File talk:Hydraulic inductor model.svg

OK at first glance, but hyrodynamically problematic.

Anyone who has studied hydrodynamics knows -- or should be made aware -- that the spindle will not turn regardless of water pressure. The high pressure water exerts the same pressure on the advancing vane as it does the receding vane. The area of each vane is identical, as it's it's average distance from the axle. The net force is a zero moment around the axle. Similarly, turning the axle by hand would not result in a net movement of water as the vanes leaving the 'exhaust' side of the device will transport the same volume of water back to the inlet side, through the bottom section of the device, that the top section of the device delivers from the 'inlet' side.

That said, at first glance, it serves it's purpose. — Preceding unsigned comment added by Brigman (talk • contribs) 06:02, 7 March 2018 (UTC)

This observation is correct - and unfortunately I only realised this error some time after uploading this file 7 years ago - anyone setting out to design an actual physical model using this concept would have to make some modifications to prevent the vanes on the return path past the outlet from displacing the same volume of water. Something like this comes close, although it sadly does not work in both flow directions. --Jocajo (talk) 03:08, 7 December 2020 (UTC)

Would something like an inverted Roots pump work, or the inverse of a gear pump? (see on the right)

Answer to myself: Not really - the lobes/gears run "in the opposite direction of what a layman expects" - and so the confusion might be too great ... --Haraldmmueller (talk) 16:38, 10 April 2021 (UTC)