineering—Production

Static Stability Analysis for Flying Boats and Seaplanes

In this final article of this valuable series, Researcher Stout develops detail procedure for float calculations.

By ERNEST G. STOUT8 min

Aviation Research—Engineering—Production

Air Conditioning Turbine-propelled Aircraft

Concluding an important series showing great need for close cooperation between airframe, power plant and equipment designers in creating cabins which will make possible speeds over 500 mp

By H. J. WOOD8 min

Aviation Research—Engineering—Production

Radio "Fix" Device Enables Pinpoint Avigation

ENCOUNTERING A HEAVY STORM FRONT on a flight from Hamilton Field, the Army Douglas C-47 pilot contacted the Los Angeles radio range for clearance to Clover Field at Santa Monica. “Congested traffic. Two-hour delay,” came the discouraging reply, followed by detailed holding-procedure instructions.

By FRANCIS C. BYRNES7 min

Argentina Seen Prime Export Market

MORE THAN 200 export specialists in a wide range of manufacturing companies recently picked Argentina as an “outstanding” market for American aircraft. Six months ago it looked more like an outstanding market for the British. But not today.

By RAYMOND L. HOADLEY7 min

Aviation Research—Engineering—Production

Improved Static Testing Helped Prove Dc-6

Revealing how Douglas engineers took an off-the-line sample of company's newest airliner and successfully applied new strengthgaging methods—yielding vital data with little interruption in production of the craft.

By WARREN W. BRADLEY7 min

Aviation Maintenance

Designed-in Maintenance Ease Keynoted in Douglas Ad-1

Maximum maintenance in minimum time is no chance result in new carrier plane, the Skyraider . . . Here's how program of persistent design simplification gave top servicing facilities—a vital consideration for all craft types.

By W. L. WHITTIER7 min

March 11947

May 11947

April 1, 1947

April 1, 1947