MLC,

I happened to monitor this thread tonight and caught your CG issue. Something does not appear to be right. (I am not saying it is something that you personally did, these posts can easily be mis-interpreted). In all my experience with this model, I have yet to see nor have I heard of anyone having to add the kind of weight you are mentioning to get this plane to balance. The modifications in production on the G2 version resulted in a slightly lighter fuselage. In addition, the CG is coming out, with a YS 1.10 very accurately with all the equipment located in the recommenced positions. Have you made any modification to the location of the servos, etc? The ST 90 is a fairly light motor, virtually the same as the ST 60. Are you using the stock muffler, or a pipe? And last, I assume the model is complete and ready to fly......where is the location of the battery? Please advise and I will do everything I can to assist you with this situation.

BTW - The recommended CG is 6.5" back from the leading edge of the wing, at the root (next to the side of the fuse). This will present a slightly nose-heavy position. CG will vary based on the type of flight performance you desire. The CG can definitely be located more rearward of the recommended location. However, I recommend the initial location for your first flights.

If you prefer to speak with me in person about this, please feel free to contact me directly. My information is located below.

Sincerely,

Ultra-RC
Brian Hughes

609-714-0040
[email protected]