Realism- and gameplay-related hardcode fixes for SH3.EXE

Originally Posted by Philipp_Thomsen

What I find weird is that seems to be wrong, mathematically.

Suppose the ship max speed was 20 kts: All ahead 2/3 would give you around 7 kts, which is basically one-third of the max speed. Two-thirds would be 66%, or 14kts.

That might be a correct assumption IF the drag factor of the Sub was
100% as efficient at every speed.

But as you increase speed?
You increase the water flowing by and that increases the drag factor.
So 2/3 to Full Ahead should be less an increase then
1/3 to half.

[Philipp_Thomsen]

Originally Posted by privateer

That might be a correct assumption IF the drag factor of the Sub was
100% as efficient at every speed.

But as you increase speed?
You increase the water flowing by and that increases the drag factor.
So 2/3 to Full Ahead should be less an increase then
1/3 to half.

Wakarimash!ta!

(! = i, subsim filter ruining my japanese)

[Sailor Steve]

As Privateer said. One ship I do know the numbers for - the Iowa class battleships. With all eight boilers and full power they were rated for 32 knots. Using four boilers (half speed) they could still make 30 knots. There is an optimum speed for every vehicle, and once you've reached it adding more and more power has less and less effect. That's why a 3000-pound sedan making 200 horsepower can go 100 mph or more, and a 1200-pound Grand Prix car making 1000 horsepower can only go twice as fast.

Here is a great explanation of how it works:
http://www.navweaps.com/index_tech/tech-029.htm

And an explanation of why the 50-knot nuclear carrier is a myth:
http://www.navweaps.com/index_tech/tech-028.htm

[Philipp_Thomsen]

Well, thats just bullsh!t.

My uboat on sh3, after refitting, reaches 37 kts.

[h.sie]

good news: i was able to continuously trigger the blur effect for the periscope camera views. using this, i could simulate vibrations for speed above 4knots. doesn't really look like vibrations, but it makes peris almost useless for high speeds and surely is better than nothing.

If all works, V15D will contain:

- CO2 production/diving times considering repairs, silent hunting, crew size.
- speed reduction to 5 knots when snorkelling (currently without considering wind speed??)
- simulate periscopes vibrations for speed > 4knots

But that needs time.

[Sailor Steve]

Originally Posted by Philipp_Thomsen

My uboat on sh3, after refitting, reaches 37 kts.

I WANT ONE! Haven't been water-skiing in awhile.

[LGN1]

Originally Posted by h.sie

good news: i was able to continuously trigger the blur effect for the periscope camera views. using this, i could simulate vibrations for speed above 4knots. doesn't really look like vibrations, but it makes peris almost useless for high speeds and surely is better than nothing.

If all works, V15D will contain:

- CO2 production/diving times considering repairs, silent hunting, crew size.
- speed reduction to 5 knots when snorkelling (currently without considering wind speed??)
- simulate periscopes vibrations for speed > 4knots

But that needs time.

Great news, h.sie Impressive work! Again, this will add a lot to realism!

Concerning snorkeling: I read that you could snorkel up to a sea state of 3-4. According to what I read, this corresponds to a wave height of 1.25 - 2.5 m. Maybe a max. windspeed between 8 and 10 m/s for snorkeling would be fine in game

So, wind speed =< 10 m/s: snorkeling possible at 5 kn (no max. speed changes below wind speed 10m/s)
Wind speed > than 10 m/s: no snorkeling possible.

Cheers, LGN1

[Philipp_Thomsen]

The snorkelling speed in my opinion depends on the depth of the sub.

I think snorkelling on heavier waters would be possible by decreasing the depth of the submarine. Lets say 10 meters, just enough to cover the conning tower.

That would also allow higher uboat speeds, due to the less water pressure on the snorkel mast.

[h.sie]

@LGN1: Thanks again for doing some research. I'll see what I can do.

@PT: I think you are right, the higher the end of the snorkel, the better it can suck in the air, even in higher waves. but the geometries of the 4 boat types and their snorkels differ and it would take a huge amount of effort to consider that point in an exact way. The required assembler code would grow and grow and I would lose overview. So I must admit that I can only do simple fixes, which hopefully anyhow give a better approximation of the reality than stock sh3.exe does.

[ryanwigginton]

"- simulate periscopes vibrations for speed > 4knots" Awesome!

[slipper]

Hi all,

I have been following this post with interest but i can not install the V15C patch to try it. I have searched through the posts, but must admit i find it all a bit confusing.

I installed the original game with SH3.exe file version 1.0.0.1. but according to the install instructions on the first page of this discussion, i need file version 1.0.4.1.

i cannot install the patch as i get the wrong checksum, so my question is how do i proceed? does that mean there is no way for me to run this patch with a legal copy of the game? is there any workaround i can do to make the patcher work with file version 1.0.0.1?

Thanks for any replies and help.

regards

a very confused slipper

[ryanwigginton]

Try installing this patch first...
http://forums.ubi.com/eve/forums/a/t...2/m/7261080164

Hope this helps!

[slipper]

Thanks for reply

but on first page of discussion it say's to try on an unpatched game? Is this not correct?

regards

slipper

[Philipp_Thomsen]

Originally Posted by slipper

Thanks for reply

but on first page of discussion it say's to try on an unpatched game? Is this not correct?

regards

slipper

You're supposed to have/buy the starforce-free version of the game already patched to 1.4b.

[slipper]

Thanks again for reply. I don't have that version. There is nothing i can do other than rebuy the game then?

regards

slipper