Joules per bang...

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Brett Miller <brmtesla2-at-yahoo-dot-com> 

Luke,

Tesla list <tesla-at-pupman-dot-com> wrote:

 >Original poster: "Luke"

 >Thanx for the anaology since I don't have a grasp of the joules thing I
 >will have to go figure it out. Guess im off on the next quest. :)
 >Can I ask why you say there is 7.5 joules per bang?

E (Energy in Joules) = .5 * C (in Farads) * V^2 (Voltage Squared)

Here's a piece of C source code you can compile in UNIX or Linux (using 
gcc), dos (using bcc), or on Windows with Visual C++:

/*
  * joules.c -- find joules (W-s)
  *
  *  Copyright (c) 2000, Eddie Kovelan and Sam Goldwasser
  */

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

main()
{
   float E, C, V;

   printf("\n \
    ******************************************************************\n \
    *  This program finds the energy (J) stored in a capacitor (uF)  *\n \
    *  at a specified voltage (V).                                   *\n \
    ******************************************************************\n");

   printf("\nEnter voltage (V): ");
   scanf("%f", &V);
   printf("Enter capacitance (uF): ");
   scanf("%f", &C);

   E = (.5 * C * (V * V));

   printf("\nTotal energy in Joules (W-s) = %4.3f\n\n", E * 1e-6);

}

If you need help with understanding why the equation governs energy 
discharge from a capacitor, consult a general physics textbook.  Hope this 
helps...I have to say though, it's somewhat funny to me when you ask for 
anecdotal information, then turn 180 degrees and complain about the 
anecdotal nature of what you have been given.

-Brett

PS:  By the way.  I have used computer modeling to predict quantities 
pertaining to both coil construction and coil behavior and found it to be 
strikingly accurate.  I have also done some calculations by hand on paper 
which tend to agree with the machine assisted calculations.  I don't know 
about the 1000 some odd lurkers on the TCML, but most of the active members 
are doing real science here.  I don't really see how your lemmings analogy 
fits in.

Maybe I can get lucky and be successful in explaining what others on the 
list have tried an failed, attempting to get through to you.  The 
"consensus" on the list that seems to bother you has come (especially over 
the last 5 years) in large part from painstakingly tedious emperical 
research from experienced coilers....many of whom have significant 
knowledge of engineering and physics.  No one is expecting you to take 
anything on "faith".  All the emperical data you could ask for is here in 
the archives and all the experience in the world is waiting for anyone who 
is willing to stop yakking and actually do some coiling.  It's not that I'm 
trying to sound abrasive here, but it seems like a few times you've 
complained about the list for some reason.  I'm going to call you on it 
since I've been reading this list for over 5 years and have had the 
priveledge of witnessing some of the greatest minds amateur science has 
ever hosted.

-Brett

hot-streamer-dot-com/brett


 >Luke Galyan
 >Bluu-at-cox-dot-net
<SNIP>