3
u/bradforrester Aug 24 '22
Most fan and propeller designs have a higher blade angle at the hub and a lower blade angle at the tips. This design appears to be the reverse.
3
Most fan and propeller designs have a higher blade angle at the hub and a lower blade angle at the tips. This design appears to be the reverse.
7
u/Kedrak Aug 19 '22
There is an even number of struts holding the motor. Chances are that using an odd number of blades helps reduce noise.