Hexacopters and octocopters, with six and eight propellers, can provide redundancy, but quadrocopters are much more popular because they have the minimum number of fixed motor propeller pairs: four.
Hexakoptere og octokoptere,  med seks og otte propeller, skaffer redundans, men quadrokoptere er meget mere populære fordi de har minimumsantallet af faste motor propelpar: fire.