Re: Weird ideas
From: Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: Monday, December 08, 1997 11:54 PM
To: Tesla List
Subject: Re: Weird ideas
> From: John H. Couture[SMTP:couturejh-at-worldnet.att-dot-net]
> Sent: Monday, December 08, 1997 2:25 AM
> To: Tesla List
> Subject: Re: Weird ideas
> At 05:27 AM 12/7/97 +0000, you wrote:
> >From: Mark S Graalman[SMTP:wb8jkr-at-juno-dot-com]
> >Sent: Saturday, December 06, 1997 8:11 AM
> >To: tesla-at-pupman-dot-com
> >Subject: Re: Weird ideas
> > Adam, you misunderstood my meaning. For
> >instance a car standing still with the engine
> >running is operating at ZERO efficiency.
> >Unless of course you're comparing idling
> >Mark Graalman TCBA #1399
> Mark -
> A car standing still with the engine running is NOT operating at zero
> efficiency. This is because energy is being consumed in overcoming friction
> in the engine, etc.
> Zero efficiency has no meaning in engineering. Zero efficiency could imply
> perpetual motion. Why?
> Efficiency = output / input = 0 ?
> Input = output / 0 ? meaningless
> The energy output would be the losses in the engine when the car is
> standing still with the engine running. However, work done (force x
> distance) would be zero.
> Efficiency = work done + losses / input
> Efficiency = 0 + losses / input = losses / input
> The efficiency might be higher when the car is standing still than when
> moving. The losses standing still are low but so is the input.
> The efficiency of a Tesla coil might be higher without secondary sparks than
> with sparks. However, this probably is not possible because of the losses in
> the primary spark gap.
> In fact to determine the efficiency of a Tesla coil when no secondary
> sparks are present would be an interesting test. Does anyone have any
> John Couture
I have already posted a very simple way of measuring pri-sec transfer
efficiency that is quite accurate. It is in the archives. You must
monitor the secondary ringups with a scope and put a large enough
topload on to prevent breakout. Do this in single shot mode as
anything else will hammer the cap/s to pieces.