Never got off the ground

Courtesy of my friend Doug, a piece of automotive history, the Helicron:

In the late 1930s this one-of-a-kind Helicron was placed in a barn and forgotten. More than six decades later, this odd, lost little gem was rediscovered, rebuilt, and reintroduced to the world. Although the manufacturer is unknown, it's believed that this car was built in France 1932.
Following World War One, it was not uncommon for recently displaced airplane engineers to look towards the automobile industry for employment. As in this example, a few entrepreneurs developed propeller power cars, based on the notion that propeller power was an efficient means of moving a vehicle. On this car, when the wooden propeller is spinning at full speed and efficiently, this little 1,000-pound boat-tailed skiff can hit speeds exceeding 75 mph. This is the one and only Helicron in existent, owned by the Lane Motor Museum in Nashville, Tennessee.