"Depending on the resistance that drop may be unacceptable and you risk "brownout".
Can we honestly say...with todays power supply providing 6.6V 5000mAh or 7.4 lipo @5000mAh, should we still worry about "brownouts" I seriously doubt anybody using 4.8V @ 1500mAh battery's nowadays...unless Spektrum using 5v microcontroller in the receivers lol. Another thing... jet's don't use that much amps (I think) to suffer any "brownout" more like 100CC 3D planes doing full aileron deflection for 4min harrier rolls.
I wish all brand receivers would have a built-in led signal strength meter.
Just my opinion.