November 1, 1918

November 1, 1918

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Stresses in Airplane Ribs*

By Irving H. Cowdrey18 min

The 300 Horsepower Maybach Engine

Development of Naval Aeronautics

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424425

Stresses in Airplane Ribs*

Transverse Testing Under Non-Uniformly Distributed Load with Special Application to Airplane Wing Ribs

By Irving H. Cowdrey18 min

428429

The 300 Horsepower Maybach Engine

Cams and Camshaft—Both the inlet and exhaust cams are of the same profile, although the valve lift is slightly greater for the exhaust valves, a difference which is due to the unequal tappet clearances. Details of the cam design are given in Fig. 11.
434435

Development of Naval Aeronautics

Congressman Padgett, chairman of the Committee on Naval Affans, delivered in the House on Oct. 14 a comprehensive address on the accomplishments of the United States Navy, in connection with which he submitted reports prepared by the chiefs of the several bureaus.
436437

News of the Fortnight

General Kenly on the DH-4 The War Department authorizes the following statement by Major-General Wm. L. Kenly: “A captain of the Air Service, recently arrived from France, has reported to me that the first de Haviland 4 planes with Liberty engines arrived from the U. S. A. at stations in France as early as May 13, 1918, and since that date have been coming in ever-increasing quantities.
422423

The French A.R. Type I Biplane

This machine belongs to the general service class of airplanes and was produced by the French Army Aircraft establishment, at Chalais-Meudon, to the designs of its director, Colonel Dorand. It is designated as A. R., or A. L. D., according to whether it is fitted with a Renault or a Lorraine-Dietrich engine.
436437

Digest of the Foreign Aeronautical Press

Aeronautics, Sept. 18, 1918 The Common Round—The following incidents, drawn from the battle zone records of the Royal Air Force, are but specimens which illustrate the nature of the day's work of airmen in France: A two-seater machine was engaged in special work when it was attacked by seven German machines, which surrounded it, firing at the British machine from all sides.
420421

The Krell Manometer

A good practical manometer for use in air laboratories is that modification of the ordinary U-type known as the Krell. In this, one branch of the U is a glass tube set at a small angle and the other branch is a large tank. The movement of the meniscus in the tube gives a reading which, from the known dimensions of the instrument, can be turned into m.p.h. When calibrated to a standard, this type makes a good manometer for constant use in an air laboratory.

By A. A. Merrill5 min

432433

Book Reviews

GUYNEMER, THE ACE OF ACES. By Jacques Mortane. Translated by Clifton H. Levy. (Moffat, Yard & Co., New York. Price, $1.50. 267 pp., 28 ill.) This volume, which appears under the pen of one of the best French aeronautical writers—who was by the way a close friend of the late Ace̶will serve as a valuable contribution to the military record of the Allies’ great aerial leaders.
422423

Cost of the Air Mail Service in August

The monthly report on the operation and maintenance of the Air Mail Service for the month of August, which is printed herewith, is of particular interest in view of the fact that it furnishes the first performance and cost data of the Standard-Hispano mailplanes (numbered 1-6).
October 151918 November 151918