November 15, 1918

November 15, 1918

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Dopes, Doping and Ventilation

By Frank A. Leedy

Some New Enemy Airplanes

The Economics of Aerial Transport

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484485

Dopes, Doping and Ventilation

Dope is a soluble cellulose, either a nitrate or an acetate, which is also known as pyroxelyne varnish, collodion, lacquer, etc. The solvents are of the various alcohols, ketones, benzol and gasoline, and are usually held in suspension or mixture by certain proportions which are easily separated and thrown out; therefore it is unwise for dopers to interfere by adding to, or changing, mixtures.

By Frank A. Leedy

486487

Some New Enemy Airplanes

The Rumpler C.5 biplane is a general service machine and was used by the enemy at the beginning of the year. It differs only in detail from the earlier C.4 type, an illustrated description of which appeared in the March 15, 1918, issue of AVIATION AND AERONAUTICAL ENGINEERING.
488489

The Economics of Aerial Transport

When the subject of the regular civilian use of airplanes for public service or for the carriage of mails or light goods comes up for discussion, there are plenty of people who think that the whole matter can be settled by merely stating that the airplane has too limited a carrying capacity, and costs too much to operate.
490491

The Examination of Aviators*

The examination of aviators presents many new points which differ from the usual physical examinations given to officers and enlisted men. Flying is a new science and new faculties are brought into play, the soundness of which must be determined in the applicant.

By R. A. Bachmann

494495

The 300 hp. Maybach Engine*

Ignition—The two Bosch Z.H.6 type magnetos are mounted on brackets east on the rear end of the base chamber, and are driven at 1.5:1 engine speed directly off the rear end of the camshafts. The ignition point is set 38 deg. early. Two Bosch 3-point plugs are somewhat inaccessibly fitted in the head of each cylinder between the twin water connections as previously described.
496497

Aeronautical Patents

1,278,170—To John Koltko, Watertown, Conn. Smoke diffusing apparatus. 1,278,133—To John R. Gammeter, Akron, O., assignor to the R. F. Goodrich Co., New York City. Valve. 1,278,123—To John E. Dwyer, Springfield, Ohio Return airship.
496497

Light Alloys in Aircraft Construction

Aircraft of the present day are unique among similar productions of the engineering industry in perhaps more directions than one, but it is with regard to the materials employed that their insularity is most noticeable. The building of airplanes is essentially the business of an engineer, and timber, which is largely employed in airplane construction, is not usually associated with the work of an engineer, excepting for special fitments of more or less decorative nature, and for accessories which are added for comfort’s sake, or to give a finish to the product.

By F. W. Halliwell

498499

National Physical Laboratory Report, 1917-18

The following references to aeronautical work at the National Physical Laboratory of Great Britain occur in the report for the year 1917-18: Research Work—During the past year the laboratory has been asked by the Ministry of Munitions to undertake the manufacture of a certain class of gauges and to extend largely the provision for the testing of glass vessels for chemical work.
498499

English Universities to Teach Aeronautics

Several large sums of money have been given recently to leading English universities for the establishment of professorships in aeronautics. The University of London makes the announcement that it not only has accepted a gift, but proposed to start systematic work in the science of aeronautics as soon as a suitable appointment can be made to the chair.
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Digest of the Foreign Aeronautical Press

NOVEMBER 11918 December 11918