ORIGINAL: feihu-RCU
ORIGINAL: Primodus
How does the nicad not throw too many volts into the plug and burn it out like mine does? Is it all dependent on the gauge of the wire?
A single nicad does not put out more than 1.2 volts. There are "hot" plugs and "cold" plugs, and some light up at 2 amps where others light up at 4 amps, and without on board glow, some fail due to overheat and/or vibration. I understand that some 2 cycle engines really run hot.
AWG 20 wire gauge is adequate to conduct up to 5 amps; thinner wire has more resistance and could cause the plug to NOT light up.
My post above is from my experience. I have tried on board glow with throttle operated switch and servo operated switch, but those are different stories.
I would be interested in your problem for my information, and would be glad to offer help if I can. I would like to know what brand engine and size, what brand/type glow plug, and % nitro in fuel.
feihu
I'd be willing to debate the statement about "single nicad does not put out more than 1.2 volts". A fully charged nicad, at least the ones I am using (Sanyo) will charge to about 1.44 volts before my peak detecting charger shuts off. 1.2 is the nominal voltage, and once the battery is discharged to that point, should be recharged, or it is likely to have insufficient voltage to reliably drive enough current to operate whatever is hooked to it, unless the system resistance is extremely low, and that is a function of more factors than just the conductive resistance of the wiring.