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A comment on Electrified wingsuit from BMW reaches 186MPH on first flight. Parent comment

Re:Electrified wingsuit from BMW reaches 186MPH on first flight by robotresearcher on Sunday November 15, 2020 @02:59PM (#25104240)
Multirotor designs are not limited to 4 motors. You can add more for redundancy. Four is common because it’s the smallest number that has good control characteristics.
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Re:Electrified wingsuit from BMW reaches 186MPH on first flight by im3w1l on Sunday November 15, 2020 @06:01PM (#25105819)
Mind explaining that one? To me it seems they have an unnecessary degree of freedom: the "diagonal" one.

    ox
    xo
What issues do you get with three motors in an equilateral triangle?

EDIT: I managed to find it, with even number of motors you can prevent unwanted yawing, by letting half spin clockwise and other half spin counterclockwise.

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Re:Electrified wingsuit from BMW reaches 186MPH on first flight by robotresearcher on Sunday November 15, 2020 @08:31PM (#25106947)
Yep. More generally, you can induce the yaw rate you want (up to a limit) in either direction, including zero.

I’m not an expert but IIRC with three rotors you need to be able to control a bit of roll of just one of them to have stable flight control.

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