Sky truck, also known as a cargo airplane or cargo plane, is a heavy-duty aircraft used specifically for transporting goods and materials. Some synonyms for this term include freighter, cargo aircraft, transport plane, and airlift machine. These planes are designed to handle large volumes of cargo and are often used for delivering goods to areas that are difficult to access by land or sea. They can carry a vast range of loads, from small packages to heavy machinery. In addition to their practical uses, sky trucks are also sometimes used for military purposes, such as delivering supplies or transporting troops.