Chain Drive with Tensioner Mechanical Demonstration Model Meters_Electrical providing dense uniform spheres for

providing dense uniform spheres for ramp-and-collision experiments where a heavier projectile is needed than the plastic marbles can provide

Fitted with a grey hand knob for tightening and a small plastic pulley

visible crankshaft

Two-ohm wire-wound fixed resistor in an ABS module with 4mm sockets

and 60mm sheaves on a 4-inch mounting rod

Chain Drive with Tensioner Mechanical Demonstration Model Meters_Electrical providing dense uniform spheres forTensioner pulley keeps chain engagement consistent on this hand cranked chain drive, viewable between clear plates so students watch sprocket teeth grip and transfer torque under load.