The June, 1933 issue of Popular Science covered this gorgeous "propeller-driven cars" that "hang from a monorail." This is what the future was supposed to be.
An improved airline cab, capable of 155 miles an hour, is the latest invention of the French engineer who developed the trench mortar used during the World War. Suspended on monorails, the cabs resemble airplane fuselages.
Update: Toby sez, "Here's some proper engineering from Scotland.
It's some lovely footage of the Bennie Railplane, a glorious 'Metropolis'-style bullet which sped (briefly) through a twee bit of the Glasgow suburbs in 1930.
It was designed to do 120mph, and to use adjustable aerodynamic 'planes' at each end to trim its lift/downforce.
It's well-described here and here.
Wouldn't it be fantastic to drive to the railplane terminal in your Leyat Helica?"
