Originally Posted by
HarryC
I am running 5 powerful digital servos from the Cortex and that issue of getting current through just 2 leads does concern me a bit, as 4 of them are elevons which will all be worked at the same time so maximising the current drawn. However I can't see how you get a battery input on its own into the Cortex, could you explain please? The only spare socket is for the USB connection.
Harry,
I asked the same question when I first put a Cortex in my big Futura. Here is the reply from one of the Cortex reps in another RCU thread:
"G
ood question..
the small colored gauge wires are just signal wires.. there has been a lot of discussion about that for bigger jets.. what you can do is this..
The system harness has 2 red/white/black heavy gauge servo wires that power the bus and servos..
Options..
1. Add a servo wire with the signal wire pulled to the Bind port from any power source.(after it its set up and functioning) for more power
2. Add a Y cord downstream to any of the servo wires from any Power source, and it will add to power available for all the 5 ports..
3. If you are using a matchbox downstream (twin rudders), add a power source into one of the numbered ports and it will also back power and add to power available.."
FWIW, like you, I have just been using the two powered leads and have not had any problems.
Tony, to answer your question; the Cortex only passes power through 2 of the servo connections (just the signal wire through the others), whereas the 3E passes power through all the servo leads. I'm thinking that your giant warbird may put more of a load on the servos than some of our jets and you may want to augment the power if you go with the Cortex.