Yes David, that is indeed very true.   BTDT  got some stories to tell of my own :-)

On Dec 7, 2013, at 5:50 PM, David Beierl wrote:

> At 05:24 PM 12/7/2013, Steve Cotsford wrote:
>> I think I said before that I am not an electrical engineer and I am much more at home with hydraulics so perhaps I should
> 
> You can get quite a ways by considering electricity as an analogue of hydraulics.
> 
> psi --> volts
> gpm --> amps
> 
> psi drop x gpm --> hp.  Voltage drop x amps --> wattage (746 watts / hp).
> 
> An orifice or very skinny pipe --> a resistor (but even fat pipes have resistance, see your flow tables).
> Pressure drop across an orifice, skinny pipe, hydraulic motor etc --> voltage drop across a wire, resistor, or load.
> An accumulator --> a capacitor.  Especially an accumulator with input at each end and a stretchy diaphragm in the middle.
> A dual-acting cylinder moving a massive free weight --> an inductor.
> A valve --> a switch
> Engine-driven pump --> generator (or battery.  But batteries use chemistry so they're more complicated in detail.  In very rough terms you can think of a battery as an accumulator).
> 
> Yrs,
> d