Hexatron Engineering Company in Salt Lake City, Utah, has the Hexadyne Aviation Division that in their day, in conjunction with Weslake (see) from the UK, developed two- and four-cylinder engines.

“Hexadyne P60”

-The P60 came out initially with 58 hp at 5,500 rpm, today it gives 60 hp at 5,750 rpm. It is in production from 1997 until today.

“The P60 with more definition”

-While the crankshaft rotates at 5,750 rpm, with the reduction gear, the propeller does it at 2,300 rpm. The cruise power at 75% is 45 hp.

-It can use MOGAS fuel or Ethanol-free LL.

-In other words automobile Motor-Gas, as it is called in the USA, and Low Lead aviation gasoline, Ethanol-free. The engine has electronic fuel injection.

From Appendix 10: Another view of this twin-cylinder engine at an aeronautical exhibition.

“Modelo P-60”

It looks like there exists a new 4-cylinder design, but we do not have any information yet.