Recent content by Lnewqban

I respectfully disagree. What we have in this case is a balanced mass hanging from two ropes, in successive steps. The only function of the pulley is to keep the amount of tension of both ropes more or less equal between one balanced state and the next by proportionally reducing the length of...

Welcome, @cmars ! Perhaps it is not completely correct to call it mechanical advantage. The fixed pulley, which is the only device in this man-rope-pulley system, offers no mechanical advantage by itself. Please, see: https://en.wikipedia.org/wiki/Mechanical_advantage What is happening in the...

Isn't the force vector represented in the OP diagram pointing in the wrong direction? The outer cylinder would naturally tend to fall induced by the weight of the water that it contains, unless a lifting force is keeping it at the original height. In that case, the calculated value of that...

You are welcome. Condensation formation and dripping flow on tubes and fins, which depends mainly on humidity content of air, tend to complicate the heat transfer calculation. Please, see: https://achp.readthedocs.io/en/latest/ACHPComponents/WetDryHeatExchanger.html...

Welcome! Number of rows in the coils is also important. Calculation is very difficult, due to formed film of water around the tubes (different for height and depth location of each tube and for number of fins). The best way is to have the performance data for that specific coil, which the...

Just imagine a huge mass and a very small mass attached at each end of the string. Then, a horizontal rotation being induced, assuming no friction on the horizontal surface supporting the assembly. Naturally, that mass1-string-mass2 assembly would try to freely rotate about the location of its...

Following @Baluncore line of thinking, it would be interesting to see how is that female shaft supported by bearings and the condition or age of those. Any cut view of the pump-coupling-motor assembly would be helpful for us to see. Normally, bearings and seal go together, and proper alignment...

What is inserted into that female spline?

I don't know how plotting settings can be adjusted in LibreCAD. These may help: https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/How-to-setup-page-size-and-scale-for-plotting-in-AutoCAD.html#:~:text=Select%20the%20viewport%20scale%20by,Click%20OK...

The 3-inch sanitary drain clean-out port is normally located at grade level, as close to the exterior wall as possible, in order to reach farther into the house, but not closer than one foot, so the plumbing snake can be easily fed also into the sewer main direction (commonly, there is a 2-way...

In the case of new multiple dwelling buildings, like yours, there is one tap and one main curb valve that serves all the units. Then it branches out to the meter register of each unit. That "cylindrical casting placed in the ground over the corporation or Utilities Department's curb stop valve"...

The diagram is correct, the text is not.

See another type in the link provided in that post. A flat bronze cover is used in areas where vehicles can run over it. Yes, it is probably buried under vegetation and dirt. The underground pipe leading to the point of connection with the main sewer pipe running below and along the street is...

That PVC pipe sems to be located next to a condenser unit or heat pump. That location is typical of a condensate or overflow pipe coming from an air handler unit. The clean out port you are looking for should look like a plug in a 3 or 4-inch tee. It is normally located at grade level around...

There is no point at which x is located. For each cross-section of the beam represented by any x distance from the point of anchorage to the wall along the beam, there are specific values of shear and moment loads. Without doing any calculation, we know that the beam's cross-section that is...