Wolfgang,
I seem to remember that this kind of beast-of-burden was used to pull the fuel loading tankers for the V2 rockets, didn't it? Looking at the text on that vintage pic w/ trailers, its the same beastie! Now you can have an awesome 'load' to tow!
Any plans for making a scale V2, and its carry-trailer (I know Revell made a 1/69 scale version of the rocket and trailer, had one ~years~ ago. Also make a 1/54 version.) Or you could go cheap/light, and scale up one of the paper kits
http://www.currell.net/models/files_v2.htm
The trailer/erector the V2 was carried on was called a Meillerwagen
http://en.wikipedia.org/wiki/Meillerwagen and I hope to make a close approximation for one of my pair of V2's... (have both the Imex styrene kit and Estes MaxiBrute one. ( PS: Anyone with a wood lathe willing to replicate 'em? )
WhiteWolf