The George Bennie
The Bennie Railplane was a form of rail transport invented by George Bennie (1891–1957), which moved along an overhead rail by way of propellers. Despite superficial appearances, it was not a monorail, as it used both an overhead running rail and a guide rail below. It was intended to run above conventional railways, separating faster passenger traffic from slower freight traffic. A prototype ran over a 130-yard (120 m) line at Milngavie near Glasgow, Scotland in the 1930s, but Bennie was never able to secure funding for further development and went bankrupt in 1937.