SUBSIM Radio Room Forums - View Single Post - [REL] U-boat Dynamics for SH4 OM

G7eT2 · 09-26-13, 03:30 PM

This is a game play mod for Silent Hunter 4 with Operation Monsun.

Link to download page : http://www.subsim.com/radioroom//dow...o=file&id=4220

Installation instructions :

- Place " U-boat Dynamics for SH4 OM " into your Mods folder.
- Enable with JSGME.

If you are playing campaign mode you will need to start a new career for
this mod to work properly.

From the readme -

This mod does the following :

1 - Reduces u-boat acceleration.

To levels comparable with the Ship Acceleration Physics mod which is used
in Operation Monsun. Acceleration is still faster than real u-boats.

2 - Increases diving rates.

Crash dive times are as follows.
Time taken to reach 13m.

IIB/C 35 IID 25

VIIB 30 VIIC 27

IXB 35 IXC 37 IXD2 42

XXI 25 to 14m

3 - Adjusts submerged ranges and battery recharge times.

Low speed submerged ranges are increased.
Battery recharge times are reduced.

You will find propulsion specialists in your engine rooms.
They are required to make this mod work.

>>>>>>>>>> Note:
The type XXI and XXIII use the same " submerged range vs speed " curves
as the other u-boats.
This results in curves with a dip in them.
A graph of this is in the readme.

The submerged ranges at cruising speeds for the XXI and XXIII are close to realistic values.

XXI 630km at 5knots
XXIII 360km at 4knots

The ranges at speeds above 9 knots are greater than realistic values.

As a result of compromises the type XXI and XXIII have a faster battery recharge than I was aiming for. The XXI should take twice as long and the
XXIII should take four times as long.

Therefore if it took you one hour to recharge your batteries, and you wanted to simulate more realistic battery charging behaviour, you could continue running on the surface or schnorkeling for another hour in the XXI or another 3 hours in the XXIII.

4 - Adjusts turning circles

Type II's turning circle is smaller than type VII.
Type IX's turning circle is larger than type VII.
Full rudder reduces speed much faster than ordering full astern.
Use less than full rudder to maintain more speed in turns.

5 - Increases crush depths

U-boats would dive below 200m only in extreme circumstances.
Crush depths were deeper for all except type II.

6 - Applies the stock game's " destruction over time " model to the u-boat
when it exceeds crush depth.

To give a warning of impending doom and time to try to avoid it.

7 - Simulates a 6 knot silent speed for the type XXI and
a 4.5 knot silent speed for the type XXIII.

This only influences hydrophone detection, not sonar/asdic.

8 - Sets maximum speeds :

IIB 13.0 7.0 VIIB 17.9 8.0
IIC 12.0 7.0 VIIC 17.7 7.6
IID 12.7 7.4 VIID 16.7 7.3

IX 18.2 7.7 XXI 15.6 17.2
IXB 18.2 7.3 XXIII 9.7 12.5
IXC 18.3 7.3
IXD2 19.2 6.9

>>>>>>>>>Note: The UI knotmeter often indicates a higher than correct maximum speed.

Example: VIIC

Intended speed 17.7
Measured speed 17.67 18min 20sec for 10km
UI indicated speed 18.4

9 - This mod tries to maintain depth keeping below 180m.
Other things which may improve depth keeping are :

Levelling off at higher speed before switching to low speed.

A factor that seems to influence the rate of sinking below 180m is the rate of diving
as the u-boat passes the 180m mark.

In order to reduce the rate of sinking below 180m:
- level off just before 180m
- dive slowly past 180m
- once past 180m increase diving rate if required

Examples of changes to the VIIC u-boat.

without mod -----> with mod

) Reduced acceleration

surfaced 0 to 10 knots = 10 sec -----> 20 sec

surfaced 0 to 15 knots = 22 sec -----> 52 sec

submerged 2 to 6 knots = 14 sec -----> 34 sec

) Increased diving rates

crash dive time to 13 m = 26 sec -----> 27 sec

normal dive at flank

depth after 1 min = 14 m -----> 30 m

depth after 2 min = 45 m -----> 82 m

depth after 3 min = 90 m -----> 138 m

) submerged ranges and recharge times

submerged range at 2 knots = 121 km -----> 240 km

submerged range at 4 knots = 75 km -----> 105 km

submerged range at flank = 7 km -----> 9 km

time taken for full battery recharge = 26 hrs -----> 8 hrs

Change log :

v1.1 - reduced surfaced UD drag from 0.5 to 0.05 to increase pitching in rough seas.

References

http://www.uboatarchive.net/Manual.htm

http://www.hnsa.org/doc/id/oni220-ge.../index.htm#toc

http://www.scribd.com/doc/23575323/A...ype-Vii-U-Boat

Thanks to:

- Lurker_HLB3
and all the other contributors for creating Operation Monsun

- skwasjer
for S3D Silent 3ditor

- JSCones
for JSGME

Gute Jagd Kaleuns

09-26-13, 03:30 PM	#1
G7eT2 Watch Join Date: Jan 2010 Posts: 23 Downloads: 70 Uploads: 2	[REL] U-boat Dynamics v1.1 for SH4 OM This is a game play mod for Silent Hunter 4 with Operation Monsun. Link to download page : http://www.subsim.com/radioroom//dow...o=file&id=4220 Installation instructions : - Place " U-boat Dynamics for SH4 OM " into your Mods folder. - Enable with JSGME. If you are playing campaign mode you will need to start a new career for this mod to work properly. From the readme - This mod does the following : 1 - Reduces u-boat acceleration. To levels comparable with the Ship Acceleration Physics mod which is used in Operation Monsun. Acceleration is still faster than real u-boats. 2 - Increases diving rates. Crash dive times are as follows. Time taken to reach 13m. IIB/C 35 IID 25 VIIB 30 VIIC 27 IXB 35 IXC 37 IXD2 42 XXI 25 to 14m 3 - Adjusts submerged ranges and battery recharge times. Low speed submerged ranges are increased. Battery recharge times are reduced. You will find propulsion specialists in your engine rooms. They are required to make this mod work. >>>>>>>>>> Note: The type XXI and XXIII use the same " submerged range vs speed " curves as the other u-boats. This results in curves with a dip in them. A graph of this is in the readme. The submerged ranges at cruising speeds for the XXI and XXIII are close to realistic values. XXI 630km at 5knots XXIII 360km at 4knots The ranges at speeds above 9 knots are greater than realistic values. As a result of compromises the type XXI and XXIII have a faster battery recharge than I was aiming for. The XXI should take twice as long and the XXIII should take four times as long. Therefore if it took you one hour to recharge your batteries, and you wanted to simulate more realistic battery charging behaviour, you could continue running on the surface or schnorkeling for another hour in the XXI or another 3 hours in the XXIII. 4 - Adjusts turning circles Type II's turning circle is smaller than type VII. Type IX's turning circle is larger than type VII. Full rudder reduces speed much faster than ordering full astern. Use less than full rudder to maintain more speed in turns. 5 - Increases crush depths U-boats would dive below 200m only in extreme circumstances. Crush depths were deeper for all except type II. 6 - Applies the stock game's " destruction over time " model to the u-boat when it exceeds crush depth. To give a warning of impending doom and time to try to avoid it. 7 - Simulates a 6 knot silent speed for the type XXI and a 4.5 knot silent speed for the type XXIII. This only influences hydrophone detection, not sonar/asdic. 8 - Sets maximum speeds : IIB 13.0 7.0 VIIB 17.9 8.0 IIC 12.0 7.0 VIIC 17.7 7.6 IID 12.7 7.4 VIID 16.7 7.3 IX 18.2 7.7 XXI 15.6 17.2 IXB 18.2 7.3 XXIII 9.7 12.5 IXC 18.3 7.3 IXD2 19.2 6.9 >>>>>>>>>Note: The UI knotmeter often indicates a higher than correct maximum speed. Example: VIIC Intended speed 17.7 Measured speed 17.67 18min 20sec for 10km UI indicated speed 18.4 9 - This mod tries to maintain depth keeping below 180m. Other things which may improve depth keeping are : Levelling off at higher speed before switching to low speed. A factor that seems to influence the rate of sinking below 180m is the rate of diving as the u-boat passes the 180m mark. In order to reduce the rate of sinking below 180m: - level off just before 180m - dive slowly past 180m - once past 180m increase diving rate if required Examples of changes to the VIIC u-boat. without mod -----> with mod ) Reduced acceleration surfaced 0 to 10 knots = 10 sec -----> 20 sec surfaced 0 to 15 knots = 22 sec -----> 52 sec submerged 2 to 6 knots = 14 sec -----> 34 sec ) Increased diving rates crash dive time to 13 m = 26 sec -----> 27 sec normal dive at flank depth after 1 min = 14 m -----> 30 m depth after 2 min = 45 m -----> 82 m depth after 3 min = 90 m -----> 138 m ) submerged ranges and recharge times submerged range at 2 knots = 121 km -----> 240 km submerged range at 4 knots = 75 km -----> 105 km submerged range at flank = 7 km -----> 9 km time taken for full battery recharge = 26 hrs -----> 8 hrs Change log : v1.1 - reduced surfaced UD drag from 0.5 to 0.05 to increase pitching in rough seas. References http://www.uboatarchive.net/Manual.htm http://www.hnsa.org/doc/id/oni220-ge.../index.htm#toc http://www.scribd.com/doc/23575323/A...ype-Vii-U-Boat Thanks to: - Lurker_HLB3 and all the other contributors for creating Operation Monsun - skwasjer for S3D Silent 3ditor - JSCones for JSGME Gute Jagd Kaleuns Last edited by G7eT2; 10-20-13 at 01:14 AM.