2-Stroke Gasoline Hand-Crank Engine Model, 14" Base_Octagonal this metal helix lets stairwell-scale

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

this polypropylene graduated cylinder set is Class B-tolerant

5 inch dimensions in brass

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

Enlarged three-times life size with seven separable parts exposing cornea

2-Stroke Gasoline Hand-Crank Engine Model, 14" Base_Octagonal this metal helix lets stairwell-scaleTurning 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.