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Velocity variation over time for NACO rounds by Susan T. Peters. is a nonfiction available to read on EtoBox.

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Indian Head Division. Naval Surface Warfare Center. Indian Head. 1996. – 11 p. Firing records covering the master powder shots associated with over 15 years worth of 5-in powder proof firings are examined for velocity degradation over time. None is found, though an increase in velocity is seen. An explanation for this behavior is offered. The approach used was to examine the records from powder proof firings over as long a period as the same master powder was in use. Data for master powder shots for each lot fired were compiled and compared to ascertain whether any loss in velocity was noted. Only 5-in propellant (Naco) was studied since there have been only 17 lots of M6+2 made and proofed for the 76-mm system and this seemed too small a sample to develop reliable trends. The velocities for all the shots for a given barrel (Remember that four barrels are used for proofing 5-in powder.) were plotted against the age of the powder as measured from the powder's proofing, then a line was fit to the data as shown in Figures 1 through 4. In all four cases, the velocity rose over time, though the degree varied by barrel. The initial velocity for each gun barrel (which had seen proof firi

Who reads Velocity variation over time for NACO rounds?

Author

Susan T. Peters.

Language

EN

Category

nonfiction

Subjects

Technology, Stem