I crashed my Edge 540 into a tree a while back and got it fixed. I'm struggling to get the exact cg position. The manual calls for a 94mm from the leading edge. The person that fixed it for me balanced it and told me it is slightly nose heavy. I flew the plane a couple of times with no hassles - it doesn't feel that much nose heavy, it comes in a tad hot, but nothing extreme. Now I decided that my Edge looks so dull and boring without a pilot in it - so I want to put one in. Can't find a nice pilot anywhere, so the crazy person I sometimes am found a old teddy of mine with a football helmet on its head and decided he is perfect! I put the teddy (from now on pilot) in the canopy to test the weight. I do not have a long enough ruler to get the cg at fuse and then determining the the position/point at the wing tip. I'm also not sure whether the wing tappers a bit (it doesn't seem to, but I can be wrong). It's just that if I calculate 94mm from the leading edge at the wing tip backwards it seems to just be to far back.

So I taped two rulers together and tried to get a straight line to the wing tip that way (using the tube where the wings slide in as a reference). Lets say that I determined the cg correctly when doingthis (without the pilot it balances slightly nose heavy here) - with the pilot it goes tail heavy. When I glued the pilot in I mounted it in the middle of the "cockpit" (it cant go further forward anyway). Now the pilot weights around 2 ounches. Now to compensate (I'm hecked scared of a tail heavy plane) for this a bit, I mounted a sinker (got it from my fishing gear) just behind the fuel tank in the nose (its about the same weight as the pilot), but because it's not right at the front of the nose (can't get into there and get it down properly) it doesn't balance out all the weight. Now I'm still about 1 ounch tail heavy - The tail drops slightly, I shall say about 30mm when I hold it at the wing tips in the air. The tail doesn't touch the ground, it just drops and then hangs there. I attached a photo (an old one which I used to asked another question a couple of months ago) - indictating where I balance it on the wing tip (not 100% to the mm)

Do you think this is going to be a struggle in the air or not? I have never flown a tail heavy nitro plane before. Only an electric, but it was waaayyy tail heavy and I know it almost didn't end good.

The plane is aGreen Models Edge 540 with a 60 ASP engine up front. If I calculated the CG to far infront of the plane then it will be fine - because then its going to be nose heavy I think - then I can correct it from there. I'm one of those people who works on the worst case scenario, that's why I'm rather working on the cg which has more the tendency to make it tail heavy.

If this is too difficult to answer, then I totally understand. I know I'm not giving a lot of info regarding this. It's just something which is bothering me a bit and thought while I'm doing nothing at work I'll ask .