9volts are faster

[banzaimf]

I think Animal has nailed it.

optimal paddle rpm.

Faster is not necessarily better. As far as the wiring on the 12v. The batteries are wired in parallel to give them a total of 18 volts which then goes through a resistor to drop it to 12 volts spinning a 9 volt motor. This lets the motor spin faster but not burn it out too quickly.

I should take my 12 and my old 9 apart and start playing with them.

banzaimf

[[NA]WARLORD]

Angel Seed, a word of advice, try punctuation in your sentences (like periods& commas) it helps get your point across better. It also helps with headaches, trying to decifir your run-on sentences.