Running twins? Help!

[hex-dj]

I will like to know if when you are running twin ESCs and one reciever. Do you have to disconnect the BEC from one of them or you just simply leave the twin ESC s plugged into the same reciever as you would do when running normaly one ESC and one reciever. And...When you run twin motors does it mean that if for example I have two 2300 kv motors ..Does it mean that I am running on say 4600 kvs for one cat for example? I f I have one 12 cell pack per ESC...Does it mean that Iam doing like 29-30 volts with two ESC s or just the 14.4 volts one ESC is supposed to do with 12 cells? HELP/TIPS will be appreciated...

[G Doggett]

I presume you are using a Y harness to connect both ESCs to your receiver, in which case if it is a BEC set up leave both of the red wires connected.
The supplied voltage will still be the same you have simply doubled the available ampage.
Two 7.4 batteries in parallel are still 7.4 volts.
Does that make sense ?
Graham.

[hex-dj]

Yes it does G Doggett .Thanks.

[G Doggett]

Aaah now twin motors, that gets a bit more tricky.
The KV rating for a brushless motor has nothing to do with its power output, it is just the rpm per volt that it will spin at.
The power is how many watts it can produce from the supply voltage times the maximum rated ampage for that motor.
In your example the 12 cells are supplying 14.4 volts to each motor, so thats the maximum voltage you have on board, but each motor will produce maybe 720 watts if they can handle 50 amps each ( eg Ammo 2300 ).
So the total power is 1440 watts.
However that doesn't mean it will go twice as fast as the same boat with only one 720 watt motor.
The Law of Diminished Returns takes over here unfortunately.
In fact it gets worse, one motor and prop producing 1440 watts will probably go faster than two 720 motors and props.
I have set up a Jolly Motor with twin Ammo 2300 motors and twin drives because it looks cool and because I wanted to.
A single motor with less than 1400 watts of power will probably beat it, but I don't care.
Graham.

[hex-dj]

Suggestions on prop. counter rotation...Anyone?

How can I make my props. turn in a counter rotation one clockwise the otherone counterclockwise using two Ammo 2300 and two Pro Boat 21v ESCs with a DSM Radio? Left and right props.?

[ChaKane]

Just change the drive wiring around for the one that you want to rotate in the counter direction.

[ChaKane]

You wil of course need a counter rotating prop or you won't be going anywhere at any great rate of knots