4 ms·

I don't see how inverting the props is necessarily any more efficient.

• nathannecro 14y ago
  From the Kickstarter: "Why are your props upside down? The inverted props give an efficiency gain proportional to the amount of obstacles in the air column. We've found it varied between 10-20% depending on the frame and protection ring design. The inverted props also let us put the props right in the middle of the center of gravity for awesome control response. Even better, with the props on the bottom they keep spinning when you run up against the ceiling making flying indoors a breeze."
• sebbi 14y ago
  No arms in downwash, closer together (when all copter electronic parts are on the topside of the frame) ... plus you might be more likely to hit the ceiling indoors than the floor.
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