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voltage drop calulations (academic exercise)

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rjquillin

Joined: 13 May 2007
Posts: 123
Location: KSEE

Posted: Wed Feb 27, 2008 8:18 am Post subject: voltage drop calulations (academic exercise)

Exactly.



At 23:41 2/26/2008, you wrote:

 	  Quote: 	
		  Ron,



    So,  the circuit is functionally 3 resistors in series and the 

 middle resistor (load) can only see the voltage drop across it as 

 part of the total voltage drop in the entire circuit. If that's 

 correct than I understand.

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nuckolls.bob(at)cox.net
Guest

Posted: Wed Feb 27, 2008 8:46 am Post subject: voltage drop calulations (academic exercise)

At 01:41 AM 2/27/2008 -0600, you wrote:



 	  Quote: 	
		  



Ron,



    So,  the circuit is functionally 3 resistors in series and the middle 

 resistor (load) can only see the voltage drop across it as part of the 

 total voltage drop in the entire circuit. If that's correct than I understand.



Thanks for the explanation.

Raymond Julian

Kettle River, MN


	


    Getting closer. There are LOTS of resistors. EVERY conductor

    (including the aiframe), every compoent (terminals, studs,

    contacts) and every joint between those conductors cannot

    have zero resistance.  We'll, we could wish for a super-

    conducting system but it won't happen in our lifetimes.



    See:



http://www.aeroelectric.com/Pictures/Schematics/Voltage_Drop_Study_1.pdf



http://www.aeroelectric.com/Pictures/Schematics/Voltage_Drop_Study_2.pdf



    These are two studies of total resistance voltage drop

    in exemplar situations. In both cases, the lower

    conductor in the figure could be a wire (composite

    airframe) or it could be the airframe itself. No matter

    how the loop is closed to keep all the electrons moving

    there will be some losses. Fortunately, most metalic

    airframes are pretty good conductors. I think a Beechjet

    offers something like 0.001 ohms from nose to tail.

    Being a "good" conductor might allow us to ignore

    the effects as tiny compared to the other conductors

    but "good" is never zero.



    Bob . . .

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raymondj(at)frontiernet.n
Guest

Posted: Wed Feb 27, 2008 5:14 pm Post subject: voltage drop calulations (academic exercise)

I got this piece of the puzzle now. Thanks!



Raymond Julian

Kettle River, MN



"Hope for the best,

but prepare for the worst."



do not archive



---

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