Tamiya 89975 Mechanical Blowfish Robocraft STEM Model  [89975]

Visible Crank and Linkage Drive in Pink Clear Case

The Tamiya 89975 Mechanical Blowfish makes the workings of a crank and linkage drive easy to observe through its transparent pink body. As the crank turns, the linkage drives the tail fin in a rhythmic swing that produces forward motion through the water.

Educational Build for Beginners

This kit is a clear introduction to mechanical systems and basic hydrodynamics. Parts largely snap together with a few screws and rubber tubing seals to create the waterproof sections, so it is approachable for those new to STEM kits. The transparent case enhances the learning experience by exposing moving parts and interactions.

Performance and Maintenance

Once completed, the Mechanical Blowfish serves as both a swimmer and a display model. Waterproofing is achieved with O-rings and waterproof tape to protect the supplied Type 130 motor, which is pre-connected for easier assembly. The model runs on one AA battery and can operate for several hours depending on battery quality.