rc_square24

iTrader: (9)

how does the thickness of the wire make a difference?
and..does 12 gauge wire fit in the lrp qc?

thanks

Cole Trickle

In general, the thicker the wire, the lower the resistance in the wire. To keep the resistance low, it's better with many thin cores, than one thick.

As for the QC, I dont know.

rc_square24

iTrader: (9)

so you mean 12 gauge will be better than 14? but will the it affect the battery runtime?

disaster999

iTrader: (1)

the difference is so small that it wont even matter! millionth of a ohm resistance difference is not noticable!

i run 16 gague wire on my 12th and theres no difference, i preformed better too

Tek Nickal

Low currents with thick wire = more resistance, vice versa for thinner wire. We're not dealing with 100000w, so 10 - 18 gauge is fine for whatever.

Cole Trickle

No, it's the opposite, 14 is better than 12 !!!! But as somebody else said, you probably cant feel the difference. Good connectors are more important.

TSR6

iTrader: (5)

Would you rather pump 100 gallons of water through a garden hose, or a 6" PVC pipe?

Thicker = less resistance. Bigger the pipe, the easier it flows.

petzl

14 is better than 12??????????


Cole, in AWG (american wire guage) the lower the number, the bigger the wire.


check out this url.

http://www.stealth316.com/2-wire-resistance.htm

It will calculate using ohm's law the voltage drop for all the common wire guages at various wire lengths and amp draws.

Using a smaller wire will kill punch and top end.

Cole Trickle

Obviously, I'm not a american. Thanks for correcting me.

Cole Trickle

Nice. It also shows, that the shorter the better - but to some extend. A few extra centimeters doesnt matter....

So: Use a reasonably wire, pay attention to the soldering and to connectors.

Cole Trickle

So the thickest wire in the US, is 0 AWG - or do you guys use negative numbers as well????

Speedie

You will never tell the difference if you use 12 14 or 16 gage wire in your car. The smaller wire will not make a difference in what we do. The difference you are thinking you can feel is a thousandth and sometimes ten thousandths of an ohm. Very few meters can measure that so I dont think a human can feel it in his RC car. Any of these 3 sizes would work equally well. The only time it really matters is on a 12th scale car where the wire size affects the motion of the rear pod. I use 16g on my 12th scale for that reason and 12g on the TC just cuz its cheaper and more easy to find.

petzl

neglect other variables like non linearity in the motor, driver skills etc. the speed loss due to voltage drop is as follows


14 vs 12g -----------.051s/lap
16 vs 14g ------------.081s/lap
18 vs 16g -----------.128s/lap

These numbers are calculated at 1.17v per cell and 10s avg lap time. As the voltage drops, the speed loss gets bigger. Of course there are a million other variables that affect speed. Any one of them could drastically affect these numbers. I have also overly simplified the calculation by assuming that the percent loss is consistant regardless of acceleration and braking.

It would be interesting to see a really good driver collect data on actual lap times vs gauge.

Cole Trickle

Nice work!

By the way, you shouldnt be an engineer ?

petzl

Actually I took a job as an environmental chemist 7 mos ago so, technically i am not an engineer anymore

had to switch gears for a bit.