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Date:         Sat, 7 Dec 2013 17:50:27 -0500
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: making a little headway but need advice
Comments: To: Steve Cotsford <cotsford@AOL.COM>
In-Reply-To:  <05865C78-9A6B-4B93-BAD3-1E755D984F70@AOL.COM>
Content-Type: text/plain; charset="us-ascii"; format=flowed

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


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