Recent content by linguist

Anyone?

Not sure if I have this correct. Ok, I have a "constant load" of say 5 ft-lb & want to acellerate this from a starting rpm to the final rpm figure, find the Torque of the driving engine. T = WK^2 * ΔN / 308 * t T= Acelleration torque ft-lb WK^2 = Total system inertia includes my...

berkeman, Thanks very much for the reply, your correct I am not experienced in physics but I will see how I go with the link you have provided as I need to learn more about this for my small dyno. Thanks again

Hi everybody, just wondering if you could help me with calculating horsepower & Torque. If I have a known "constant load" in ft/lbs & the engine accelerates it from a starting rpm to a peak rpm figure in X time, how can I calculate the Horsepower & Torque. Not really sure where to start...

Thanks Jobrag. I see what your saying. Thanks again Cheers

I need some help in understanding a few things about air compressors & in particular Centifugal Compressors, could someone help me out with this please. This is not homework, just me trying to understand. If a Centrifugal compressor is rated at "just for example only" 10bar pressure @ 100...

edgepflow, Thanks very much for the reply, much appreciated! I have been away for a couple of days myself. I will do some calculations & see how I go. Thanks very much once again, you have been of great assistance!. Cheers

edgepflow, Thanks again, I can see how to calculate the second part of the equation. I just went to try the calculation only to find out that I don't know what units are used for the first part of the equation. Eg: mdot = mass flow rate, is this in Cubic mtrs/min or ltrs/min or cfm etc...

edgepflow, Thanks very much for the reply, much appreciated. Could I ask for a working example of the formula so I can see how to do it correctly. I am not sure how to go about the the last part of the equation which is: { [ (P2 / P1 ) ^ (k-1)/k ] - 1 } From a working example I can...

Could someone help me with getting an understanding of the equations for the power required to compress air please. I found this Calculator on the internet: http://www.engineeringtoolbox.com/horsepower-compressed-air-d_1363.html I am unsure if it is suitable or accurate enough etc. I see...