4-Max Brushless Motors
Notes on Selecting a Motor
As with all things, it's best not to run motors right
on their limit especially if there is limited cooling. As a rule
of thumb if you need 400W then chose a motor with 20% extra
capacity i.e. around 500W.
If a motor doesn't start immediately you must cut power immediately,
or you will destroy the motor and/or ESC and/or battery within a
second or two and it really can be that quick.
A brushless motor is actually a 3 phase AC motor. If the motor rocks
back and forth but does not rotate, this means there is a problem
with one of the phases and as mentioned before the power must be
cut immediately or you will burn the Motor/ESC/Battery out with
a second or two.
The main cause for this problem is a poor or dry solder joint on
one of the wires and/or connectors between the ESC and motor.
Re-solder these wires/connectors with fresh
leaded solder (lead free solder is rubbish and causes many problems)
make sure the wires are well tinned and very hot.
Do not ground run any electric power system for more then 20-30 seconds
or you stand the chance of burning out the motor and or ESC.
All props MUST be balanced before being used on an
electric motor. An out of balance prop will cause vibration, loss
of RPM/power and increased current draw as well as reducing the
life of the bearings in the motor. In the worst cases will cause
the shaft to break almost instantly especially so in foam models.
Please clike here on how to fully balance a 2 bladed