16 inch piston with a 4 inch outlet

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Discussion Overview

The discussion revolves around calculating the force required to push a 16-inch piston down in a cylinder with a 4-inch outlet pipe, specifically focusing on the parameters needed to achieve this within a specified time frame. The context includes aspects of fluid dynamics and pressure calculations.

Discussion Character

  • Technical explanation
  • Mathematical reasoning
  • Homework-related

Main Points Raised

  • One participant presents a scenario involving a 16-inch piston and a 4-inch outlet pipe, seeking to determine the weight needed to push the piston down and expel water in a specific time frame.
  • Another participant references the fundamental equation of pressure (P=F/A) and inquires about the available parameter values to assist in the calculations.
  • A further response emphasizes the need for additional parameters beyond area, suggesting that understanding the essential head and translating pressure into feet could be critical for solving the problem.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the necessary parameters for the calculations, indicating that multiple views on the approach and required information remain in the discussion.

Contextual Notes

Limitations include the lack of specific values for pressure and time, as well as the need for clarification on the essential head required for the calculations.

Who May Find This Useful

This discussion may be of interest to individuals studying fluid dynamics, engineering students working on related problems, or anyone involved in practical applications of pressure and force calculations in hydraulic systems.

notinthebox
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If I had a 16 inch piston in a 16 inch by 60 inch cylinder( they fit and are water tight).
It is standing on its end
At the bottem I have a 4 inch outlet pipe with 2- 90's and a pipe going back up 40 feet
How many pounds would I need to put on the 16 inch piston to push the piston all the way down to the bottem and all the water out of the 16 inch pipe.( In 10 to 20 seconds or so)
Both pipes are full to the top when the weight is added.
I only need to know how to find out to do the math but the problem would be good to have done.
 
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First principals:
P=F/A
which of these parameter values do you have?
 
I gave the area I am looking for the other 2 for the pressure for 40 feet and a time frame
 
Try and show some solutions or something you worked on, so I can correct or help you!
What is the essential head you want to achieve? You say you only have the area? But there is another parameter which is a must?
F_required = P/A... Do you not think this will get you somewhere?
1 psi = ? feet? Try translating this...
 

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