The Kontax Solar Inversion Low Temperature Differential Stirling Engine is the only engine of its kind available for sale anywhere in the world.

It has been designed to run from sunlight or lamp light, but it will also operate from many other heat sources, including warm water and the human hand. As long as there is a small difference in temperature between the top two plates this engine will run.

This engine has been meticulously engineered. As any Stirling Engine enthusiast knows, friction is your enemy in LTD models. With this in mind, all potential sources of friction in this engine have been eliminated. Another common problem with LTD Stirlings is heat transfer between the plates. Again, all possible routes for heat to transfer directly between the plates have been eliminated.

Every engine has been tested to run on a differential of 7°C.

A large number of schools and universities have bought our KS90 engines for educational use, the transparent chamber and cylinder make it very easy to explain the Stirling cycle to students. Many of our engines have been kept running for years on top of coffee machines, computers, fax machines, etc. in shops, kitchens and offices all over the world. This solar model will also run from ice. To do this place a thin-bottomed container full of crushed ice on the top plate and the engine will happily runs, but backwards.

Superior engine features:

Major dimensions: