'41 bc12 cg

[Ragwing nut]

Changing the weight IS changing the configuration. On most planes the weight change alone doesn't have enough impact to worry about, but on some it does. If you own one where it does it would be in the specifications for the plane.

No. With the same configuration on a Super Viking, the allowable CG range varies depending on the useful load being carried. It is narrower when lighter, and wider when heavier. It doesn't do this on the tcraft or many others, but it does happen on lots of aircraft in contradiction to an earlier post.

[astjp2]

The Type Certificate Data Sheet/Aircraft Specification is your friend. Look for the section of your specific model and you'll find the CG range. Most have a landplane and one or more seaplane configs. You'll also find the CG arm for seats, baggage and fuel shown as something like (+23), (+40), etc.

book CG is not always accurate, some things must be measured and verified. The TCDS is what the aircraft was when certified, things like the tail-wheel are different based on different configurations, the 3200 is a couple of inches farther aft.