Which method is NOT preferred for improving in-flight load stability?

The method of reducing speed is not preferred for improving in-flight load stability because it does not effectively address the root causes of load instability. In-flight load stability relies heavily on the positioning and attachment of the load, as well as its weight distribution and the use of appropriate equipment like slings.

While reducing speed might decrease the turbulence or movement caused by wind or sudden maneuvers, it does not fundamentally stabilize the load itself. The preferred methods focus on ensuring that the load is secure and properly balanced, such as by changing load positioning to lower the center of gravity or by removing unnecessary weight to alleviate excess load pressure on the harnesses and slings. Adjusting the diameter of the sling can help create a better fit for the load, enhancing stability by preventing movement during flight. Accordingly, adopting these strategies is more effective in achieving load stability than simply reducing speed.