At 03:39 PM 1/4/2004, David Marshall wrote: >Is it just me or is this email considered offensive? > >Speaking of bullshit... YOUR answer is bullshit. George is known to be...um...ah...brusque with incorrect info or other things he disagrees with. No, I cannot tell a lie, he's downright rude, not quite the same as offensive I think, but no doubt he leads an interesting life. :-) But it's true that your formula is wrong (E = IR, it's *C* that = pi r^2) and your guess of half an ohm for the wiring resistance is really outrageously high*, and would indeed result in the voltage drop George mentioned -- except that the circuit would no longer be consuming 210 watts at that point and you get to follow Mr. Newton down the rabbit hole of the Calculus of Infinitesimals to find out where it would actually settle. Also, unless you're running your Vgon at sea or in dilute nitric acid, not likely that much will change in the wires themselves over time. The crimps and switch contacts and such are another matter. *The actual resistances are low enough that they would probably be commonly expressed in Siemens, the unit of conductivity which is 1/ohms (the old name was "mhos"). Most people don't have access to a meter that will measure such low resistances and in any case it's the voltage drop that we mainly care about in troubleshooting -- if it's too high there's a problem, so fix the problem until the drop becomes reasonable. If for some reason we care about the resistance, it's calculated from the current and voltage drop. You're on the right track with the wiring, just have some numbers wrong... :) d
-- David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/ '84 Westy "Dutiful Passage" '85 GL "Poor Relation" |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.