os .25 FX questions
Hello,
I have some questions and remarks on this topic that may be of interest.
I got an 25FX and a 46FX from OS, and I want to share my experiances with those engines.
First the 25FX, it was broken in rather on the rich side and I'm flying it for a long time with a 9x6 prop with works very well. This engine is running on a mixture 80-20, and the oil is castor-oil (no nitro). I had no problems so far, it's still running well after 3 years (although i ran it in "blubbery".
But the 46FX is a different story. Running in "blubbery", fuel 20% castor oil, 5 % nitro and a prop 11x7. That engine was running perfectly for 100 flights before troubles started. The ballbearings were no longer good. When opening the engine, I found some small metal parts in it which caused the failure of the ball bearings. This metal was the nickle from the sleeve that was coming off ! Whitin 50 more flights, engine was ruined because this nickle was peeling off.