are counter rotating props mandatory ?

[kos]

Hi,

are counter rotating props mandatory ?
is there a general guidline for offset thrust by angling the motor and what is this minimal motors count ?

thanks in advance for any hints

http://fpvlab.com/forums/showthread.php ... ting-props

viewtopic.php?f=16&t=1095

[copterrichie]

There are people that have used props spinning all in the same direction like Simon on RCG. He did it by tilting each motor a few degrees. I can clearly see using all the same spinning props on a V-Tail configuration but for a standard Quad, Nope.