----- Original Message -----
From: "chance wolf" <timberwolf@wheeldog.net>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Saturday, November 11, 2000 7:21 PM
Subject: Re: [MV] CUCV Golw plugs
>
> ----- Original Message -----
> From: "Emmett Thompson" <kt4al@worldnet.att.net>
> To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
> Sent: Saturday, November 11, 2000 10:13 AM
> Subject: [MV] CUCV Golw plugs
>
>
> > and connect directly to the 12 volt buss. I took the resistor off and
put
> my
> > ohm meter across the resistors and found them to be almost a direct
short,
> > only 0.8 ohms. The glow plugs were getting very close to 24 volts!
>
> Not really. V = I x R, where V is the supply voltage expressed in Volts;
I
> the current value expressed in Amps, and R the resistance value expressed
in
> Ohms.
>
Yes, but; V is the voltage across R when I current flows through it.
>Therefore: 24 = I x .08, or more solvably, 24 / .08 = I, and I
> works out to be some 30 amps.
>
Bit crossed up here, the original post stated 0.8 ohm not 0.08, the sum
above gives 300A as written. Also the whole of the 24V supply is not
dropped across the resistor as the glow-plugs have a resistance too, which
is why they get hot. You have effectively two resistors in series with
voltage across each.
>My manual states the nominal total CUCV
> glow-plug load as around 35A,
>
Therefore the voltage across the 0.8 ohm resistor is 35 x 0.8 which is 28V
and this obviously cannot be correct.
Richard
Southampton - England
This archive was generated by hypermail 2b29 : Sun Dec 03 2000 - 20:29:50 PST