Not peppermint,airplane strut,construction,torque machine,AE McPhereson,1937

Title: Not peppermint candy but an airplane strut. Washington, D.C., May 3. This piece of aluminum alloy which is used in airplane construction is shown after being in the torque machine. The pieces to be tested are locked in the vise and twisted until they break. This piece when started the lines on the pipe were parallel and ran the length of t he pipe. After coming out of the machine the lines are like a corkscrew, before the breakig point is reached. A.E. McPhereson is applying the pressure, 5/3/1937
Creator(s): Harris & Ewing, photographer
Date Created/Published: 1937 May 3.
Notes:
Title from unverified data received with the Harris & Ewing Collection on the negative or negative sleeve.
Gift; Harris & Ewing, Inc. 1955.
General information about the Harris & Ewing Collection is available at http://hdl.loc.gov/loc.pnp/pp.hec
Temp. note: Batch four.
Subjects:
United States--District of Columbia--Washington (D.C.)
Bookmark /hec2009009353/
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