Steering a Submarine

[toppack]

There is something I've wondered about Full-scale Subs.
In modern Subs, Is there a way to 'bank' in a sharp turn, like in aircraft, or can turns only be done in a flat skid?
Or can they even be turned fast enough to produce a Skid?
I assume sharp turns are not usually required but I'd think they would be sometime?

[He Who Shall Not Be Named]

There is something I've wondered about Full-scale Subs.
In modern Subs, Is there a way to 'bank' in a sharp turn, like in aircraft, or can turns only be done in a flat skid?
Or can they even be turned fast enough to produce a Skid?
I assume sharp turns are not usually required but I'd think there would be sometime?

Limiting this discussion to combatants:

With the exception of the modern SEAWOLF, VIRGINIA, and some modern European boats, no, there are no active roll control surfaces (but there are fixed roll control stabilizers -- the American 'anhedrals' come to mind).

Anyone want to challenge these assertions?

The inboard bank in a turn is an artifact of the sails position and forces that structure creates as the angle of attach increases about the yaw axis. Looks neat but is a ship control problem which can mature (as a consequence of 'vortex shedding') into a nasty 'snap-roll'. A very bad, 'depth excursion' can result.

David,

[toppack]

Thanks for the Info, David

Wow, snap-roll a Sub! :eek: I don't think I'd want to be onboard during that! :eek:

[toppack]

there are fixed roll control stabilizers -- the American 'anhedrals' come to mind).
David,

'Anhedrals' are horizontal surfaces that angle down at outer tips, correct?

[Nuke Power]

Yup. Here you can see them on my trumpter seawolf.

[toppack]

Ah okay, they are about half way between horizontal and vertical, on that sub anyway?

[redboat219]

Do these anhedrals on RC boats exert the same effects as those on real boats?

[Slats]

Speaking of yank and bank...

Have had enormous amounts of fun driving my Alfa in olympic pools at high speed. Throw in some rudder - she rolls a little into the turn , next add some up rear planes - boy does shes kick through the turn. The closest thing I have had to flying a fighter jet underwater...a fun boat all round.

J

[junglelord]

A member named SNOWTANK on another forum is building a RC Caswell Conversion Seaview and asked this question about the bow planes of this peculiar design....
"I wonder if the fins could be used like a jet aircraft 's flaps where one is down and one is up to allow steep turns. "

What do you think Mr Merriman?

[toppack]

I don't know about steep-turns but it should do some great Snap-rolls. :eek:

[He Who Shall Not Be Named]

A member named SNOWTANK on another forum is building a RC Caswell Conversion Seaview and asked this question about the bow planes of this peculiar design....
"I wonder if the fins could be used like a jet aircraft 's flaps where one is down and one is up to allow steep turns. "

What do you think Mr Merriman?

Not 'flaps', 'ailerons'. Tell that idiot to stop over-thinking it and build it as I tell 'em, I wear PINK underwear!I wear PINK underwear!I wear PINK underwear!I wear PINK underwear!it!

David,

[toppack]

:D LOL :D
And be sure to tell him that the guy named David, that wears *Pink Underware* told you to say it.
Everyone will know who you're talking about then. :D
I'll drink to THAT!

[Kazzer]

Yes, he does!

And 'earned' another 'cuss' infraction point today, I see!

[Kazzer]

Oh! Yes, and another 'infraction point' for calling our treasured member an idiot.

TuT! TuT!

I'll have to add 'idiot' to the pink underwear cuss monitor!

:(

BTW Ellie told me he actually wears pink ones with white polka dots on! Its very sad! Very sad!

[Slats]

But Mike some of us like idiot / moron and dweb.

It says so much for such little effort.:D:D:D:D

J