The car had no conventional suspension, relying on flex in the wood frame and seat cushions.
The damper valve took place of the shock absorber in conventional suspensions.
"Ultimately, because the performance of conventional suspensions is pretty good, you have to prove it out on a luxury type of product," Dr. Cole said.
However, the later, larger 197 cc Imp Supreme adopted conventional rear suspension.
A conventional suspension would have required an increase in height to the design.
The lack of a conventional suspension and wheels below the vehicle was its most notable feature, making it quite short compared to similar wheeled vehicles.
The GD-01 had a conventional suspension, featuring wishbones with pushrod-actuated shock absorbers.
In addition, the car, as he proposed it, would cost less to build than the same car with a conventional rear suspension.
Production ceased after one year of manufacture (1930), but the cars were later reissued under the name Aigle, in models using conventional suspension.
The fork was originally a leading link suspension, replaced in 1969 with conventional telescoping-tube suspension.