German WW2 Remote-controlled Demolition Tank Official designation:- Sd.Kfz.301 Schwerer Ladungsträger Borgward B IV Total production:- 1,181. The Borgward IV was designed to be driven to site manually by a driver in the vehicle and then positioned and detonated remotely. It was the largest of the three demolition tank designs used by the Germans in WW2. Only four are known to survive, this example is on display in Hall 10 of the Patriot Museum Complex. Park Patriot, Kubinka, Moscow Oblast, Russia.