RE: Bang Size

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

Original poster: "Luke" <Bluu-at-cox-dot-net> 

Thanx.
I understand the joule thing a bit better now I got a definition last
night and applying that to what you just said makes sense

I was wondering what is said to be the value used for the losses in
joules through a spark gap static and rotary.

I know there is no way to give an exact number.
Just the nature of what they are has way too many variables to pin down
with out studying the exact gap in question.  Was hoping in this case
there were a couple rules of thumb.

Luke Galyan
Bluu-at-cox-dot-net

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Saturday, January 17, 2004 7:27 AM
To: tesla-at-pupman-dot-com
Subject: Re: Bang Size

Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>

Bang size is the energy in each firing of the spark gap. With a static
gap,
set fairly far apart, you'll get one firing per half cycle of the line
frequency (i.e. 120 bangs/second in the U.S.).  With rotary gaps, with a
traiggered gap, or with a static gap set closer, you can get multiple
gap
firings per half cycle.
The energy, in Joules (aka WattSeconds) per bang averages the input
power
divided by the bang frequency (bps - breaks per second, bangs per
second),
so... 360W into the system: 60Hz power: 120 bps -> 3 Joules/bang.

A CW coil (tube or solid state) is continuous and has no "bang",
although a
cw coil run in "staccato" mode is pulsed, creating an effect similar to
the
bangs of a spark gap coil.

The actual HV pulse from any one spark gap firing (bang) lasts only a
few
tens or hundreds of microseconds, so the peak power is quite high (3
Joules
dissipated in 100 microseconds is 30kW)

There's sort of a tradeoff between lots of small bangs and relatively
fewer
large bangs.  The relation between bang energy/rate and spark growth is
subject to a lot of discussions, and the archives are full of them.


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, January 16, 2004 5:16 PM
Subject: Bang Size


  > Original poster: "Luke" <Bluu-at-cox-dot-net>
  >
  > What exactly is meant by BANG SIZE?
  > I see it referred to as being separate from arc length.
  > Someone care to fill me in?
  >
  > Luke Galyan
  > Bluu-at-cox-dot-net
  >
  >
  >