ORIGINAL: FatOrangeKat
There is one guy in my club who has the Evolution Trainer System and he hated it, and so did the instructors. He's flown with it a few days and already replaced it. They are broken in at the factory which is nice, but their performance tends to be lacking.
Eh... The PTS engine is a powerful .455. It is just shy of a .46 in displacement.
In terms of power and performance it is indistinguishable for say an Evolution .46 or an O.S. 46 AX when the same props are used on both.
The "performance" is purposely toned down on the planes it is used on, by the use of a rather oblique pitch prop.
This is done to make the planes easier for a novice to control, but it is not indicative of the power/performance of the engine.
If an instructor pulled it out, then he was unfamiliar with the engine, and must have done this out of ignorance, as all he had to do was change the included prop out if he wanted more power.