The history of RC-helicopters
During my writing of the history of RC-helicopter articles for the KNVVL magazine I found some interesting movies where Dieter Schlüter tells about his pioneering years.
Here are some real vintage RC helicopter history videos. They show Dr. Dieter Schlüter flying some of his first truly controllable RC helicopters.
If you like to know more about Dieter Schlüter: http://www.dieterschlueter.de/