Comments on the chuter and the video
The chuter - see picture - has side walls held apart at the front by a piece of wood (brown colour). It has no bottom, and water and air are fed in to it ONLY above the ‘knife’ level. The oscillation of the chuter can be adjusted - see picture of the pivot mechanism.
The video - listen to comments and watch for the meniscus of water in the chuter from about 00.15 to 00.32 seconds on the track. The next view shows a flotation collar being used and the final view is of the output end of the tube.
