Specifications

1 = number of winds or turns, the fewer there are, the faster the motor is (higher kv rating
(rpms/volt)). This also means the motor will draw more current, so beware.
Y = type of wind. Motors are either Wye or Delta wound. Wye wound motors generate 1.73 times
more torque than their Delta equivalent, but are also 1.73 times slower (1515 1 y = 2200kv,
1515 1 d = 4100kv).
Longer motors will generate more torque in general, as will larger diameter ones. Feigao type
motors are easiest to understand as they are generally sold as S, L an XL sized cans; anything
with a diameter of 36mm being what you are after for MT use. Neu motors however have an
advantage as they have 4 poles, vs 2 on the Feigaos. This important as a 4 pole motor will
generate almost twice as much torque, all other things being equal. KV is a term you will see
used often, and it refers to the number of RPMs per volt that a motor will spin; the higher the kv
rating, the faster it will spin, but the more current it will draw too.
Why is a Feigao so cheap compared to most other motors?
Feigaos are cheap Chinese copies of Hacker motors. They are both 2 pole motors, but the quality
and efficiency is much higher in the German made motors, as is true of the American made Neus
and Medusas. Though the power output is more than adequate, the temperature and magnet
issues are an unfortunate side effect; you must watch your gearing far more closely with the
lesser motors than with the much more flexible and cool running better quality brands. As an
entry level motor, they are a good place to start however if you are unsure what setup you are
after, but don’t be fooled into thinking exotic water cooling solutions are the answer to keep a
motor cool- that works in boats, not in trucks. A fan is much more simple, but often just masks
the true problem, which is often a poor motor, bad gearing or poor overall setup choices.
What voltage should I use with this motor?
Although often argued about, I have a very simple set of basic guidelines that can be used as a
general guideline for choosing which voltage to run any given motor on:
1900-2700kv = 4s lipo
1700-2000kv = 5s lipo
1500-1900kv = 6s lipo
Guidelines only. You can quite happily run a 2200kv motor on 5 or 6s lipo, but unless you gear
down you will have a road missile. This sounds fun, but an uncontrollably fast truck can be quite
dangerous, trust me; for speed runs only usually. I personally use a 2000kv motor on 5s lipo,
and many others use the 2200kv Neus on 4s lipo. There is much potential for debate, but if you
want a powerful setup that also runs fairly cool, then the 1900-2200kv range is best for 4-5s lipo.
A high kv motor like the 1515 1.5d (2700kv) is best used only for 4s lipo, and a low kv item like
the 1515 2.5d for 6s lipo. Since most easily available escs are 4-6s lipo, this should help make
the decision easier, but as always, reading around and researching will yield far more info to aid
you.
Why is high voltage better than low voltage?
There is a very simple equation:
Power (watts) = volts x amps
An MT requires a certain amount of power in order to move at a desired speed with a certain
amount of torque. In order to generate that power level, you either require more amps and less
volts, or more volts and less amps. Since current draw is one of the limiting factors with most if
not all batteries and escs (not to mention wires and plugs), it is most wise to use a setup that
draws less current and therefore more voltage. Obviously there is also a limit to the voltage you
can use, but by simply choosing a 6s lipo setup and a slower, less amp hungry motor, rather than
a 4s setup, you can make considerable improvements to your temps, runtimes and improve the
lifetime of your equipment; repeatedly heating up electronic components will eventually kill them,