RE: Tower Hobbies Fun 51
The Fun 51 is easy to build, but I would replace the plywood engine bearers with hardwood (maple or beech). The landing gear has a wide stance that makes for good ground handling, but it is soft and starts to spead out after some use--just like wire landing gear. The Fun 51 is fun to fly with a plain bearing 40, but more power--say a Norvel 40--would help with knife edge and vertical stuff. I tried an OS 46LA on my Fun 51, but didn't like all the vibration. The Tower 40 with an 11X4 APC prop gives good sport performance including knife edge but no hovering worth mentioning.