SUBSIM Radio Room Forums - View Single Post - Correction of torpedo damage power in SH4

Gorshkov · 11-22-08, 10:08 AM

OK, below I list my proposition of new HP values for all torps based on Keltros formulas and my historic and technical data with short comments:

1. US torps:

- Mk-27 = 20-31 HP - I am not sure this torp is useful with such small damage power...any comments?

- Mk-10 = 67-107 HP - this torp had 225 kg TNT warhead but note I scaled it to Torpex value of 150 kg and that is why HP are much lower now. Thus S-class skippers won't be so successful now!

- Mk-14 and Mk-23 = 130-210 HP - basically identical toprs and thus the same HP settings. I think their Keltrose's HP estimate is right.

- Mk-16 = 191-307 HP - because of 50% more powerful warhead

- Mk-18 = 115-188 HP - as technical data suggest this torp had slightly lower warhead's weight than contemporary US wet-heaters what I introduced here. Now there is less HPs in exchange for wake-less capability.

2. German torps - I divided them into two categories: acoustic and unguided torps because background data are very different referring to both classes. Moreover I do not find any info that FAT/LUT models had noticeably lower warhead weights. Also I assume that both Torpex and Hexanite have identical explosive power which may be slighty unrealistic. So there are my estimates:

- T-I/II/III/VII (also all FAT/LUT versions) 178-287 HP - data I possess state that during the war these torps warhead's weight increased from 280 to 430 kg. Unfortunately I do not have data about their specific weight annually. So I had to do a sort of linear estimation here and assumed this mass was increasing by 25 kg a year. Later I decided to choose 1943 values as most appropriate for SH-4/UBM game. That is why I this in this year warhead's weight was 380 kg which reflects above HP value.

- T-IV/V/XI - 106-171 HP - all data I saw suggest warhead's weight was in 200-278 kg range. So I can assume situation similar to unguided torps which means constant increasing of warhead's mass yet limited by space needed for passive homing device. Therefore I set 239 kg kg for 1943-1945 time period based on identical linear estimation as before. This way we get less power for homing capability. Of course we can adjust these value separately for each acoustic torp basing on their IOC, say: T-IV (early 1943 - 200 kg), T-V (late 1943 - 239 kg), T-XI (never deployed but suppose for game purposes 1945 - 278 kg).

Note I still retained stock AP and RMin-RMax values! No I must test this settings a bit.

11-22-08, 10:08 AM	#15
Gorshkov Commodore Join Date: Mar 2007 Posts: 604 Downloads: 139 Uploads: 0	OK, below I list my proposition of new HP values for all torps based on Keltros formulas and my historic and technical data with short comments: 1. US torps: - Mk-27 = 20-31 HP - I am not sure this torp is useful with such small damage power...any comments? - Mk-10 = 67-107 HP - this torp had 225 kg TNT warhead but note I scaled it to Torpex value of 150 kg and that is why HP are much lower now. Thus S-class skippers won't be so successful now! - Mk-14 and Mk-23 = 130-210 HP - basically identical toprs and thus the same HP settings. I think their Keltrose's HP estimate is right. - Mk-16 = 191-307 HP - because of 50% more powerful warhead - Mk-18 = 115-188 HP - as technical data suggest this torp had slightly lower warhead's weight than contemporary US wet-heaters what I introduced here. Now there is less HPs in exchange for wake-less capability. 2. German torps - I divided them into two categories: acoustic and unguided torps because background data are very different referring to both classes. Moreover I do not find any info that FAT/LUT models had noticeably lower warhead weights. Also I assume that both Torpex and Hexanite have identical explosive power which may be slighty unrealistic. So there are my estimates: - T-I/II/III/VII (also all FAT/LUT versions) 178-287 HP - data I possess state that during the war these torps warhead's weight increased from 280 to 430 kg. Unfortunately I do not have data about their specific weight annually. So I had to do a sort of linear estimation here and assumed this mass was increasing by 25 kg a year. Later I decided to choose 1943 values as most appropriate for SH-4/UBM game. That is why I this in this year warhead's weight was 380 kg which reflects above HP value. - T-IV/V/XI - 106-171 HP - all data I saw suggest warhead's weight was in 200-278 kg range. So I can assume situation similar to unguided torps which means constant increasing of warhead's mass yet limited by space needed for passive homing device. Therefore I set 239 kg kg for 1943-1945 time period based on identical linear estimation as before. This way we get less power for homing capability. Of course we can adjust these value separately for each acoustic torp basing on their IOC, say: T-IV (early 1943 - 200 kg), T-V (late 1943 - 239 kg), T-XI (never deployed but suppose for game purposes 1945 - 278 kg). Note I still retained stock AP and RMin-RMax values! No I must test this settings a bit. Last edited by Gorshkov; 11-22-08 at 10:38 AM.