Quote:
Originally Posted by freebeard
It's interesting. I presume the blister on the leading edge is to reduce leeward turbulence. But why the step above and below it?
Oh no, Pelican Parts thread, there goes the rest of my afternoon.
|
Notice as well, a slight twist at the top root.
This rudder is also acting like a vane straightening stator.
I'm assuming the smaller lower section is simply to reduce the stress, a cantilever moment arm is what the rudder actually is.
Remember, the swirling rotation of the water coming off the prop is best met at by right angles. However if they did that it would turn really well in one direction, and not at all in the other direction. This design is a compromise of some sort.
https://www.cambridge.org/core/journ...91B3DCBB77B7FE
http://www.wavefront.co.jp/CAE/PumpL...propeller.html
http://www.hhscott.com/evinrude/choosing_a_prop.htm
__________________
George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
Last edited by kach22i; 08-24-2018 at 03:06 PM..
|