1Q20.30 Rolling Spool

1Q20.30 Rolling Spool

A spool rolled down an incline on its axle takes off when it reaches the bottom and rolls on its rim.

A long, narrow ramp with high rims is set at a shallow angle along a table. A piece of rubber is tucked under the lower end of the ramp. A brass disc with a rounded rim and a rubber-covered axle rests at the bottom of the ramp.

Note: If spool slides on the axle rather than rotating wipe the rubber with methanol to clean it

Location: Flywheel: B2-3; Ramp: A1 (narrower ramp); rubber sheet M6-3