Hello and welcome to the thread. Are you talking about a 46 U Can Do that you have the 91 in? If so the 91 should do okay in it but at 3000 FT you probably will have to use 30% nitro to have some power. The Saito 150 is way too much engine for the 46, I don't know if it's too much for the 60 size but it sounds like it is.
For programing the 9 Cap radio I would recommend this book.........
http://www2.towerhobbies.com/cgi-bin...&I=LXFJZ7&P=ML
Thank you guys! The Airplane is a Ucan do 60 to 91 size, and the engine I put on was a 4 stroke os 91 surpass. I am going to try with a Saito 150 as the 91 is underpowered. Anybody has done this? I am worried about the warning not to go any higher than 91. Should I reinforce the firewall area? if so how can I do that?.
Thank you all
Alex