Originally Posted by
YellowBlueBird
The professor shows the landing gear behind the leading edge of the wing . It will be possible to measure the angle from CG to axel. The question that will be hard to answer is where is the CG vertically. Based of the location of the battlers and balancing weight a good guess is about one third of the distance from the bottom of the wing to the top of the fuselage. Today has been a beautiful outdoor day filled with all of the activities it takes to care for 3 acres of plants and grass.
If I recall correctly, you described it happening mostly at a low speed. Therefore I would worry less about wheel location as compared to leading edge of the wing and focus on wheel location relative to the CG. Low speed ground looping is mostly an inertial forces problem. As for the location of the CG vertically (as viewed from the side), unless you have a really tall fuselage and significant weight off the centerline, I would just approximate.
I echo the challenge of property maintenance. I've got a decent number of leaf dropping trees and two other pieces of property about 40 miles from here. So I get your challenge.