In the early 1970s the Russians followed the American jet train research by sticking two Yak-40 turbo-jet engines to the lead car of an ER22 train. The SVL (high-speed laboratory car) was intended to be used on the Troika Express and during testing is was able to reach speeds of 180mph (250km/hr)..

Like it’s American counterpart it never really went any further than that.. We can only guess, but I suspect that the only more expensive than trying to fly over dirt would be trying to fly over dirt on rails.. Jet fuel costs, noise levels, and probably just the fact that this is plane old silly contributed to the closing of the programs in both countries..

It’s a real shame that when projects like this end there is no budget for storing them for later viewing.