A Lockheed C5 Galaxy takes off. Photo by Lockheed MartinThe C5 Galaxy is a military transport plane that has been in use with the US Air Force since 1969. Updated engines and systems mean that a version of this plane will still be in service in 2040, which is a very long and impressive career by any measure.In many areas though, the C5 is beginning to show its age. It is well-known for being incredibly fuel-inefficient and unreliable among pilots and operators. However, its huge cargo hold can hold tanks and other large military equipment and transport them anywhere in the world.OUTLINE: 00:00:00 Introduction to the Lockheed C5 Galaxy00:00:10 The Size and Endurance of the C5 Galaxy00:00:33 Competition from Other Military Transport Planes00:00:48 Comparison with the Antonov An-124 Ruslan00:01:02 Comparison with the Boeing C-17 Globemaster III00:01:24 Unique Advantage of the C5 Galaxy00:01:36 Drawbacks of the C5 Galaxy00:01:53 Summary and Conclusion