RE: Nitro trainers...
Just as an add-on, and in total agreement with RCKen and others, the Tower Trainer 40 is both an excellent value and an excellent trainer. It was my 'first' trainer (second time around after over 20 years of being out of the sport) and it was both fun to fly as well as a real capable aircraft. My only complaint (and this is not a real complaint) is that, for us older guys, it would be nice to have a larger trainer for the visibility. Other than that, and that is more of an observation than a complaint, it's a fine trainer. Mine was originally powered with the Tower 40 glow engine, which was ok, but my instrucrtor and I talked about it and I bought and installed an OS 46.
That was back in 1999 or so, and that plane still flys!! Oddly enough, with the original Tower 40 engine because when I sold it, I took the RX, servos, and the OS engine off. The guy that bought the Tower 40 also bought my Tower 40 engine and installed that one back on the Tower trainer.
CGr.