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.

The propeller was manufactured by the Stupar Aero Works of Chicago. Max Stupar was an aviation pioneer who was involved in the manufacturing of many products including balloon components and aircraft.

 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 Stupar Aero Works, Chicago, IL
 Physical Description Type: Two-Blade, Fixed-Pitch, Wood Diameter: 182.9 cm (72 in.) Chord: 17.8 cm (7 in.) Engine Application: Unknown Dimensions Rotor/Propeller: 182.9 x 17.8 x 9.5 x 3.2cm (72 x 7 x 3 3/4 x 1 1/4 in.)
 Materials Wood
Varnish
Overall: Wood
Properller: Laminated spruce
 Inventory Number A19300070000 Credit Line Gift of Alden Hydraulic Laboartory (Alden Hydraulic Laboratory is part of Worcester Polytechnic Institute) Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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