2 ms·
it's usually about how much energy your setup takes to recapture turbulence into useful energy after the first spin, and it's a tight-rope act trying to figure
by serf 3y ago
it's usually about how much energy your setup takes to recapture turbulence into useful energy after the first spin, and it's a tight-rope act trying to figure that stuff out.
So yes, I imagine you could, but at some point those hydrodynamic gains run into the physics problem of spinning mass even if you can walk the turbulence tight-rope.
- schiffern 3y agoI wonder how contra-rotating schemes compare to something like PBCF? https://www.youtube.com/watch?v=a8PjWSeLUzY https://www.youtube.com/watch?v=a8PjWSeLUzY It seems like it should achieve almost the same de-vortex efficiency gains, but without all that added mechanical complexity, skin drag, and underwater noise (PBCF is actually quieter than having no fuel-saving device). Honestly I'm surprised Sharrow doesn't already use it on their regular toroidal propellers. I notice a lot of hub vortex in their underwater videos...