I've just found quite simple method to detemine Z-axis position of COG:
1. Determine where is COG on X and Y axis. I think nobody has a problem to find it.
2. Tilt your copter on the edge of landing skids until you find a balance (copter doesn't tend to flip to right or left)
3. Make a picture. In my copter green line is where I found my COG on X and Y axies.
View attachment 4809
4. COG is where red line crosses green line
What do you think about such a method?
1. Determine where is COG on X and Y axis. I think nobody has a problem to find it.
2. Tilt your copter on the edge of landing skids until you find a balance (copter doesn't tend to flip to right or left)
3. Make a picture. In my copter green line is where I found my COG on X and Y axies.
View attachment 4809
4. COG is where red line crosses green line
What do you think about such a method?