To: Dave (who hails from a beautiful part of Canada when it is not flooding) Jackson.
The use of a Robinson head would work as any downward force exerted by one of the pilots would bottom out the lever arm) (pilots’ seat) on the spindle tusk causing the entire assembly to pivot on the teeter hinge driving the opposite pilot upward. If the opposite pilot pushes upward prior to the assembly pivoting on the teeter hinge he will experience zero G., which in this case is not dangerous. And, it could be fun until his spindle tusk bottoms out and then he is jarred back to reality when his butt hits the seat.
Although this could be made to work there is a problem in that the pilots’ seats must be offset by 18-degrees. Plus, you could only have two pilots.
Look into this possibility.
