2 ms·

I'm guessing the stresses on the propellers at high rpms typical for planes might be an issue. The issue with plane noise is the tip of the propeller breaking t

I'm guessing the stresses on the propellers at high rpms typical for planes might be an issue. The issue with plane noise is the tip of the propeller breaking the speed of sound. This is what generates a lot of the noise. Having a lot of mass there might be an issue. The prop might rip itself apart. Rpms in water are a lot lower so, it's less of an issue there.

punnerud 4y ago
If you change the angle of the blade, you can have lower rpm. This increased push is a drawback on a normal propeller because more air it pushed outward (loss). This design could solve both of the problems. So airplane propellers can have more push and lower rpm. Some years since I last designed propellers and did run CFD-analysis on them. Could be fun to try it again. This was my last attempt: https://no.m.wikipedia.org/wiki/Sivilingeniør#Utdanning https://no.m.wikipedia.org/wiki/Sivilingeniør#Utdanning
deleted 4y ago
[deleted]