Vintage Marine Engine Valve & Propeller Motion Demonstrator by Clarence E. Long redpaint 22" W x 19" D

22" W x 19" D x 28

This example shows those materials clearly

5" W x 3" D x 6

while the lightweight frame makes it suitable for studio

Park captures the relaxed posture-boot propped

Vintage Marine Engine Valve & Propeller Motion Demonstrator by Clarence E. Long redpaint 22" W x 19" Dc. 1930s; Clarence E. Long Marine Engineering School Milwaukee, Wisconsin Mechanical marine engineering demonstrator constructed as an instructional display to illustrate the relationship between propeller rotation and internal valve or linkage motion. Mounted on a painted wooden backboard with integrated base and carry handle, the piece features a brass and steel linkage assembly connected to a small metal propeller. Turning the propeller drives the