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G6KUI > TECHNI 20.08.04 17:27l 62 Lines 2593 Bytes #999 (0) @ WW
BID : 77567-G6KUI
Read: GUEST OE7FMI
Subj: Re: Re^2: More Battery Confusion.
Path: DB0FHN<DB0RGB<DB0AAB<F6KFT<LX0PAC<ON0LGE<ON0BEL<7M3TJZ<ZL2TZE<GB7YFS<
GB7MAX<GB7DBY<GB7DBY
Sent: 040820/1313z @:GB7DBY.#23.GBR.EU NPF2.54c [G6KUI PMS Alvaston Derby]
Andy GM7HUD wrote about Jeff G4XNH......
}
} Sadly the safety notice printed in every car owners manual I've seen for
} alternator equipped cars had no effect. "Do not disconnect the battery with
} the engine running or serious damage may occur to the charging system."
}
} > Perhaps someone who is interested enough has the specs for an old "common"
} > alternator to compare with a modern one? I believe that the car concerned
} > was an Austin Maxi 1800cc although the precise year is now forgotten.
}
} LUCAS 16ACR34A current at 6000rpm
}
} That's 6000rpm of the alternator not engine. Expect 2 to 3 times less revs
} on the engine due to the pulleys.
}
} More than enough to power a car of the period which would have as standard
} 2x 55/60W headlamps (dip/beam) 2x 5W parking lamps, 2x 5W rear lamps,
} 2x 20W brakelamps, 4x 20W indicator lamps, 10W dash illumination, 5W
} interior light, 80W? fan. 5W number plate lamp.
}
The Lucas 16ACR alternator was also fitted to the "Mini" of the same vintage.
The warning notice about *NOT* disconnecting the battery is in all the
handbooks of that era.
I would just like to comment on the Austin Maxi, There were TWO engine
sizes 1500 and 1750. Austin also did an "Austin 1800" which was an entirely
different car. If I remember correctly the Maxi had a K series engine.
I had a Maxi 1500, it had a very high compression engine and needed 100+
octane fuel. I had mine in 1973/4 and 100 octane fuel was fairly scarce
then and soon after almost disapeared from the forcourts.
I had great fun with my 1500-Maxi, after a few mods it proved a very fast
and well suited Rally Car - the only problem was that it was a little too
long to fit through a bridge sideways ! :-((( --- end of my Rallying days.
In it's modified form it never returned more than 25mpg and if really
pushed fuel consumption was well down in single figures. But fuel was cheap
in those days.
Those were the days with no national speed limit where you could legally do
120+m.p.h. on public roads.
Also I had motor rally comprehensive insurance cover at no extra cost,
something almost unheard of today.
Back to the alternator on the Maxi, mine always had the standard one fitted
and it coped admirally with the much increased electrical loading that I
put upon it. Double the headlamp wattage plus further auxillary driving
lights must have pushed the load very close to the 34amps limit of the 16ACR
but never any problems ( most of my rallying was at night-time when all the
lights were on for most of that time ).
73, Pete G6KUI
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