Sound Velocity Corrector, A Mathematical Chart

Description:

This device assists in calculations of changes in the range of a gun because of meteorological conditions, particularly wind speed and temperature. A rotating disc and pointer attached to the plastic base have the scales required to correct for wind speed. A scale toward the bottom of the base gives the temperature correction. Both of these corrections are in percentages of the range. Summing them gives the total meteorological correction as a percentage of the range. One then can use a range correction chart to find the actual range correction.

A mark on the front of the instrument reads: Signal Corps U. S. Army (/) SOUND VELOCITY CORRECTOR PT-62/TSS-1 (/) Order No. 3531-CEGSA-45 G. FELSENTHAL & SONS - CHICAGO.

The instrument was designed and made for the United States Army by G. Felsenthal & Sons of Chicago in 1945. It had Felsenthal designation FAS-2.

For a related range correction chart, see 1977.1141.43.

Reference:

Accession file.

Date Made: 1945

Maker: G. Felsenthal & Sons, Inc.

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: 1977.1141.42Catalog Number: 336426Accession Number: 1977.1141

Object Name: calculating disc & chartchart

Physical Description: plastic (overall material)Measurements: overall: .1 cm x 26.5 cm x 20.2 cm; 1/32 in x 10 7/16 in x 7 15/16 in

Guid: http://n2t.net/ark:/65665/ng49ca746aa-93c3-704b-e053-15f76fa0b4fa

Record Id: nmah_1213917

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