Bingo Stig.
The Crouch-Bolas Dragonfly it is.
Counter-rotating 9' props, twin tails; controlled airflow, slots and full flaps gave STOL operations. It could take-off and land in 30', and observers described how, while flying as slow as 16 mph, the plane was able to go up and down at 50-70° angles.
TC has declared Open House.
Looks like a race between RD and RR.......