These are three of the best values in a .46-size sport engine on the market.

The G-45 ABC and the G-51 ringed appear similar in specified power output, but I'm told by folks who have run the G-51 ringed that it is good at swinging larger props like 12x5 or 12x6 at good rpms. The XLS .46A and the G-45 ABC wouldn't be comfortable with props of that size by most accounts.

You'll be happy with any of the three. The G-45 ABC is the least expensive of the three, comes with a glow plug and a three year warranty, and is a top performing engine in its size range. I'd happily own any of the three, but if you really want the best engine for the least amount of money, I don't know why you'd need to spend an extra $5 to $15 to get either of the other engines.

The G-45 ABC will provide gobs of power for a Nexstar ARF and will be a great fit for any of the .40-size sport planes you might consider after flying the wings off of your trainer.

If you do spend another $5 to $15, you won't be out anything but a few bucks. The XLS .46A and the G-51 ringed are great sport engines as well.

Good luck and good shopping.