When you use glow power or gasoline in you RC model plane you are restricted as to making power changes.
On those systems you can do a little with propeller changes, but that is about it.
With electric power in your RC model plane you have any number of choices even after you have installed the power system.
of course you are going to need some equipment such as a watt meter.
The maximum load for a motor or battery is the wattage it can take.
You can add another li-poly cel by simply plugging in 3-cell pack in place of a 2-cell pack.
This adds more voltage and of course more power.
Please be careful when doing this.
It is best that you should get a Watt Meter so you can tes as you go along and prevent damage to your RC equipment Of course you must check the wattage when you do this, but the increase in voltage will be partially off set by the lowering of the amperage that is now going to the motor.
There will be an increase in rpm and power and thrust and all the good stuff.
Now you can play with propeller size to see how close you can et to the most efficient use of the motor.
You need to know the KV of the motor; this is the rpm per volt with no load.
A KV of 850 means the motor will turn 850 rpm for each volt applied with no load.
A 2-cel li-poly has a nominal rating of 7.
4 volts.
This will give you 6120 rpm.
Good cub speed on the prop, but as you realise as you load the motor with the prop this speed comes down.
Now we move to 3 cells, now up to 11.
2 volts and 9520 rpm.
if you are flying a cub you can increase the size of the prop to take advantage of the extra power..
Now you have the idea; you can vary the voltage ( cell count),amperage draw (propeller size), to get the maximum efficiency and power from your system.
Some people seem to believe that you must pick one power system and only use that on.
This is not true, I have electric, gasoline and nitro powered airplanes.
the key is to use the power system that is most suitable for the RC airplane..
That having been said you can power any RC plane that is currently available with electric power.
On those systems you can do a little with propeller changes, but that is about it.
With electric power in your RC model plane you have any number of choices even after you have installed the power system.
of course you are going to need some equipment such as a watt meter.
The maximum load for a motor or battery is the wattage it can take.
You can add another li-poly cel by simply plugging in 3-cell pack in place of a 2-cell pack.
This adds more voltage and of course more power.
Please be careful when doing this.
It is best that you should get a Watt Meter so you can tes as you go along and prevent damage to your RC equipment Of course you must check the wattage when you do this, but the increase in voltage will be partially off set by the lowering of the amperage that is now going to the motor.
There will be an increase in rpm and power and thrust and all the good stuff.
Now you can play with propeller size to see how close you can et to the most efficient use of the motor.
You need to know the KV of the motor; this is the rpm per volt with no load.
A KV of 850 means the motor will turn 850 rpm for each volt applied with no load.
A 2-cel li-poly has a nominal rating of 7.
4 volts.
This will give you 6120 rpm.
Good cub speed on the prop, but as you realise as you load the motor with the prop this speed comes down.
Now we move to 3 cells, now up to 11.
2 volts and 9520 rpm.
if you are flying a cub you can increase the size of the prop to take advantage of the extra power..
Now you have the idea; you can vary the voltage ( cell count),amperage draw (propeller size), to get the maximum efficiency and power from your system.
Some people seem to believe that you must pick one power system and only use that on.
This is not true, I have electric, gasoline and nitro powered airplanes.
the key is to use the power system that is most suitable for the RC airplane..
That having been said you can power any RC plane that is currently available with electric power.
Source...