About periscope up speed damage

Pilot_76 · 11-12-11, 01:07 PM

Playing Dangerous Waters there is a limit (I think 5-8 kts) that the periscope can be raised while submerged/surfaced without suffering damage. SH 4 or other SH do not have this feature. If this is the real thing on WWII boats as well can we modify some files to simulate this?

Kongo Otto · 11-13-11, 08:30 AM

Quote:

Originally Posted by Pilot_76

Playing Dangerous Waters there is a limit (I think 5-8 kts) that the periscope can be raised while submerged/surfaced without suffering damage. SH 4 or other SH do not have this feature. If this is the real thing on WWII boats as well can we modify some files to simulate this?

Well modern subs can go way faster than 8 knots when submerged so there is a need for an speed limit to raise the periscope.
Fleet Boats and U-Boats couldn't go faster than 8 knots while submerged so there is no need for such a limitation.

Sailor Steve · 11-13-11, 10:41 AM

On the other hand there is anecdotal evidence that raising the periscope at more than 3 knots would cause enough vibration to render the image unviewable.

Pilot_76 · 11-13-11, 12:40 PM

I got damage at 8 kts in DW or a bit faster so I thought raising the scope while submerged at 9kts in a Balao would do damage as well....I was just curious as if in a real WWII boat they would go from ahead full to 1/3 submerged to prevent damage to the scope.

Sailor Steve · 11-13-11, 02:18 PM

As I said, it's my understanding that damage wasn't the problem so much as not being able to see anything due to vibration. That said, I really don't know the exact parameters and problems.

I always slow down to use the periscopes, but that may just be me.

Pilot_76 · 11-13-11, 03:52 PM

Quote:

Originally Posted by Sailor Steve

As I said, it's my understanding that damage wasn't the problem so much as not being able to see anything due to vibration. That said, I really don't know the exact parameters and problems.

I always slow down to use the periscopes, but that may just be me.

Yep. That's common sense. I'd do that too.

TorpX · 11-13-11, 04:28 PM

I think SS is right about it being mainly a vibration issue. Possibly it also made the feather easier to spot; I'm not sure about that. O' Kane talked about stopping the engines and waiting as their speed fell before raising the scope. In the game though, it is more of a pain because the boats do not slow rapidly on their own, so some put the engines in reverse to accomplish this.

berobispo · 11-13-11, 06:23 PM

I'm also trying to use the periscope only at 1/3 ahead for detection reasons (when within 6000 yards, sticking to the submarine manual from the hnsa.org website) but I'd like to know whether the game/mods actually take this into consideration when it decides how likely detection from a destroyer is:-)

TorpX · 11-13-11, 07:00 PM

Quote:

Originally Posted by berobispo

I'm also trying to use the periscope only at 1/3 ahead for detection reasons (when within 6000 yards, sticking to the submarine manual from the hnsa.org website) but I'd like to know whether the game/mods actually take this into consideration when it decides how likely detection from a destroyer is:-)

AFAIK, it does not. Detection is these circumstances is mainly governed by sea state, light, and length of exposure, I think. I wouldn't worry about being spotted beyond 4,000 yd. though. I mean really if they are too far away for you to see a man on deck or any details of their ships (at 6x magnification), how on earth would they be able to see your periscope?

berobispo · 11-14-11, 12:25 PM

Quote:

Originally Posted by TorpX

how on earth would they be able to see your periscope?

I think the water feather the periscope draws would be visible, but as I am not a sailor I can't say...

11-12-11, 01:07 PM	#1
Pilot_76 Chief Join Date: Mar 2010 Location: São Paulo, Brazil Posts: 311 Downloads: 427 Uploads: 0	About periscope up speed damage Playing Dangerous Waters there is a limit (I think 5-8 kts) that the periscope can be raised while submerged/surfaced without suffering damage. SH 4 or other SH do not have this feature. If this is the real thing on WWII boats as well can we modify some files to simulate this?

11-13-11, 10:41 AM	#3
Sailor Steve Eternal Patrol Join Date: Nov 2002 Location: High in the mountains of Utah Posts: 50,369 Downloads: 745 Uploads: 249	On the other hand there is anecdotal evidence that raising the periscope at more than 3 knots would cause enough vibration to render the image unviewable. __________________ “Never do anything you can't take back.” —Rocky Russo

11-13-11, 02:18 PM	#5
Sailor Steve Eternal Patrol Join Date: Nov 2002 Location: High in the mountains of Utah Posts: 50,369 Downloads: 745 Uploads: 249	As I said, it's my understanding that damage wasn't the problem so much as not being able to see anything due to vibration. That said, I really don't know the exact parameters and problems. I always slow down to use the periscopes, but that may just be me. __________________ “Never do anything you can't take back.” —Rocky Russo

11-13-11, 12:40 PM	#4
Pilot_76 Chief Join Date: Mar 2010 Location: São Paulo, Brazil Posts: 311 Downloads: 427 Uploads: 0	I got damage at 8 kts in DW or a bit faster so I thought raising the scope while submerged at 9kts in a Balao would do damage as well....I was just curious as if in a real WWII boat they would go from ahead full to 1/3 submerged to prevent damage to the scope.

11-13-11, 04:28 PM	#7
TorpX Silent Hunter Join Date: Sep 2010 Posts: 3,975 Downloads: 153 Uploads: 11	I think SS is right about it being mainly a vibration issue. Possibly it also made the feather easier to spot; I'm not sure about that. O' Kane talked about stopping the engines and waiting as their speed fell before raising the scope. In the game though, it is more of a pain because the boats do not slow rapidly on their own, so some put the engines in reverse to accomplish this.

11-13-11, 06:23 PM	#8
berobispo Helmsman Join Date: May 2009 Location: Germany Posts: 102 Downloads: 174 Uploads: 4	I'm also trying to use the periscope only at 1/3 ahead for detection reasons (when within 6000 yards, sticking to the submarine manual from the hnsa.org website) but I'd like to know whether the game/mods actually take this into consideration when it decides how likely detection from a destroyer is:-)