# What do the numbers mean on drone motors?

Contents

Brushless motors are typically categorized by a four-digit number – such as **##. where as the “**” numbers are the stator width and “##” is the stator height. Essentially, the wider and taller the motor is, the larger the numbers are and the more torque it can produce.

## How do you read a drone motor?

Motor KV represents the speed at which the motor rotates for every volt applied to the motor. Higher the KV means lower resistance and higher current draw and lower efficiencies. Lower KV means higher resistance and lower current draw and considerably better efficiencies.

## How do you read drone motor specs?

Motor Size Explained

The Size of brushless motors in RC is normally indicated by a 4-digit number – AABB. “AA” is the stator width (or stator diameter) while “BB” is the stator height, both are measured in mm (millimeter).

## How do you size a drone motor?

A good rule of thumb for a quadcopter is to aim for a 4:1 power to weight ratio. It is common to see that number double to 8:1 or more in racing quads. To figure your power to weight ratio, you will want to calculate the max static output of the motors divided by the weight of the quad.

## What is a 250 size brushless motor?

The Park 250 Brushless Outrunner Motor is ideal for 3D models 4–6 oz (115–170 g) and sport and scale models 6–12 oz (170–340 g), or models requiring up to 55 watts of power.

## What do the numbers on a brushless motor mean?

The configuration number tells you how many electromagnets there are on the stator, and the number of permanent magnets there are on the rotor. The number before the letter N shows the number of electromagnets there are in the stator. The number before the P shows how many permanent magnets there are in the rotor.

## How do I choose the right ESC for my motor?

Now, we will learn all these factors one by one,

1. Current Rating. The first thing to consider when selecting an ESC is the current rating or ampere rating. …
2. Input Voltage Rating. …
3. Weight and Size. …
4. ESC Firmware. …
5. With or Without BEC. …
6. Connection of ESC with motor. …
7. ESC Protocols. …
8. ESC Processors.

## What kV means?

Noun. 1. kV – a unit of potential equal to a thousand volts. kilovolt. potential unit – a measure of the potential energy of a unit charge at a given point in a circuit relative to a reference point (ground)

## What motors do drones use?

Generally speaking, brushed motors are used in the smallest drones, whereas larger drones and UAVs will use brushless motors, as they can carry the extra weight of the additional electronics. Brushless drone motors also require an electronic speed controller (ESC) to operate.

## What do the numbers mean on RC electric motors?

The number of turns indicates how much wire is wrapped inside the motor. A higher turn number means more wire and thus more resistance, resulting in a slower motor. So turns with a lower number means a faster motor. The turn rating is inversely proportional to the power generated by the motor.

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## How do I know what size drone I need?

How to Measure Quadcopter Size. The frame size of a quadcopter is the distance from opposite corner motors. So if you measure from the front left motor to the back right motor, that distance (in millimeters) is the frame size.

## How do I choose a drone motor?

Where to Start?

1. Thrust to Weight Ratio. In all types of multirotor, it is important to make sure that the motors used in your drone can product around 50% more thrust than the actual weight of the drone. …
2. KV Ratings. The KV rating is another essential parameter of the motor. …
3. Motor Size.