Your NEZ radius estimations

[Gorshkov]

Will you give me your best NEZ radius estimations (in nautical miles) for two basic target categories:

- diesel sub or civilian ship (max. escape velocity is 15-17 kts)
- nuclear sub or surface warship (max. escape velocity is 33-36 kts)

if I use the following torpedoes: ADCAP, UGST, USET-80, TEST-71M and 53-65K fired at their respective maximum speeds.

Let's assume we are playing in DW 1.04 with LWAMI 3.08 mod.

[Chock]

The book figures would say the target at 36 knots should be hit if it is within two nautical miles when you fire a torpedo which travels at 40 knots, assuming the target is already at 36 knots heading directly away from you the moment you fire, and it's a perfect tailchase, and it doesn't get successfully decoyed. (2.003 nautical miles to be exact, if we believe the known stats on the range of a modern 40 knot torpedo are accurate, which they probably aren't). That's disregarding blast radius and the torpedo's initial accelerating time too.

:D Chock

[jmr]

I downloaded an Excel file that has no escape ranges for each torpedo versus a specific target. Can't remember where I got it but I can send it to you if you'd like.


Here's a formula for you:


A 55 kt torpedo covers 27 nm in about 30 minutes.
A 30 kt target can go 15 nm in the same amount of time.
Thus, if the target is more than 12 nm away at time of torpedo launch, then it can conceivably escape (12 nm = 27 nm - 15 nm).

"No escape range" = Torpedo max range - (Torpedo max range / Torpedo speed) * Target max speed

From ZeroGreat

Max firing range = Torp range * ( 1 - ( Target speed / Torpedo speed))

http://www.commanders-academy.com/forum/showthread.php?t=3960

[Molon Labe]

I downloaded an Excel file that has no escape ranges for each torpedo versus a specific target. Can't remember where I got it but I can send it to you if you'd like.
Might have been the one I posted at CADC: http://www.commanders-academy.com/forum/attachment.php?attachmentid=136&d=1190658378

[jmr]

Yup that's it! Very handy indeed.

[Molon Labe]

Glad to be of help. :D

[SeaQueen]

Will you give me your best NEZ radius estimations (in nautical miles)..

In fairness, the idea of a No-Escape Zone has a lot of limitations. It theoretically excludes the possibility of the target outrunning your torpedo. In practice, though you need to be aware of some details. You need to be careful when you make the calculation to use the torpedo's average speed. If the torpedo activates way early or you're shooting a SNAPSHOT, the decrease in average speed can be substantial enough to result in a noticable decrease in "no escape range." The result of that is you might fire at what you think is the "no escape range," and have a target escape. I've found that the NEZ calculation is most useful when you have the targets range fairly well determined and you plan to use a circle search torpedo. Wakehomers are difficult to estimate the average speed of because they seem to behave like random walkers.

Also, an interesting result of the same logic is that if they lack the capability of detecting the launch, you can often have the opposite effect and get an aspect dependent range bonus. I've found that this effect is particularly important for slower, shorter ranged torpedoes, because with it you can actually get some useful range.

[Gorshkov]

Thanks guys!

Where can I get this Excel worksheet because I can't enter above Molon's link? Is registration in CADC forum necessary?

[Gorshkov]

Here you are, this is a good graphic plot showing NEZ radius verus target speed for the most frequently used torpedoes in DW 1.04 with LWAMI 3.08 mod:

http://img223.imageshack.us/img223/5043/torpsxy9.jpg (http://imageshack.us)

[Dr.Sid]

This is very very good ! I miss chinese wakehomers since they are main weapon for chinese kilo, and you use tham against fast surface ships. You could also show target speed up to 0, so asolute torpedo range would too be shown in the graph.

[Gorshkov]

Here you are, according to your wishes!

http://img158.imageshack.us/img158/6362/torpsmq6.th.jpg (http://img158.imageshack.us/my.php?image=torpsmq6.jpg)

Later I'll think about similar charts covered plyable lightweight ASW torpedoes: UMGT-1, MPT-1UE, APR-3, Mk-46, Mk-50, Mk-54.
Please give me their ranges and maximum velocities to be able to check my own data first.

[Dr.Sid]

Thank you very much :arrgh!:

[Gorshkov]

Here you are, this chart presents NEZ radius for all playable lightweight torpedoes and "Squall" underwater missile.

http://img222.imageshack.us/img222/993/aswtorpkb9.th.jpg (http://img222.imageshack.us/my.php?image=aswtorpkb9.jpg)

Note that "Squall" velocity of 200 kts wasn't chosen randomly! It assures NEZ drop is about a half nautical mile or 10% between typical target's escape speeds of 15-35 kts! Every conventional torpedo decreases its NEZ radius for 60%-75% in that situation!

[Gorshkov]

I have also compiled similar charts for most widely used German WW2 torpedoes. Of course just for fun because at those days their performance was completely sufficient targeting slow merchants at 2 km practical maximum distance.

However you can look at enormous progress in torpedo's propulsion technology in the last fifty years!

http://img87.imageshack.us/img87/8493/germtorpsbs2.th.png (http://img66.imageshack.us/my.php?image=germtorpsmb4.jpg)

[Dr.Sid]

Just a short note .. such pictures with low color count and shart transtitions are better stored in gif or png. :up:

[Gorshkov]

Just a short note .. such pictures with low color count and shart transtitions are better stored in gif or png. :up:

Corrected!