How can a drone with 4 propellers (as in the photo) fly forwards or backwards. I think the propellers are all on the same level. There is then no propelling movement.
In: Engineering
If the rear two provide more lift than the front two, the drone will tip forwards.
Now the direction of thrust isn’t just straight down, it’s down and back. This pushes the drone forwards.
Some more complex drones can pitch the rotors themselves to direct thrust like a helicopter.
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