2-Stroke Gasoline Hand-Crank Engine Model, 14" Base_Octagonal a compound unit for demonstrating

a compound unit for demonstrating multi-rope mechanical advantage in physics activities

Triple tandem plastic pulley with 25/38/50mm ball-bearing wheels on an open-sided 17

Packaged as a biodegradable classroom kit

this metal helix lets stairwell-scale wave-propagation experiments amplify the visibility of standing waves

Supplied as the seven most common classroom sizes

2-Stroke Gasoline Hand-Crank Engine Model, 14" Base_Octagonal a compound unit for demonstratingTurning the hand crank walks students through every stage of the 2 stroke gasoline firing cycle on a 14 inch model, an ignition light firing on compression for visual timing.