<p>The primary reason that I fly props out is to use the props to push the quad away from trees/gates etc when flying forward.</p>

<p>There is a theory that because the leading edges of the rear props are on the outside that it might compensate for the dirty air coming from the front props in forward flight as well, but I've never noticed any difference in flight on anything bigger than a whoop.</p>

CC BY-SA 4.0
2020-04-14T23:02:18.920Z
2020-04-14T23:02:18.920Z
Ben Wilson
<p>For outdoor quads, the question one must ask is where you want grass and other debris.  If the front/rear of the quad (often where cameras and video antenna hardware is present) is something you want to avoid, run props out.  If you're more concerned about keeping the sides of the electronics stack cleaner and don't have the lens of a camera in the prop plane to absorb junk, props in works quite well.</p>

<p>In hybrid configurations, there are some very minor advantages of the rear props having cleaner air available in props-out configurations, and there are a few mixer edge cases with one corner at maximum commanded thrust where the yaw input matches better, but similar ones in turns where it's not as ideal.
All that aside, really it comes down to where you can tolerate high-speed plant material, sandy grit, and broken polycarbonate peppering the middle of your quadcopter.</p>

CC BY-SA 4.0
2020-04-15T14:33:01.270Z
2020-04-21T04:25:11.980Z
2020-04-21T04:25:11.980Z
Tehllama
<p>It does make a difference for 5" quads.  Here is a good video explaining why...
Inverted Prop Rotation - Quad Theory</p>

<p><a href="https://www.youtube.com/watch?v=RPuFGK_dEXE" rel="nofollow noreferrer">https://www.youtube.com/watch?v=RPuFGK_dEXE</a></p>

CC BY-SA 4.0
2020-05-02T19:34:52.890Z
Please include at least a brief summary of the information you are referring to and refrain from pasting in only links. Thanks!
3k-
CC BY-SA 4.0
2020-04-15T16:11:23.413Z
While this theory has been posited, there is very little support for it in practicality. Data logging on quads with props-in vs props-out shows no difference on larger quads, and there is no detectable difference in handling. It seems to only make a difference practically on smaller quads with lower power-to-weight ratios regardless of the theory.
QuadMcFly
CC BY-SA 4.0
2020-04-15T05:31:25.963Z
2020-04-21T04:25:29.407Z
2020-04-21T04:25:29.407Z
Damon Johnson
<p>As far I know the only difference is on the whoops. They fly much better on props out.
On 2,5-5 inch quads, it doesn't matter. Props in: our camera is dirty, you can stack easier on the tree. Props out: Your flight controller is dirty and then you damage your prop it's a higher risk that pice of the prop damage your flight controller or battery (it is a much higher risk).
Greatings form DE.</p>

CC BY-SA 4.0
2020-04-14T21:53:45.867Z
2020-04-21T04:24:44.583Z
2020-04-21T04:24:44.583Z
J. Schütz
<p>I've heard that the quad will handle better if you reverse the propeller direction (props out), but is the difference noticeable? Especially for a relatively new pilot. Should you use props out from the beginning if you aren't used to one or the other yet?</p>

<p>Are there more advantages, and are there any disadvantages?</p>

<p>Lastly; why have props in become the standard if props out seem to be better?</p>

<multirotor>
What's the advantage of props in VS props out?
Hannes Hultergård
# What's the advantage of props in VS props out?

(Asked by: username_0 on 2020-04-14)

I've heard that the quad will handle better if you reverse the propeller direction (props out), but is the difference noticeable? Especially for a relatively new pilot. Should you use props out from the beginning if you aren't used to one or the other yet?

Are there more advantages, and are there any disadvantages?

Lastly; why have props in become the standard if props out seem to be better?

**Tags:** multirotor


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## 4 answers

### Answer by username_6 on 2020-04-14. Score: 12 | Accepted answer

As far I know the only difference is on the whoops. They fly much better on props out.
On 2,5-5 inch quads, it doesn't matter. Props in: our camera is dirty, you can stack easier on the tree. Props out: Your flight controller is dirty and then you damage your prop it's a higher risk that pice of the prop damage your flight controller or battery (it is a much higher risk).
Greatings form DE.


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### Answer by username_1 on 2020-04-14. Score: 8

The primary reason that I fly props out is to use the props to push the quad away from trees/gates etc when flying forward.

There is a theory that because the leading edges of the rear props are on the outside that it might compensate for the dirty air coming from the front props in forward flight as well, but I've never noticed any difference in flight on anything bigger than a whoop.


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### Answer by username_2 on 2020-04-15. Score: 2

For outdoor quads, the question one must ask is where you want grass and other debris. If the front/rear of the quad (often where cameras and video antenna hardware is present) is something you want to avoid, run props out. If you're more concerned about keeping the sides of the electronics stack cleaner and don't have the lens of a camera in the prop plane to absorb junk, props in works quite well.

In hybrid configurations, there are some very minor advantages of the rear props having cleaner air available in props-out configurations, and there are a few mixer edge cases with one corner at maximum commanded thrust where the yaw input matches better, but similar ones in turns where it's not as ideal.
All that aside, really it comes down to where you can tolerate high-speed plant material, sandy grit, and broken polycarbonate peppering the middle of your quadcopter.


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### Answer by username_3 on 2020-04-15. Score: 0

It does make a difference for 5" quads. Here is a good video explaining why...
Inverted Prop Rotation - Quad Theory

<https://www.youtube.com/watch?v=RPuFGK_dEXE>

> **Comments:**
> **username_5**: While this theory has been posited, there is very little support for it in practicality. Data logging on quads with props-in vs props-out shows no difference on larger quads, and there is no detectable difference in handling. It seems to only make a difference practically on smaller quads with lower power-to-weight ratios regardless of the theory.  
> **username_4**: Please include at least a brief summary of the information you are referring to and refrain from pasting in only links. Thanks!  

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