Composite image of an Air Algerie Boeing 737-700C – Image: Boeing

The Boeing 737-700C is an interesting aircraft. What makes it unique is its ability to convert from passengers to cargo depending on how the airline wants to use it. If you have heavy passenger flow during the summer, but more cargo during the winter, being able to convert between the two is quite helpful.

What also makes the 737-700C unique is that, like the Boeing Business Jet (BBJ), it has strengthened wings, different than the standard passenger 737-700. When in passenger configuration, the plane can hold 120-140 seats and fly 3,205nm. In an all-cargo set up, it can haul 40,000 pounds and fly 2,880nm.

The model was launched back in September 1997, when the US Naval Reserve ordered two and called them the C-40A Clipper. This was a big deal, since there had not been a convertible version of the 737 built from the Next Generation-version of the 737 at the time.

The US Navy currently operates 12 C-40As to move personnel and supplies around the world. Think of it as an airliner for the military.