The Supporting unit is responsible for the initial rigging of a sling load. It is then the Load Master's responsibility to check the load for deficiencies before actually shipping it .
500 pounds
Long enough so the load can't contact the aircraft.
Fm 10-450-3
2
2
howitzer is a class of gun with many different variants you need to be more specific. but the max range of a M777 howitzer is 30.1 km (rap assisted).
A large cannon fired at a high angle. See the related link to the M198 155mm towed howitzer and the M109A self propelled howitzer.
5
Helicopter design specs refer to this as an External Load. Commonly referred to as a "sling load". Some helicopters use a hoist to lift objects such as a Search & Rescue helicopter. This is a hoist load.
a multiplier of 5
mortar, howitzer