This artifact is from a collection of propellers used by Professor David L. Gallup in 1911 experiments conducted at the Alden Hydraulic Laboratory of the Worcester Polytechnic Institute in Worcester, Massachusetts.

The Gallup whirling arm experiments were one of the first comprehensive attempts to test the efficiency of propellers in the world. In 1912 the same testing apparatus was used by MIT student Frank W. Caldwell, who went on to become a leader in the development of propeller technology in both government and industry.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Country of Origin United States of America Type PROPULSION-Propellers & Impellers Manufacturer Worchester Polytechnic Institute
 Physical Description Type: Two-Blade, Fixed-Pitch, Wood Diameter: 242.6 cm (95.5 in.) Chord: 36.8 cm (14.5 in.) Engine Application: Unknown Dimensions Rotor/Propeller: 242.6 x 36.8 x 10.2 x 8.6 x 1.3 x 3.2cm (95 1/2 x 14 1/2 x 4 x 3 3/8 x 1/2 x 1 1/4 in.)
4 Boltholes.
 Materials Wood
Putty
Varnish
Steel
 Inventory Number A19300073000 Credit Line Gift of Alden Hydraulic Laboratory (Worcester Polytechnic Institute) Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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