A challenging thing to make, even Stuart concede it requires a good standard of workmanship to function effectively.
This one runs very well on air, pumping water down to a few strokes a minutes - there's some video of it here. With the air pressure increased it quickly emptied one vessel into the other on our test rig.
length/inches | 9 |
width/inches | 5 |
height/inches | 3 |
weight/kg | 1.2 |
cylinder material | gunmetal |