Which LD unit load device holds the most weight?

The LD-9 unit load device is specifically designed to hold the most weight of the options provided. It has a larger capacity compared to the other LD types, allowing it to accommodate heavier cargo and more baggage.

The LD-9 is commonly used for larger aircraft and is typically made to hold both standard and oversized containers, maximizing the space available while also supporting the load's weight effectively. This makes it particularly advantageous for airlines aiming to optimize their cargo capabilities.

In contrast, the other units like LD-8, LD-2, and LD-3 have smaller dimensions and weight limits, which is why they are better suited for lighter or less dense cargo. Each of these devices is designed with specific usage scenarios in mind based on their weight capacity, volume, and compatibility with different aircraft, thus influencing the amount of weight they can safely carry.