Recent content by Roger T

This question was asked because it is actually linked to the question in DIY for a dingy rib automatic start syphon system, Information that I have found so far: Normal Human can blow 1.3 psi Athlete can blow up to 1.9 psi. Flow rate of 10mm x 1000m tube at 0.0001 bar is 4 litres an hour, or...

Summary:: How much air pressure could a 1 metre long by 50mm ISD pipe blanked at the top end, submerged in 300mm of water at 10 dg angle produce. Pneumatic question Air pressure in a submerged pipe. How much air pressure could a 1 metre long by 50mm ISD pipe blanked at the top end, submerged...

Hi Dullard, The 32mm tube would raise the water in the outlet pipe to the same level if it was 32mm, butt it is 10mm, the analogy of the jack was purely to demonstrate by turning it upside down, push fluid large into small, instead of small into large in the case of the jack...

Hi Dullard, Yes all tubes start dry, the water level that I'm showing in the diagram is to show the air that is trapped, it normally ends up three times as high in wet spells, if the system started to syphon obviously it would not get to that height, but the more water the more pressure created...

Hi, Sorry about that typo, yes 600mm I have edited that & modified the drawing,

The theory is that that the trapped air in pipe A would create enough pressure to raise the water 600 mm in pipe C, Design and parts: 32 mm x 1 metre pipe (A) running from the stern floor (open end) forward with the front end raised 100 mm, then turned 360 deg and reduced to 10 mm (pipe B)...