04-21-2018, 01:07 AM
|
#14 (permalink)
|
|
aero guerrilla
Join Date: Oct 2008
Location: Warsaw, Poland
Posts: 3,751
Thanks: 1,337
Thanked 750 Times in 477 Posts
|
Quote:
Originally Posted by kach22i
I found something odd, and if all "fluid dynamics" are fair game then explain the advantage of the gap/slot before the movable portion of the rudder.
|
My 2 guesses: - To increase the flow over the movable part. This may slightly increase drag, but improves the efficiency of the rudder, allowing it to be smaller. And a smaller rudder reduces drag and/or noise.
- When the movable part turns to one side, there will be lower pressure on the "back" side, causing additional noise. The gap allows this void to partially fill in, reducing noise.
For a submarine silence is more important than fuel efficiency.
__________________
e·co·mod·ding: the art of turning vehicles into what they should be
What matters is where you're going, not how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread
|
|
|
|