by cynr100 » Tue Oct 22, 2013 12:03 pm
Daniell,
The small manual that comes with the AXN should list the position of the Centre of Gravity (CoG) for the AXN normally 50-55mm from the leading edge. With the plane fully loaded for flight it should balance horizontally at this point, a slight nose heavy is advantageous for gliding. So to answer your question, as much weight that is necessary to achieve this balance.
Also check that when all your trims are centred the control surfaces are also centred or neutral and that your servos are securely fixed in place.
The CoG is very important get into the habit of checking each flight, shift the battery to compensate for any change.
Not enough time in the day for all my crazy ideas, I'm not slow, I'm just pacing myself