Eness,

I know it sounds really unusual.. but.. it is true. I test flew a Killer Kaos for a friend that, as he said, "Just doesn't fly right..." He had purchased the plane and installed his equipment as normal but had installed a 4 stroke engine. At any rate.. the plane climbed a LOT when inverted.... I had seen this before ..so.. landed the plane.. put the battery pack behind the servos in the fuselage moving the c/g BACK about 2 inches.. and.. the plane flew perfectly. I can't explain why this works.. but it does. A tail heavy pattern ship.. will tend to actually fly tail low in turns and have a very difficult time holding a good vertical line and doing a decent stall turn. I'm sure there are some aerodynamics folks who can explain why... but.. I just try to get them to fly right.

Dan