Lockheed C-130A Hercules
The Lockheed C-130 Hercules has been in constant production since 1954 giving it the record for the longest production run of any military aircraft. The Hercules, or "Herk" was designed in response to a U.S. Air Force requirement for a turboprop powered tactical transport to replace the C-119. It has proved so successful that they are now in use with every branch of the American military and have served in the militaries of more than 50 nations. A total of 231 of the initial "A" models were built. Most went to the U.S. Air Force, but twelve of them went to the Australian Air Force. The Hercules is very adaptable, and many have been modified for duties other than cargo carrying. C-130s have served as heavily armed gunships, aerial tankers, weather research aircraft, aerial firefighters, and with commercial airlines.