Props, motors CW CCW confusion

[uneasy]

I am about to chose Motors and propellers to quad I am building.

I've seen different approaches (I think), there is some DIY guides that e.g. have same 4 motors (no CCW or CW), and then they say they use 2xCW and 2xCCW propellers.

While I was thinking it's about having CCW and CW motors (threads) so it can lock the propeller, this doesn't make sense, or it does ?

I though I can have 4 same motors, and 4 same propellers and just revert 2 of them on ESC ?
Or the idea of having CW and CCW propellers is, so you don't have to revert ESCs ?

Could someone clarify it to me please? And maybe suggest which approach is the best ?

 

[Launchpad]

You MUST use CW & CCW props. They MUST be rotating in the proper direction.
Some motors are made with both direction threads so the prop nuts are self-tightening. It's not necessary to use them, just to make sure they're tight. As you said, the motor direction can be adjusted vie ESC or wiring.

 

[wafflejock]

The cw vs ccw just has to do with the thread direction for the nuts I would just get all the same and use nyloc nuts then the direction of the thread barely matters just tighten down the nyloc well and won't be able to spin itself loose easily anyway. Idea with thread going different direction is to have it "self tighten" when the motor spins up but with nyloc nuts it makes no difference. The motor direction can be easily flipped by swapping any two of the three phase wires that come from esc to motor or by changing settings in blheli esc configuration.

 

[uneasy]

So to summarise, I need whatever motors, and CW and CCW props, and VW needs to rotate in CW direction and CCW needs to rotate in CCW direction. Got it, thank you

 

[wafflejock]

So to summarise, I need whatever motors, and CW and CCW props, and VW needs to rotate in CW direction and CCW needs to rotate in CCW direction. Got it, thank you

Yah what matters most is motors diagonal to each other on the frame are going same direction and ones that are "neighbors" if doing a ring around the quad should be going opposite direction, betaflight shows the directions each motor should spin on the configuration tab.

 

[wafflejock]

Also as badfish mentioned need props to correspond to the motor spinning direction, the props (cw vs ccw) is tilted one way or the other so need right ones on motors spinning in the corresponding direction. To reiterate motors cw/ccw doesn't really matter but props cw vs ccw or usually labelled R are opposite tilt from each other so one goes on the CW spinning motors and one goes on the CCW spinning motor. Easy way to tell is give it a tiny bit of throttle and if air is blowing up instead of down then wrong prop on the motor basically just want to make sure the leading edge of the prop is higher in the direction it's spinning so it is scooping the air down. After doing it a few times it becomes pretty easy to just eyeball it spinning them by hand.