Most ESC have a LVC Low, Voltage, Cuttout, that can be programed, if your plane went to full throttle, thats was more than likely a brown out, the receiver quit working for a few seconds, that problem may have been caused by the transmitter signal being weak, or by the BEC in the ESC getting hot, and not delivering voltage to the receiver or low voltage, a UBEC is a external bec to provide power to the receiver and servos and ESC, and is seperate of the ESC, the Eflite ESC has a linear bec in it, the newer ones have a switching bec, much better, if you have the older linear bec in the ESC, that very well may be the problem, and a UBEC will correct that, here is a great ubec from Castle Creations, its cheap insurance, Take care, Chellie
PS, the original red wire in the ESC, that goes to the receiver is removed to use the UBEC, if your receiver has only 4 channels, then you will need to use a y connector in the throttle port of the receiver to power the receiver and servos.
http://www.castlecreations.com/products/cc_bec.html
http://www.wattflyer.com/forums/show...&highlight=bec
http://www.wattflyer.com/forums/showthread.php?t=39138