Yeah, as pointed out, you may go ahead and break it in on the plane using the restraint system MrStang described. As for just flying it without breaking it in, this all depends on the engine. Some will just not run right until they have three or four tanks through them (some more than that).

What I do is simply mount it on the airframe and take it out to the field and burn fuel through the engine, following the manufacturers instructions on how to do this... usually run on the rich side for several tanks and go with it.

I use the very rich ("four stroke sounds") and alternate very rich for about a minute at full throttle, then lean it out for about 10 seconds, then back to very rich and cycle this through the tank. After it burns out the tank, let it cool for a while then fuel it up and do it again. At some point, it will begin to transition from idle to full throttle very cleanly and give good power and RPM at the rich side of lean. I run it for several flights on this rich side of lean, then adjust it to fly for the best performance but even at that, slightly rich (maybe 300 RPM down from lean at full throttle).

You will still have to work out the transition on some engines, which requires you to "play" with the low speed mixture, but once you have that set so that you don't load up at idle and transition from idle to full without hesitation, well, you are good to go (for low end). High end requires some adjustment from day to day, usually minor in nature, perhaps a couple clicks one way or another, but it is usually done before the first flight of the day and remains that way all day.

As far as the Tower Trainer 40 is concerned, it is a good trainer. I had one and enjoyed it. I sold it in favor of the Hobbico Nexstar Select (why, I don't know.. don't ask.. but I did and solo'ed with the Nexstar). It (the Tower 40) flew just fine, but was a tad smaller than the Nexstar (perhaps why I opted for it) and thus more visible.

Bests of luck with that. You should enjoy it.. don't forget.. work with an instructor!!!


CGr