The Super Tigre G-61 Ringed engine is available for $84.99 before discounts at Tower Hobbies. At that price, it's actually less expensive than many .46-size ball bearing engines - O.S. .46 AX ($109.99), Thunder Tiger Pro .46 ($89.99), and Evolution .46 NT ($89.99) to name a few.

This would be a great choice for a .60-size trainer ARF like the H9 Alpha .60, Thunder Tiger Tiger Trainer .60, or the Hobbico Hobbistar .60 ARF. It's also plenty fast and powerful enough for sport planes.

I bought one for my Sig King Kobra Sport/Pattern kit, and I've been really pleased at the ease of break-in and tuning. It comes with a three-year warranty from Hobby Services, the same folks who provide warranty coverage for O.S. Max engines here in the U.S.

A ringed engine like the G-61 ringed will last forever and will run better the second year you own than the first year. You can spend a lot more if you want to, but if there's a downside to flying a Super Tigre G-61 ringed, I sure haven't figured out what it is yet!