After liberation, he worked as a rocket scientist and led the campaign for compensation for the survivors of the German policy of "extermination through labour".
Rudy's whole family, which consisted of his father Ewald, mother Adele and a younger sister Käthe, moved to Breslau in 1939.
Two months later, Rudy's father was killed by the SS when he collapsed due to exhaustion and was deemed "unfit for work", sent to the camp hospital and given a phenol injection.
Rudy was sent to Mittelbau-Dora to work in a missile factory where he joined a group of prisoners who tried to hinder the production by urinating or throwing sand into the rocket guidance systems.
The campaign group were approached by a firm of class-action lawyers who held that they could obtain damages in the US courts against the companies who were complicit with the Nazi policy.
The lawsuit saw only partial success for the plaintiffs; the companies agreed to pay a maximum of £5,000 to each survivor for their sufferings in the concentration camps as "a goodwill gesture" without any legal responsibility to do so.
[1] In August 2000 the German Parliament passed a law to create the Foundation Remembrance, Responsibility and Future which provided individual humanitarian payments to former forced labourers and other victims of National Socialism.