Re: Can helis transfer any vehicles in the game?
 

They don't have a specific time allotted for operations in FM 10-450-3, MULTISERVICE HELICOPTER SLING LOAD: BASIC OPERATIONS AND EQUIPMENT, but you get a sense of the requirements with the need to inspect the load carrying equipment, as well as the load itself before and after each mission, and the requirements for the ground loading elements (4 people not modeled in ingame loading for the USMC and USN, or 3 for the US Army, USAF, and USCG).

You can read 10-450-3 online (in pdf) here