Felsenthal High Angle Firing Table

Object Details

Felsenthal Instrument Co.

Description

The U.S. Army used this wooden high-angle firing table when positioning 155 mm howitzer guns firing high-energy shells. The instrument has a white coating on both sides. A yellowed plastic indicator has wooden edges that are held together with brass rivets. The top edge of one side has scales for 100 yards and for range. This side also has three sets of scales for elevation, 10MSI, drift, and TF (target firing?). The sets of scales cover the use of M1 propellant with a muzzle velocity (MV) of 2,100; M1 propellant with MV 2,800; and M1917 propellant with MV 2,370. The left end is marked: 29105 (/) FT 155-S-2 C7 RULE No. 1. The right end is marked: HIGH ANGLE (/) GUN, 155MM. SHELL, H.E., M101 (/) M1 & M1A1 FUZE, M51.

The other side has scales for 100 yards and range along both long edges. The center of the rule has two sets of scales, both for elevation, fuze, drift, and fuze settings of M55 and M67 with M1 propellant. These sets of scales are marked with the letter N. The left end is marked: 29105 (/) FT 155-S-2 C7 RULE N^o 1. The right end is marked: GUN, 155 MM. SH. H.E., M101 (/) M1 & M1A1 FUZE, M51, M55, M67.

The Felsenthal Instrument Company of Chicago made these artillery rules for distribution by the bookstore at Fort Sill, Okla., from World War II through the Vietnam War. For other instruments used to position howitzers, see 1977.1141.25, 1977.1141.26, 1977.1141.27, and 2005.0271.02. For Felsenthal company history, see 1977.1141.01 and 1977.1141.02.

References: "Graphical Site Table," The Field Artillery Journal 35, no. 9 (September 1945): 548; accession file.

Location

Currently not on view

Credit Line

Gift of Ben Wharton Rau and Margery Felsenthal Rau

ca 1960

ID Number

1977.1141.28

catalog number

336412

accession number

1977.1141

Object Name

scale rule

rule

Physical Description

wood (overall material)

plastic (overall material)

paper (overall material)

brass (overall material)

Measurements

overall: 1.1 cm x 29.4 cm x 6.8 cm; 7/16 in x 11 9/16 in x 2 11/16 in

place made

United States: Oklahoma, Fort Sill

See more items in

Medicine and Science: Mathematics

Science & Mathematics

Scale Rules

National Museum of American History

Subject

Mathematics

Artillery

Record ID

nmah_1214739

Metadata Usage (text)

CC0

GUID (Link to Original Record)

https://n2t.net/ark:/65665/ng49ca746aa-98d4-704b-e053-15f76fa0b4fa