When flying as a Space-A passenger on Department of Defense owned or controlled aircraft the rule of thumb is two bags weighing up to 70 pounds each per passenger. There are additional baggage restrictions when flying on some smaller aircraft. For instance, C-21s have a baggage limitation of one bag at 30 pounds and C-40s allow two bags at 50 pounds each. (U.S. Air Force photo/Senior Airman Evelyn Chavez)