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This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date 1887-1903 Country of Origin United States of America Type EQUIPMENT-Test Manufacturer Smithsonian Institution
 Physical Description A thick, circular block or wheel. The object is solid and can be stood on its sides. The center "rim" is complimented by an elevated 3.0" center on both side with a 3/4" center hole which extends through the object. A circular impression around the 3/4" center hole on one side indicates this object was held in place utilizing a washer or some support mechanism. The bottom circular area is 1.125" wide. Dimensions 3-D: 8.6 × 14.6cm (3 3/8 × 5 3/4 in.)
Storage: 22.5 × 19.4 × 12.1cm (8 7/8 × 7 5/8 × 4 3/4 in.)
 Materials Wood
Varnish
Possible Iron Alloy
 Inventory Number A19820931000 Credit Line Transferred from the Smithsonian Institution to the United States National Museum. Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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