Tamiya 70251 Rubber Band Trike STEM Kit  [70251]

Tamiya 70251 Rubber Band Powered Trike - Practical STEM Build

The Tamiya 70251 Rubber Band Powered Trike is a compact educational kit made to combine hobbyist fun with guided STEM learning. Builders can assemble the trike to see mechanical principles in action while experimenting with propulsion and motion.

Build and Learn Mechanics

This model has a solid layout at 193mm long, 72mm wide, and 94mm tall, offering a good balance between display size and playability. Powered by a simple rubber band drive, the trike uses a push rod to set band tension so users can watch stored potential energy become forward motion.

Gear Choice and Running Behaviour

The Tamiya 70251 gives two gear choices to tweak performance. Pick the power gear ratio 9:1 for quicker sprints or the stamina 27:1 ratio for longer runs, letting builders test how gearing affects speed and distance.

Assembly Notes and Parts

The kit assembles with snap-fit components plus screws, although basic tools are needed for final build steps. It ships with five No.14 rubber bands and also accepts No.16 bands for alternate performance, enabling hands-on experiments and classroom demonstrations.