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Viewing 164461 to 164490 of 170061
Standard
1948-03-01
This specification covers the requirements for electrodeposited cadmium on metal parts.
Magazine
1948-02-01
Technical Paper
1948-01-01
ROY S. GODBEY
Technical Paper
1948-01-01
H. R. Grigsby
ABSTRACT
Technical Paper
1948-01-01
JAMES WATT
Technical Paper
1948-01-01
Howard S. Currier
ABSTRACT
Technical Paper
1948-01-01
F. R. WATSON, F. H. CAUDEL, J. D. HELDMAN
Technical Paper
1948-01-01
Merrill C. Horine
ABSTRACT
Technical Paper
1948-01-01
GEORGE W. WALKER
Technical Paper
1948-01-01
J. W. SYMONDS
Technical Paper
1948-01-01
Helene Rother
ABSTRACT
Technical Paper
1948-01-01
CLARENCE L. JOHNSON
Technical Paper
1948-01-01
W. F. JOACHIM
HERE are some of the highlights of the wartime testing and development work done on various diesel engines by the U. S. Naval Engineering Experiment Station at Annapolis, Md. The author suggests that future development work on diesels be directed toward improving efficiencies, reducing noise, and increasing specific power-without sacrifice in reliability, of course. The statements and opinions expressed are those of the author and not necessarily of the Navy Department.
Technical Paper
1948-01-01
J. G. McNab, D. T. Rogers, A. E. Michaels, C. E. Hodges
ANALYSIS of winter field storage test data on winter-grade oils containing pour depressants leads to identification of the basic features of the temperature cycles which result in severe pour reversion. The pour-stability test developed on the basis of the analysis exposes oils to a 6-day temperature cycle in a laboratory refrigerated cabinet. Two different cycles are used, one for oils of high cloud point and the other for oils of intermediate or low cloud point. Test results agree well with field observations for winter-grade motor oils, heavy-duty oils, and diluted heavy-duty oils.
Technical Paper
1948-01-01
J. G. OETZEL
TESTS with eddy-current dissipators auxiliary to the usual wheel brakes on various truck and tractor-trailer combinations show that they can safely descend at cruising speed any grade on any highway over which they could be steered at cruising speed if the highway were level. Dissipators will cut maintenance costs by stretching the life of brake linings and drums. The eddy-current type of dissipator has no wearing parts except its bearings. Possibly, trucks equipped with more powerful engines and with energy dissipators could cruise at higher speeds, increasing profits by making more trips per year with a given load.
Technical Paper
1948-01-01
WINSTON M. DUDLEY
BY relatively simple mathematics, it is possible to include the effects of mass, flexibility, valve-spring force, and gas pressure in designing valve cams for automobile or aircraft engines. First, a curve of ideal valve motion having suitable lift area and minimum acceleration properties is specified. Then, with the valve assumed to be executing this motion at a chosen speed, the sum of the inertia, gas pressure, and valve-spring forces can be computed at any point in the cycle. The driving force to overcome these resistances is created by compressing the valve linkage. The amount of deflection needed at any time can be found. These deflections are added to the valve motion to find the correct cam lift.
Technical Paper
1948-01-01
H. H. Cherry, A. B. Croshere
FOR preliminary design work on transport airplanes, a graphical method is outlined for determining the effect which changes in a set of chosen major design variables will have on the airplane's ability to meet a given set of specifications and regulations. Engines, propellers, and wing geometry are selected. Then for each condition laid down as a specification or regulation, a limiting curve of maximum weight allowed by the condition is plotted as a function of wing area. These curves are developed from basic data and standard equations. If it is possible to meet all the conditions, the limiting curves - when plotted together on one graph - will enclose an area on the “allowable” side of all curves.
Technical Paper
1948-01-01
L. R. KOEPNICK

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