Recent content by stickers

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    Master in Physics vs. Bachelors in Engineering?

    Hi guys, thought that I could use a little more guidance and advice from those who are already in the field. I've searched around, but the situation I am in is rather different. I'm from a very tiny island in south-east asia and have a BEng in Engineering (Automotive) from Australia. The...
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    Why Do Power and Torque Curves Differ Between Imperial and Metric Systems?

    Ah.. so that's how. I've seen this 9549 number before, but couldn't figure out how it was derived. Thanks! But I've tried plotting typical values for torque for this equation, and I still don't get the typical curves. That equation means the curves will intersect at 9545rpm isn't it? How do...
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    Why Do Power and Torque Curves Differ Between Imperial and Metric Systems?

    Hi all.. I've been seeing the famous equation which 'converts' horsepower into torque: HP = Torque (lb/ft) * rpm / 5252. The 1/5252 comes from 2*PI/33,000. Power (rotational) is simply torque * angular velocity, isn't it? When I try to plot the imperial version, I get the typical graph with HP...
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    Electric Superchargers: Can E-RAM Meet Engine Requirements?

    Ah, that sounds more like it. This is not including the mechanical and other losses of the supercharger itself? What equations did you use to derrive this number, and what are the variables affecting it? I suppose it's not the simple thermo-fluid equations we get in 2nd year huh.. =)
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    Electric Superchargers: Can E-RAM Meet Engine Requirements?

    mm.. you mean that an axial type fan cannot compress air? or will it compress it to a certain pressure before the blades 'stall' and the air 'backflows' the blades. Those electric superchargers that you mention should be a centrifugal or a roots type sort of pump? Anyway, I just realized...
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    Electric Superchargers: Can E-RAM Meet Engine Requirements?

    Ah.. yep I'm aware that matching pumps to systems requires much more work than that, and involves coming up with pump and system characteristic curves and such, and that pumps are designed to operate within specific range. What i tried to do was compare the output of the pump vs the...
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    Electric Superchargers: Can E-RAM Meet Engine Requirements?

    Hi all, finally thought i'd post something here. I'm a 2nd year mech engrg undergraduate and I've come across this electric supercharger called "E-RAM". There are many other versions out there but this seems to be the most 'promising'. It's basically an electric motor with an axial type...
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