The PL-12 Airtruk was designed so you could drive a truck up between the tailbooms and load the hopper in the rear of the fuselage without turning the plane's engine off - faster reloading, and therefore cheaper. It's a sturdy little workhorse too, very reliable and operates from rough fields. Huge flaps, very STOL. But mainly I like it cos it looks goofy ;D
One of these made an appearance in the movie
Mad Max: Beyond Thunderdome.
You can find a few more pics on
www.airliners.net, search for "PL-12".
Gryshnak