Resistance and its effects

Resistance and Power Loss

The chart below will help to explain why the use of high quality components is so important when you are in a high AMP drawing setup.  If you are only pulling 5 to 10 amps this is less important but still useful information.

As you can see, the voltage supplied to the motor goes way down (as will your speed, torque and power) when using some of the typical components found in RC.  When you upgrade to better components and wire the voltage loss is a lot less.

Wire Resistance and Strands

High strand wire is used for flexibility, and the Deans wet noodle wire is well, like a wet noodle, same resistance as lower strand equal gauge wire but more flexible. If you want lower resistance use lower AWG wire.

One other reason to use high stranded wire has to do with its ability to carry high frequency signals with lower resistance. This is why we use it for speaker wire, ahh the fidelity, and not solid core wire like in your house. 

I’ve been told that in general all AC current acts in this same way .... it also sees stranded wire as a lower resistance.  The explanation has to do with the AC current traveling on the wire surface in these applications (skin effects).   At the low frequencies we are talking about (3 kHz typical) there is no difference, at least none that can be measured.  Especially since your motor is acting like a big variable inductor, working to maintain a DC current in the wires.

Although at 10kHz, stranded wire DOES make a difference for the audio folks, most "trained ears" are unable to differentiate wire, speaker, and such after a certain quality level is reached.