Range Correction Chart, Felsenthal FAS-3

Description:

This white plastic chart was designed for the U.S. Army Signal Corps. It is a nomogram for finding the range correction in yards of a weapon, by lining up the meteorological correction as a percentage of the range and the range.

On the left is a scale marked “Range Correction in Yds.” On the right is a scale marked “Percentage Meteorological Correction” and on the diagonal between the two is a scale marked “Range in Yds.” According to a label received with the object and stored in the accession file, the object was made in 1945.

The meteorological correction is found from the temperature and wind speed using a related chart called a “sound velocity corrector” (for an example, see 1977.1141.42) .

A mark on the object reads: Range Correction Chart PT-63/TSS-1.

For an explanation of the mathematical theory of this kind of nomogram, see Lipka. For a similar device used for another purpose, see 1985.0636.01.

References:

Joseph Lipka, Graphical and Mechanical Computation. Part I. Alignment Charts, New York: John Wiley & Sons, 1921, pp. 65–

67.

Accession file.

Date Made: 1945

Author: G. Felsenthal & Sons

Location: Currently not on view

Place Made: United States: Illinois, Chicago

Subject: Mathematics

Subject:

See more items in: Medicine and Science: Mathematics, Mathematical Charts and Tables, Military, Science & Mathematics

Exhibition:

Exhibition Location:

Credit Line: Gift of Ben Wharton Rau and Margery Felsenthal Rau

Data Source: National Museum of American History

Id Number: 1977.1141.43Catalog Number: 336427Accession Number: 1977.1141

Object Name: chart

Physical Description: plastic (overall material)Measurements: overall: .1 cm x 26.6 cm x 20.3 cm; 1/32 in x 10 15/32 in x 8 in

Guid: http://n2t.net/ark:/65665/ng49ca746aa-a467-704b-e053-15f76fa0b4fa

Record Id: nmah_1213752

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.