Around 1909, Weisz built a 50 hp air-cooled engine.

-Its main characteristic was that it had fixed pistons and reciprocating cylinders.

-A photograph of this engine was obtained, showing its arrangement of fixed pistons and reciprocating cylinders.

-Due to the movement of the cylinders, the fins have a special, propeller-like shape to maximize airflow compared to other designs.

“Weisz Engine”

From Appendix 9: Model prior to the one in the main text. It features drip lubrication, as seen above the engine.

“The Weisz with its Propeller”