In the M149 water trailer hook order, which sling-leg arrangement is correct?

In the M149 water trailer hook order, which sling-leg arrangement is correct?

• A. Forward sling legs on the outside and rear sling legs inside
• B. Forward sling legs inside and rear sling legs outside
• C. Both sling legs outside
• D. Both sling legs inside

Answer: (A)

Stability of a four-point sling load comes from how the lift points position the load’s center of gravity and control its swing in flight. For the M149 water trailer, placing the forward sling legs on the outside hooks and the rear sling legs on the inside hooks keeps the front of the trailer pulled toward the outer corners while the rear is secured toward the inner area. This arrangement helps the load stay level and centered between the lift points, reduces pendulum swing, and maintains adequate clearance between the sling lines and trailer fittings or structures. Using any other pattern tends to pull the load unevenly or increase side-to-side movement, raising the risk of contact with the aircraft or instability during flight.

Stability of a four-point sling load comes from how the lift points position the load’s center of gravity and control its swing in flight. For the M149 water trailer, placing the forward sling legs on the outside hooks and the rear sling legs on the inside hooks keeps the front of the trailer pulled toward the outer corners while the rear is secured toward the inner area. This arrangement helps the load stay level and centered between the lift points, reduces pendulum swing, and maintains adequate clearance between the sling lines and trailer fittings or structures. Using any other pattern tends to pull the load unevenly or increase side-to-side movement, raising the risk of contact with the aircraft or instability during flight.