Lnewqban's latest activity

The piston pump valve requires a pressure difference to lift it. That pressure drop reduces the depth of the vacuum that can be pulled...

A piston pump needs valves, a gear pump does not. If the valves are spring loaded, one way check valves, they will reduce the vacuum you...

I think that misses a triangle 1-24-20, for example, IIUC (see image in #2 above.)

And 1-7-24 as well.

Using symmetry: 8 triangles per half-quadrant times 8?

This still could trip an RCD depending on the path of the current on the water pipe. The pipe from the house to the shutoff valve may be...

Is there any grounding for the water contained in the plastic pipes system? Could the grounding of the water heater be considered a...

So piston pumps did much better than gear pumps but using piston pumps for modern engines seem to be a little bit of overkill based on...

Yes, you could, but its reciprocating mechanism would increase complexity and cost, number of failure points, and vibrations at high...

Thank you so much.

Robert, My sincere sympathy to you and your family at this sad moment. I have enjoyed learning Physics from the many contributions of...

Thank you for the update Robert, and I'm very sorry for the loss to you and your family. Paul was an amazing member here, with many...

@jojosg I would like to clarify that each of these L-shaped members work very differently than the members of a truss (like the one in...

Gear pumps are normally used for liquids only. Please, see: https://en.wikipedia.org/wiki/Vacuum_pump...

@jojosg, there are a number of issues, so it's complicated to explain. But here is an attempt... I've written some of your equations...