Building Instructions

Pritz Hatchet Planimeter

My first planimeter, very simple and very demonstrative to understand how a mechanical device can calculate area.


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Hot Bulb Pneumatic Tractor

A lego pneumatic tractor based on a hot bulb engine Lanz tractor. Features drive, single pneumatic engine, adjustable ignition point, steering and suspended seat.


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Lego computer : Digicomp

The digicomp was a mechanical computer sold as a plastic toy in 1963. Capable to count, multiply, divide, depending of how it is programmed.

Torque Limiter

An automatic switch-off torque limiter, designed to prevent damage by excessive torque.


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Wheeled Snake

Crawler wheeled snake features drive, steering, and 3 DOF articulated suspensions.


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Piaggio APE

An icon of Italy, features drive, steering, suspensions, and fake engine.


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