Where is the center of gravity of the empty glider located?
If you measure the location of the main wheel and tail wheel (reference to something such as the glider's nose), and the weight each of them carry...you can do the math to answer that question.
Where is the center of gravity when the pilot is in the glider?
Climb in, and then take the same measurements.
Now I know if I need to add trim weights to the nose or tail, and how much.
Determining center of gravity location is critical for safety of flight and good handling characteristics. I'll do these measurements and math more than once so I can be very confident of the results.
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