Please don't hit me if this has been asked in some other forms elsewhere... But I can't seem to find it.
The question I have is how would I tell some things about RC planes power packages (for SERVOS not props) to know when I need to take additional steps?
EX: Prior to recently - All my planes were foamy ARFs / PNFs. Either the standard $2 9 gram servo, micro servos, or pre-packaged with the plane.
So for say a foam Micro - 1S with 4xLinear servos is fine...
As you go to 2S and larger planes, 20-30" span, you tiptoe into 9 gram land. (2S and as many as 6 9 grams I have had work fine.)
Then you get into larger park flyers. 3S, 4S come into play and you still use the ESC / BEC and I have used up to 17 gram servos here....
As you get bigger or stronger servos, there are as I understand dangers of:
* Brown outs - where you temporarily kill your receiver.
* Hangs and unexpected issues there.
* Also as you step up above X voltage, you can't rely on a BEC to step it down and could fry your "brain" mid-flight.
All that I know and understand, but what are the rules of engagement here? What drives those decisions on middle of the road (say 6S setups where there are BECs that do fine?)
How would I figure out that say my 4 digital servos will be ok with a 3 Amp BEC, but adding one more would cause me to need a larger one? Or how would I know if there would be enough power from any given BEC for the radio, and servos?
Lastly - Say I added a separate battery for the radio and it was 2S 1000 mah, how would I know how long that would last for? (without finding out the hard way?)