December 2024 Update

Hello,

The Avadi team has been focused on building and testing of the new rotary valve design since last fall, which is performing well after changes were made to incorporate a simple liquid cooling system. The MA-250, as shown in all prior marketing, has been air-cooled and we intend to produce and sell primarily air-cooled engines. The cooling system has proven useful in furthering our understanding of the rotary valve and how to improve its longevity, reduce oil burn, and increase power output - while keeping the cylinder head components at acceptable levels. Once we are satisfied with the rotary valve system components, we can better address cooling. Conceptual designs are in the works for locating a cooling fan which will simultaneously perform and function as cooling fins would in a stationary typical air-cooled head would. Since the fins will rotate this will prevent them from needing to be as large as would typically be necessary to dissipate heat, which is critical for the weight and size constraints of UAV and compact genset applications we intend to serve.

Within the last week, the team has achieved new records for uninterrupted endurance runs on the new valve and intends to achieve 100 hr endurance runs within the near future. Since the valve design was established in October, we have been testing various materials for compatibility. We are happy that this design is simple to construct, and does not currently employ elaborate materials or processes. Achieving success with these materials however is a delicate balance of weight, heat dissipation, surface treatments, wear, and friction considerations. If rotary valve degradation after these runs continues to remain minimal, the final step in our development prior to production will be cooling system optimization and performance tuning.

This year we have brought nearly all development processes in-house and local (whereas previously we had operations in Canada and the US), which includes the engineering design, CNC-machining, prototype development and testing operations. This has reduced our RnD cycles from months to weeks. We are excited about 2025, and continue to receive organic enthusiasm from the broader market - which encourages us to complete the engine development and aim for production as quickly as possible.

Thanks for your continued interest. Check out our instagram page for some more updates here.

Landon Wilkinson
CEO Avadi Engines