Which pair of link counts (front, rear) is correct for collapsible fuel drums?

Which pair of link counts (front, rear) is correct for collapsible fuel drums?

• A. 3, 55
• B. 55, 3
• C. 3, 1
• D. 1, 3

Answer: (A)

The key idea is how sling-load rigging controls the load’s attitude and stability during a helicopter lift. For collapsible fuel drums, the front and rear link counts are chosen to shape how the drum sits and how it swings under flight loads. A short front segment (3 links) keeps the forward end close to the lift point, helping maintain a level, predictable nose position and limiting pitch changes. A much longer rear segment (55 links) provides a stabilizing tail that resists swinging and helps keep the drum aligned with the aircraft’s centerline, reducing pendulum motion and maintaining proper clearance. This combination minimizes tilting and instability during flight, which is why the pairing with a short front and a long rear is used. The other options would disrupt the load’s attitude by swapping lengths or using inappropriate counts, leading to less stable, more dangerous sling loads.

The key idea is how sling-load rigging controls the load’s attitude and stability during a helicopter lift. For collapsible fuel drums, the front and rear link counts are chosen to shape how the drum sits and how it swings under flight loads. A short front segment (3 links) keeps the forward end close to the lift point, helping maintain a level, predictable nose position and limiting pitch changes. A much longer rear segment (55 links) provides a stabilizing tail that resists swinging and helps keep the drum aligned with the aircraft’s centerline, reducing pendulum motion and maintaining proper clearance. This combination minimizes tilting and instability during flight, which is why the pairing with a short front and a long rear is used. The other options would disrupt the load’s attitude by swapping lengths or using inappropriate counts, leading to less stable, more dangerous sling loads.