[Kiwi]

Another reasonably simple way is climb at 45 degrees at your normal power setting and let go the sticks. If the plane drops the tail and climbs it is tail heavy or if the nose drops it is nose heavy.

The trouble with checking the C of G by changing power settings is you can have some effect from the engine offset. This is if the down thrust is excessive and you power off and the plane balloons (nose rises) it can be due to too much down thrust and not always the C of G position. Vise versa for up thrust.

There is an article on one of the web sites done by Peter Goldsmith. It is very in depth and goes through the actual sequence you should follow to trim your plane. Getting thrust angles and offsets etc setup in the correct sequence is important and that article is a gem when it comes to setting up a new model.