ORIGINAL: darkith
Sorry Splat, you shouldn't use a lower voltage ESC on a higher voltage supply. They do have limits where things will burn out, even if the motors aren't plugged in! (capacitors have voltage ratings, the BEC circuit has to dissipate more volts and overheats, ICs get too much voltage, etc).
You may be able to get away with a bit of over-voltage, but it's not a good idea, especially in helis! Stick to the voltage and current ratings.
I will say that I hate the trend of car/truck ESCs rating current handling in "turns". ***?
D.
In a good design, the caps should be rated close to twice the working voltage that they are likely to see.
The IC's are linears and should stand a little overvoltage without exhibiting any problems, but I'll give you that one.
The BEC,,, Oops, yup, shunting more volts (and don't forget that means current) means more heat. heat is a BAD thing! Ya got me Darkith! I stand corrected. Your logic is impecable, resistance is futile........ (thanks Dark. I said I could be all wet).
Richard,
Please disregard previous. I am all wet and, if heeded, am likely to be the cause of one of your fantasticly sculpted and painted wonder tanks ending up a flaming puddle of plastic...... Sorry
Splat