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  1. M


    Basically, a swivel joint which can turn smoothly, lock solid, or anything inbetween. I've found good substitutes for most other basic mechanical parts but the "simplest" replacement I've found for this part is variable-angle wings for variable drag.
  2. M

    Multirotor Stability

    We've all made quadcopters, right? You fight through all the balancing and reversing to get a neutral machine and discover that "neutral" is not the same thing as "stable". It's a constant fight to keep it centered, and you go back to winged designs or balloons. Now, take this thing with...