In Partnership With

November 15, 1919

The Supply of Meteorological Information

The Development of French Naval Aviation

Estimating Performance of An Airplane

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The Supply of Meteorological Information

The difficulties and risks of aviation are so greatly increased by unfavorable atmospheric conditions that the aviator is naturally strongly impressed by the importance to him of the best and fullest meteorological information that he can obtain; and he may be led to assume that the information that he requires must necessarily suffice for all other activities and all lines of investigations.

340341

The Development of French Naval Aviation

On August 2, 1914, the naval aircraft possessed by France consisted of exactly three Nieuport hydromonoplanes without spares. Such was the development during the war that at the signing of the armistice the French Navy had forty-four air stations and approximately one thousand machines.

348349

Estimating Performance of An Airplane

Given Engine, Flight Duration and Military or Commercial Load

354355

Computations of Airplane Climb

The following assumptions will be made in calculating the climbing rate with a fixed blade propeller: 1. Engine output = 170 hp. 2. Propeller diameter = 8 ft. and A = 50.3 sq. ft. 3. Radiator area = 3.3 sq. ft. Effective area = 50.3 — 3.3 = 47. 4. Velocity of airplane = 120 m.p.h. = 176 f.p.s.

352353

Inadequacy of Visual Inspection in Kiln-Drying

Brashness, internal stresses, and hidden checks produced by poor drying may be passed undiscovered in the most rigid inspection, since they cannot always be determined by direct examination of the material. The drying process itself is, therefore, of prime importance, not only for the saving of material through the avoidance of due waste from injuries, in drying but even more so for the assurance that the material which passes inspection shall be free from subtle defect or possible weakness.

350351

Note on the Efficiency of Tandem Propellers

354355

M. I. T. Endowment Campaign

354355

Study of Aerology in the Air Services

338339

Fuels for High Compression Ratios

338339

Editorials

November 11919 December 11919