January 2025 Update

I am pleased to announce that after two years of redevelopment work on the rotary valve of our engine, we have begun to achieve substantially longer and uninterrupted testing sessions, with no concerning signs of wear. The details of this valve, along with technical updates relating to the development, will be forthcoming soon. Much of the new valve design is proprietary, and we will pursue patents to cover them.

The engine valve has demonstrated minimal wear after 13 hours of run time with no load. We are using a modified head with liquid cooling to limit variables during testing, and as a result, the head temperatures have remained under control. The plan is to ensure a stable rotary valve system, then add cooling features to replace the liquid cooling system we are currently employing.

Furthermore, there is no external oil being provided to lubricate the rotary valve, except through a 50:1 fuel oil mix used in two-stroke applications. There is considerable work remaining to refine the design to eliminate external cooling, ensure performance under load, and conduct longer endurance testing, among other objectives. The design iterations are already complete, and we have begun to machine them at our facility. We aim to achieve a 100-hour endurance run soon.

Kind regards,
Landon Wilkinson

CEO - Avadi Engines