I recently tried a 3300mah NiMH pack that was assembled with sub-c cells. The pack was quite a bit larger than the standard 4 AA pack. I have however noticed that the performance of my helicopter seems to have suffered from the extra weight it now has to carry.

How many of you that have switched ot the large capacity battery packs noticed this, or is it just my mind. I also noticed that for some stunts the helicopter will act a little weird, it must be that the CG is now way off.

Is the CG determined from the main rotor shaft? Or does this vary from model to model.

Anyway, I would like to keep the larger pack, but I really dont want to sacrifice any more performance. The old 61 is starting to complaine about all the extra work Maybe I should just get the new YS80 now instead of waiting until next year.

I use to use sub-C packs and have switched back to AA. The weight was not worth it and in the Fury it made it to nose heavy.

"Is the CG determined from the main rotor shaft? Or does this vary from model to model."

All helis balance at the same point that's it's fulcrum, at the main shaft.

Every ounce matters just my 2 cents.

The way to check the CG on any flybar equipped helicopter is to first align the blades with the tailboom... Using a finger from each hand, cradle the flybar near the head (the flybar should be perpendicular to the main frames) and gently lift... Pay attention to the skids as they leave the ground... If the skids leave the ground evenly or the front SLIGHTLY LAST, you are good to go...

Keep in mind that the heli should be in the configuration that you are going to fly it when you do this little test i.e. canopy on and fuel in tank... It is much easier to fly a slightly nose heavy heli than a tail heavy one...