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Re: L-IVP Battery Cooling
The Bob Nuckolls wisdom on this is that some
voltage drop is okay for a starting system.
I'm only repeating that not endorsing
it.
(Caveat, if you have a full feathering prop and
would like to air restart after feathering, it takes 20-30 seconds of
vigorous
cranking under nasty cold conditions to get it out
of feather. Voltage, and cold cranking amps helpful
here)
That doesn't worry me nearly so much as high
current unprotected wires in the cockpit, at least when not in starting
mode.
----- Original Message -----
Sent: Wednesday, November 04, 2009 6:40
AM
Subject: Re: L-IVP Battery Cooling
Also, a remote location causes more voltage drop due to the longer
cable. I have one battery in the back and tried copper wire (very heavy)
and had almost no voltage drop, but when I checked aluminum wires (very
light), I had nearly 1.0v drop from the terminals to the Buss. Aluminum
is OK for avionics Buss, but not cranking or hydralic pump amp (too much heat
and volt loss), if drawing off a battery behind the rear bulkhead. My
humble opinion.
Voltage drop per foot is part of the specification of the cable wire
guage and material.
Jeff L
LIVP
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