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How to Test the Thrust of Propellers

Different propeller provides different flying performance, so this project is just for reference for hobbyists.

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For most newbies or to-be hobbyists of drone/aircraft model, propellers are prone to break in plane crashes. So, how to pick or choose the right props would be quite important. But, also not that easy for green hands.

Well, actually there are some tips in selecting the most suitable props (yes, there's no definitely perfect props!!) for your aircrafts.

First you need to know, what's your preferred effect? Steady, agile, or crazy flight?

Thrust of the prop depends on: 1) size; 2) shape/surface area; 3) number of blades; 4) materials

Also take into account the diagonal motors distance, motor power, etc. when choosing.

So if you want higher power, you can use longer props like 6-inch ones, but the agility would be sacrificed. For example, to install an FPV camera on, you need the power. How the prop looks like will also determine its thrust - in the shape of bull nose (BN), hybrid BN (HBN), and pointy nose. Thrust: HBN>BN>pointy nose. Also the number of blades can affect the power: 2-blade, 3-blade, 4-blade, etc.; the more blades, the higher power.

After knowing these determinants, you may still be confused. So let the facts speak for themselves. I'll show you how to use a scale to test the thrust of props. 

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View all 2 project logs

  • 1
    Preparations

    Electronic scale

    3-blade CCW prop - http://bit.ly/2tAQs2x

    Frame arms x 3 (to fix the motor)

    SF motor - http://bit.ly/2s2hCx6

    3S Li-Po battery - http://bit.ly/2t2ruLR

    Radio transmitter - http://bit.ly/2sIjAoq

    Receiver - http://bit.ly/2sIjAoq

    Power distribution board - http://bit.ly/2s2wD27

    ESC - http://bit.ly/2t1j6ww

    3M tape

    Wire ties

    M3 screws x 4

    L-shape screwdriver

    Prop removal wrench

  • 2
    Power on the scale

    Usually the weighing tray can be uninstalled easily. Just gently take it away. Below, there are slots and a hollow space underneath. We'll fix the motor by tying through these slots. 

  • 3
    Install the motor onto the frame arms

    Remove the bullet cap on the motor with the prop removal wrench.

    Assemble two frame arms, align their holes to those on the motor, insert the screws into the holes, and screw them tight with the L-shape screwdriver. 

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