Buckminster Fuller drew
a “sketch”, below, for car No.4, which was never built.
The caption which accompanied this drawing stated;
With the one-half-pound-per-horse-power gas turbine coming of age, the trend is to
re-explore promptly the possibilities of earth-bound vehicles. Pictured is the Dymaxion
No.4 featuring coupled-steering of all three “duo-tired” wheel assemblies. Each wheel
assembly contains its own gas turbine. The fuselage is suspended by three aircraft type
vertical aerol Struts, and has a retractable rear wheel tail boom for lengthening wheel
base at speed. It is 7 feet wide and 10 feet long [contracted] with cross-wind “fairing”.
It has a 7 foot driving divan, convertible into a large bed. It may “revolve into” half the
parking length of present cars. The top is a convertible aluminium watermelon type.
It has e fared belly with high clearance for field work, will “gun” high speed turns
without skid. Weight 960 pounds.

The quote and photo above are from; The Dymaxion World of Buckminster Fuller
by Robert W. Marks published by Southern Illinois University Press in 1960.