MOBULA7 UPGRADE: EAsiest way to go props out to improve flight

Reversing the rotation of all of your propellers (known as 'props out') is something you commonly do on larger quads to eliminate debris bring flung into your FPV camera and to push obstacles like branches clear. Obviously these don't apply when the props are gaurded like in a Mobula 7 but there is also a hypothesis out there that it can improve flight characteristics such as note on KababFPV's video here. Some of the beta fpv guys also believe it helps with yaw washout but the evidence appears inconclusive. Typically to do this correctly you need to

1. Remove and swap all of the props
2. Reverse each ESC direction in BL Heli Suite
3. Tick 'reverse props' in betflight.

The method documented here allows you to skip steps 1 and 2 which is especially useful because you can run the risk of damaging the rather fragile motors when removing and re-installing the propellers. Just a quick note the the Eachine trashcan comes default with reversed-props.

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This is the fourth article in my series of HappyModel Mobula7 upgrades, many of which can be used for the Trashcan too. Also to come are:

• Swapping to a much more durable frame​
• Improving the battery connector for more power
• tuning betaflight filters more specifically for brushless whoops, 
• propeller upgrades. 
• receiver range improvement
• modding your 1s battery to be a proper 2s

All links will be updated here when completed. Many of these I've completed the work and am testing at present - it's starting to feel like a more complete little quad now. If you're looking for my review including setup it can be found here

Below are the steps to take when changing to props out. I'd recommend doing this when switching frames. I did it when I upgraded to the v3/trashcan frame as I wrote about here. Use the little philips screwdriver that came with your quadcopter. Click images to embiggen.

1. Remove the motor pins from the board. Rather than tuggin the wire I'd recommend using small pliers or tweezers to pull on the plastic connector instead.

2. Next you will need to unscrew all four motors and take note of where the motors with red wires are and where the motors with black wires are. DO NOT REMOVE THE PROPS!

3. Now swap locations of the red and black-wired motors and replace the screws. For me the new location for red-wired motors is front right and rear left. (This picture is from below)

4. Finally jump into betaflight and tick the box that says "motor direction is reversed". End result should look like the image above.

That's it - easy eh? If the quad flips out when you throttle up, check the physical rotation is the same as shown in the betaflight image for prop rotation above.

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