Gryphon

Campy,

CC Phoenix ESC from 35A to 125A are not rated for 4S as far as the BEC chip goes.
The BEC means battery eliminator circuit.
BEC is a small chip on the ESC that feeds 4.8-5V juice to the receiver and servos.

Your 80A ESC is rated for up to 6 cell lipoly, but at 4 cell lipoly you need to run an external BEC for about $25-$35 depending on the amp rating needed for number of servos used.

At the same time you need to disable your CC80 red wire that goes to receiver so it does not give 5V to receiver anymore, because that is being done by the new Universal BEC "UBEC"

**** Instead of UBEC you can run a separate 4.8V flight pack just like in Fuel/GAS planes/cars/helis.

You can disconnect the red wire in several ways.

1) run a OPTO Isolator for $16
2) cut the red wire and tape it on both ends
3) remove the red wire from the connector and tape it.
4) to avoid messing with the red ESC wire and buying OPTO Isolator, connect a short servo wire extension and do either step 2 or 3 above to the extension wire.

Note: some of the UBEC that are available come with a secondary output that is useful...just read your manual.

Brand names for UBEC: Medusa Research is one such unit.

Make sure to install UBEC as far from the receiver as possible, less of an interference issue if a Spektrum radio at 2.4 GHz is being used.

Feel free to contact Castle Creations to discuss this subject.

Since you are at it, you can get the UBEC at 5V or higher 6V. The 6V units make the servos work faster and be stronger. I run 6V in all of my planes. Electric or Fuel powered.

Hope you find the above useful.

Gryphon