A few ?'s to Drone Motors, ESC's, & Prop Size

Lynxmotion UAVs / Drones
1

Ok, I’m new to the 4-rotor drone thing and trying to build my own for a class project. I ordered parts already. Here’s what I got:

Motors: Outrunner Sunshine 880KV Brushless

ESCs: Multicopter 20A-BEC

Propellers: 12 x 4.5

Most of my questions are to ensure I understand things correctly. Here they are:

  1. On the Motors, the specs on the motor on your website for recommended batteries, ‘Lipo: 2-4S’. Does this mean you need a quantity of two batteries that are both 4S (i.e. 14.8V), or more so, does it mean these motors can run on as low as 2S (7.4V) up to 4S (14.8V)? I’m assuming the latter is the case so and the battery rating of ‘Lipo: 2-4s’ basically means they can run within a voltage range of 7.4V to 14.8V. Can you confirm?

  2. Regarding propellers for these motors, again on your website, they recommend what I believe is 3 different props. It says ‘Propeller: 12x6/10x7/9x6’. In reference to the previous question, does these sizes refer to if you’re running at 2S (7.4V), 3S (11.1V), and 4S (14.8V) or is it something different? Mainly, I bought 12 x 4.5 props. These are big in diameter but a little lower on pitch than the ones listed. If I run at 14.8V, should I be using smaller props?

  3. My final question is on the ESCs. I’m assuming these are already loaded is firmware. Do I have to re-program these at all?

I appreciate any feedback
Thanks,
Tom

2

Hi Tom,

  1. You are right, it mean the motor can handle batteries between 2s and 4s (7.4V to 14.8V).
  2. The manufacturer of those motors don’t provide any chart for their motors, it could be related to the battery voltage applied yes.
  3. If you are talking about “20A BEC Multirotor ESC (Without Connectors)” than yes, they are provided with firmware. You will need to program the Minimum and Maximum throttle signal with your transmitter connected to them. Like any ESC’s.