John,

Using a balancer after moving the battery pack it took that much weight on the tail to balance the plane according to the manual...105mm behind the leading edge and next to the fuselage. Did you (and others) find the manual's cg point to be in error?

Hope not because I've already melted the lead, slit the tail and epoxied them in. Figured I could always had a weighted spinner if need be but was going to balance to the spec in the manual to start out.

I am guessing as to the actual weight of the lead. I just melted a wheel weight in a spoon and kept at it until I brought the plane into balance. It took two partial tablespoons to do it!

Could it be that the Magnum 91 4-stroke is heavier than the other engines?


Clay