Pé,


I asked Mr. Å*vajda about that, in a phone conversation.

He first said just run it as you would any ABC engine. The metallurgy is the same as any other ABC engine; a high silicon aluminium piston and a chromium plated brass sleeve.
He even said to just run the engine and fly it.

Medium revolutions does not mean half the RPM of maximum revolution.
So the best treatment, from my experience so far, the engine at 75-80% of its maximum flight prop HP is the most appropriate way to get the results.

That would mean 90-93% of the RPM on the flight prop, or the maximum flight prop RPM, on a 1" smaller prop.

At half the RPM any engine makes only 1/8 of its intended usable HP.
This setting cannot even get the engine warmed up enough to break it in.


My ABC customers are all still using their original piston and sleeve.
Some have already accumulated as much as 70-80 hours on it.

So my technique cannot be too flawed, can it?