What is the ACL in gallons for the M149 water trailer?

What is the ACL in gallons for the M149 water trailer?

• A. 400 gallons
• B. 200 gallons
• C. 600 gallons
• D. 100 gallons

Answer: (A)

ACL here means the allowable load for an external sling lift—the maximum amount of water the M149 trailer can safely be sling-loaded during air assault operations. That value is 400 gallons, not the trailer’s total on-ground capacity. The full tank can hold more, but for airborne lifting the weight must stay within helicopter lift limits and maintain proper balance and handling. Water weighs about 8.34 pounds per gallon, so 400 gallons is roughly 3,340 pounds of water, plus the trailer and rigging. That total stays within typical external-load limits and provides a safety margin for dynamic flight forces, which is why 400 gallons is designated as the sling-load allowance.

ACL here means the allowable load for an external sling lift—the maximum amount of water the M149 trailer can safely be sling-loaded during air assault operations. That value is 400 gallons, not the trailer’s total on-ground capacity. The full tank can hold more, but for airborne lifting the weight must stay within helicopter lift limits and maintain proper balance and handling. Water weighs about 8.34 pounds per gallon, so 400 gallons is roughly 3,340 pounds of water, plus the trailer and rigging. That total stays within typical external-load limits and provides a safety margin for dynamic flight forces, which is why 400 gallons is designated as the sling-load allowance.