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Try the aeroelectric connection web site. (don't have the link handy or I'd include it.)
A much more effective (& cheaper) indicator is to measure voltage between the + terminal stud of the starter & the ground post of the battery while cranking the engine, then between the + & - battery posts while cranking. If there is a significant difference in the measurements, then there is a high resistance somewhere in the path from battery to starter. If that pair looks good, measure between the case of the starter & the - battery post. If you see any voltage at all there, there's a problem in the ground return to the battery.
The problem with using 'enhanced' low resistance ohm meters is that the resistance where the probes touch the circuit can be a significant % of the measured resistance. If you put the circuit under a high current load like cranking, you'll see significant voltage *drop* at the starter + or significant *voltage* at the starter - if the problem is in the return.
I doubt the above makes much sense but I'm typing in a hurry while packing to leave on vacation & my wife is questioning my priorities.
Charlie
Bob Perkinson wrote:
Some place in the archives of this list or the Matronics list is a diagram
on how to make a simple reliable and fairly cheep ground tester that will
test how well the ground paths will function.
(looking but not finding at the moment)
Bob Perkinson
Hendersonville, TN.
RV9A N658RP Reserved
If nothing changes
Nothing changes
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
Behalf Of Dale Rogers
Sent: Wednesday, August 03, 2005 11:51 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Leaking fuel hose
John,
What is a "weak" ground?
Any high-resisitance connection (including too small a
cross-section for the current being passed) will encourage
current to flow through another, lower resistance, path.
Gotta wonder why that particular spot got hot, though.
Seems like the heat would be distributed along the entire
braid.
Dale R.
[notice you got more responses here than on the CAF? ;) ]
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