GWX Problem (periscope depth)

Pappy55 · 08-23-07, 01:02 PM

Hi all,

I have just done a clean install od SHII with the 1.4b patch and installed GWX and appied the 1.3 patch to that.

Everything seams to work fine except one small problem..

I have started a campaign in a Type II boat and when i ordred periscope depth the boat hovers at 10m below and the top of the tower stick out the water.

Can anyone throw some light on this?

Dowly · 08-23-07, 01:06 PM

Hi Pappy!

The boat settles down 1-2 meters above the ordered depth, this is because of the positive bouyance modeled in GWX. In real life, uboat was very hard to keep evenly balanced while submerged, so what they did was that they set the bouyance to be slightly positive (or negative, depends of the source of information).

Enjoy the GWX!

Sailor Steve · 08-23-07, 02:04 PM

Of course the sub shouldn't stop at 10 meters, but should keep coming up. In real life they also leaked, so the sub should go down and keep going down, just like it does in NYGM. On the other hand, it only does that in either mod if you go too slow, just like real life.

IrischKapitan · 08-23-07, 02:45 PM

Quote:

Originally Posted by Pappy55

Hi all,

I have just done a clean install od SHII with the 1.4b patch and installed GWX and appied the 1.3 patch to that.

Everything seams to work fine except one small problem..

I have started a campaign in a Type II boat and when i ordred periscope depth the boat hovers at 10m below and the top of the tower stick out the water.

Can anyone throw some light on this?

Just order your depth to 14-15m, and you will have no problems!

poor sailor · 08-23-07, 02:48 PM

I also like the positive buoyancy in GWX and must say very like that. But I must say that I also liked negative buoyancy when I played NYGM mod, but I think that's the positive buoyancy is much better solution and very well represented in GWX. Just small quote from the NYGM readme:

"The NYGM Anti Humming Bird Mod is a feature where the u-boat can no longer hover
at all stop. At all stop, the u-boat will slowly sink (I would have preferred to have
positive buoyancy but that is not possible) at a very slow rate."

But, It's possible, and GWX team made It.

Sailor Steve · 08-23-07, 04:28 PM

Quote:

Originally Posted by poor sailor

IBut, It's possible, and GWX team made It.

So why doesn't somebody make it real, so it keeps rising?

Kpt. Lehmann · 08-23-07, 08:59 PM

Quote:

Originally Posted by Sailor Steve

Quote:

Originally Posted by poor sailor

IBut, It's possible, and GWX team made It.

So why doesn't somebody make it real, so it keeps rising?

LOL, because if we did... diving your boat would be like trying to submerge a cork.

We live in an imperfect world without adjustable bouyancy.

Brag · 08-23-07, 09:25 PM

Quote:

Originally Posted by Kpt. Lehmann

Quote:

Originally Posted by Sailor Steve

Quote:

Originally Posted by poor sailor

IBut, It's possible, and GWX team made It.

So why doesn't somebody make it real, so it keeps rising?

LOL, because if we did... diving your boat would be like trying to submerge a cork.

We live in an imperfect world without adjustable bouyancy.

And bouyancy whether pos or neg will find equilibrium somewhere.

siber · 08-24-07, 06:41 AM

I only use the 'periscope depth' command to take me down without faffing about clcking on the right place on the dial. Then, when we're going down, I select 12m for periscope use. and it generally settles at 11m at 2kts or 'all stop'.

Tom · 08-24-07, 07:54 AM

Quote:

Originally Posted by Brag

And bouyancy whether pos or neg will find equilibrium somewhere.

Actually, as a submarine goes deeper, it replaces slightly less water due to the pressure on the hull, thus losing buoyancy. When it moves upwards, it gains buoyancy for the opposite reason.

This means that the equilibrium point is never stable. If you trim the boat for a certain depth, any change from that depth will cause the submarine to drift further and further away from the trim depth with an increasing speed.

Anyone who has tried diving knows this effect. When you let out a little bit of air from your vest to go deeper, you will never reach an equilibrium, but instead keep going deeper and deeper at an increasing speed, unless you constantly add air to your vest.

This effect is very real, and was well known. The Submarine Commander's Handbook tells us:

181.) Always go down dynamically to a low depth! Flooding is a mistake: The submarine automatically becomes heavier with increasing depth (leaking of the stern stuffing boxes and other openings, reduction of volume (contraction) of the body of the submarine) and it may well happen that it drops to a greater depth than is intended. Consequently in diving to considerable depths, the maximum engine power should be used, and it is even advisable to pump out the boat (for example, in the case of Type VII, approximately 1 ton).

08-23-07, 01:02 PM	#1
Pappy55 Engineer Join Date: Jan 2005 Location: Birmingham, UK Posts: 211 Downloads: 173 Uploads: 0	GWX Problem (periscope depth) Hi all, I have just done a clean install od SHII with the 1.4b patch and installed GWX and appied the 1.3 patch to that. Everything seams to work fine except one small problem.. I have started a campaign in a Type II boat and when i ordred periscope depth the boat hovers at 10m below and the top of the tower stick out the water. Can anyone throw some light on this? __________________

08-23-07, 02:04 PM	#3
Sailor Steve Eternal Patrol Join Date: Nov 2002 Location: High in the mountains of Utah Posts: 50,369 Downloads: 745 Uploads: 249	Of course the sub shouldn't stop at 10 meters, but should keep coming up. In real life they also leaked, so the sub should go down and keep going down, just like it does in NYGM. On the other hand, it only does that in either mod if you go too slow, just like real life. __________________ “Never do anything you can't take back.” —Rocky Russo

08-24-07, 06:41 AM	#9
siber Planesman Join Date: Mar 2007 Location: Salford, Manchester, UK Posts: 182 Downloads: 3 Uploads: 0	I only use the 'periscope depth' command to take me down without faffing about clcking on the right place on the dial. Then, when we're going down, I select 12m for periscope use. and it generally settles at 11m at 2kts or 'all stop'. __________________ Using GWX 3.0 at 100% realism, OLC's 'Ubermod' & Torpdamagefinal

08-23-07, 01:06 PM	#2
Dowly Lucky Jack Join Date: Apr 2005 Location: Finland Posts: 25,052 Downloads: 32 Uploads: 0	Hi Pappy! The boat settles down 1-2 meters above the ordered depth, this is because of the positive bouyance modeled in GWX. In real life, uboat was very hard to keep evenly balanced while submerged, so what they did was that they set the bouyance to be slightly positive (or negative, depends of the source of information). Enjoy the GWX!

08-23-07, 02:48 PM	#5
poor sailor XO Join Date: May 2006 Location: Serbia Posts: 420 Downloads: 15 Uploads: 0	I also like the positive buoyancy in GWX and must say very like that. But I must say that I also liked negative buoyancy when I played NYGM mod, but I think that's the positive buoyancy is much better solution and very well represented in GWX. Just small quote from the NYGM readme: "The NYGM Anti Humming Bird Mod is a feature where the u-boat can no longer hover at all stop. At all stop, the u-boat will slowly sink (I would have preferred to have positive buoyancy but that is not possible) at a very slow rate." But, It's possible, and GWX team made It.