One of the best! A downward directed air jet, which appears to "suck" a flat board, so it stays floating in the air.. That is to most of us quite impossible.

Nevertheless, that is really what happens. How on earth is it possible? Many visitors experience a somersoult by their minds.
This exhibit is an excellent complement to the hoovering ball. It displays the effects of the Bernouilly principle in an excellent way.

Maintenance No

Box
Length: 1000 mm
Width: 710 mm
Height: 720 mm
Tube, length 940 mm