A mechanical device used for calculating area on an arbitrary shape.
My first planimeter, very simple and very demonstrative to understand how a mechanical device can calculate area.
A lego pneumatic tractor based on a hot bulb engine Lanz tractor. Features drive, single pneumatic engine, adjustable ignition point, steering and suspended seat.
An automatic switch-off torque limiter, designed to prevent damage by excessive torque.
Crawler wheeled snake features drive, steering, and 3 DOF articulated suspensions.
A Continuously Variable Transmission (CVT) with mechanical tachometers.