Thank you, Ferg. If you visit that address, you'll find that their main
server
is temporarily out of service.
Shaun
----- Original Message -----
From: "Fergus Kyle" <VE3LVO@rac.ca>
Subject: Re: Bundling of coax cables
> Tom: et al
> try http://209.134.106.21
> for the moment.......
> Ferg
>
> ----- Original Message -----
> From: "Tom & Cathy Friedland" <tfriedland@attbi.com>
> Subject: Re: Bundling of coax cables
>
>
> > Tony
> >
> > You have recommended Bob's www.aeroelectric.com recently. I am not able
> to
> > get into his web site any longer. Do you know if he is still in
business?
> > I have his book and it probably has a phone number in it. I can try
> > phoning.
> >
> > Tom Friedland
> >
> > "Tony S. Krzyzewski" wrote:
> >
> > > So a "negative" bus bar, with about a dozen connections, should be
> > > thrown and replaced with a single point connection for all the
"circuit"
> > > return wires ,as well as a single point connection for the "grounding
"
> > > wires? (Just convince me please that circuit negative wires are the
same
> > > or different to "ground" wires?) Regards Bob
> > >
> > > A negative bus bar is a single point ground if all of your
> > > ground/negative wires terminate on the bar. If all your wiring
> > > terminates on this single bus bar then you have the best form of
ground
> > > return other than terminating all of the wires at the battery.
> > >
> > > The key is to have all the circuit return wires terminate at as few
> > > (preferably one) point on the aircraft and to have minimal resistance
> > > (read big fat wire)to the current source return (battery). This single
> > > point can be a bus bar, a bolt or a plate with connectors. The point
> > > here is that the resistance between the individual return line
> > > termination points should be very, very low and a block of brass bus
bar
> > > does this very nicely.
> > >
> > > Circuit negative wires are the same as ground wires which are the same
> > > as return wires.
> > >
> > > On a tin can aircraft the skin and structure effectively can act as a
> > > very large single point ground with the return current flowing over
the
> > > entire skin. As it's a massive area electrically the current flow per
sq
> > > cm is miniscule. Composite aircraft don't have the luxury of having
this
> > > cheap return path so we have to build an individual return path for
each
> > > and every circuit. Unfortunately electricity has the habit of finding
> > > the easiest path to ground and, if the returns form multiple paths to
> > > grounds and there is a variation in resistance of those return lines,
> > > then voltage differences can be induced between the ground points as
the
> > > current flows between them. Bringing all return lines to a single
point
> > > and ensuring that the single point has a low resistance to the
aircraft
> > > true ground point removes the problem.
> > >
> > > I have built several large computer controlled model railway systems
> > > over the years which have amazing parallels to wiring the aircraft.
> > > Failure to bring the grounds back to a single point in those systems
can
> > > induce so much electrical noise that the microelectronics simply fails
> > > to work.
> > >
> > > Tony
> > >
> > > The Europa Forum is supported by Aviators Network UK
<info@avnet.co.uk>
> >
> >
>
>
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