The larger the propeller s diameter and pitch the more current the rc electric motor will draw for a given rpm.
Electric rc plane motor guide.
For example when powered by an 11 1 volt battery a motor with a kv rating of 860 will produce a no load rpm of 9546.
The motor above runs at 1400 kv.
1 10 4 pole esc brushless motor combo 3000kv.
When choosing a motor there are two basic things you need to look for.
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The kv rating gives you the no load rpm that you can expect per volt of current.
In this example 50mm 55 the second two numbers represent the length of the.
Drawing too much current will destroy the motor.
Park 480 brushless outrunner motor 910kv.
This is why you need a speed controller to convert the battery s dc power into ac.
50 55 3000 50 the first two numbers represent the diameter of the motor s housing in millimeters.
For example the 200kv motor will run at 2400 rpm s regardless of whether it has a 10x6 prop or a 11x5 prop.
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Let s assume we have a 5055 3000kv brushless outrunner motor.
Electric motor power is stated in watts.
We break the numbers out as follows.
The chart below also lists the roughly comparable glow and gasoline power systems for reference.
An easy way to estimate power needs for rc hobby applications is to use 100 watts per pound for sport flying 150 for aggressive aerobatics 200 watts per pound for 3d flying.
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Any load on the motor such as a prop will reduce this number.
Brushless motors use a standard numbering scheme to describe their physical size and kv rating.
These numbers should be used as a guide when picking out motors.
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