RE: Club FOX!
I know that the rpm claims by Fox don't sound like much difference between the Eagle IV 60 & 74, but it is very noticeable in flight. I run 11 x 10, 12 x 8, or 13 x 6 on my 74's. I love the way the planes fly with the extra power not really any speed difference, but easy long verticals and constant speed. I have both the ring and ABC versions of each. Get ready for a fairly long break-in process, but you will be rewarded with a real jewel. I have tried just about every type of break-in I have read about. To me, the heat cycling is the key. I use short runs with complete cool down in-between runs. When I put it in the air, I'm pretty easy with it for the first gallon ( not alot of high G's or extended verticals). I have had people offer to pay me to break-in their engines, I just tell them to furnish the fuel and I'll do it for a friend. I love to see people excited about the way their engines run!