RE: Fletcher class DD armored??

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RE: Fletcher class DD armored??

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RE: Fletcher class DD armored?? - 12/21/2010 3:57:03 PM

JWE

Posts: 6580
Joined: 7/19/2005
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quote:

ORIGINAL: Yakface
Could 18mm of plate really stop a 5" shell?

No. It doesn't.

Define a meaningful test.
6 identical TFs each with 6 identical Asashios, facing;
6 identical TFs each with 3 identical Fletchers and 3 identical Bensons;
Each side�s TFs spaced apart by 5 hexes in �x� and each side is displaced from the other by 5 hexes in �y�;
Each side�s index TF meets its opponent in the middle;
Weather clear, daylight, open ocean;
Engagement ranges between 8000 and 17000 yards;
Evaluate damage for each ship vs number of hits taken by the ship;
Determine average amount of damage (Sys, Flt, Eng) inflicted per hit;
Run the test 6 times, in order to obtain 36 engagement results for identically constituted engagements;
Since all parameters are identical, apply statistical analysis to the results.
.Sys ... Flt .... Eng - Fletcher
7.80 - 3.01 - 1.89 - Mean
3.36 - 1.10 - 1.26 - Sigma
2.40 - 0.78 - 0.91 - Deviation
1.01 - 0.03 - 1.45 - Skewness

.Sys ... Flt .... Eng - Benson
7.91 - 2.91 - 1.95 - Mean
3.76 - 1.24 - 1.36 - Sigma
2.52 - 0.94 - 1.01 - Deviation
0.98 - 0.16 - 1.33 � Skewness

There is no difference in either the amount, type, or degree of damage taken by an �armored� Fletcher verses an �unarmored� Benson, against an identical array of Japanese DD guns. In fact, looking at FltDam (where belt �armor� should have an impact) the skewness is small, indicating a near �normal� distribution, with Fletchers and Bensons having damn near identical responses to a Japanese DD gun hitting the hull.

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Post #: 31

RE: Fletcher class DD armored?? - 12/21/2010 6:29:18 PM

Tijanski

Posts: 30
Joined: 11/24/2010
Status: offline

Horray!!! That is what I like about this forum. Every now and then somebody who knows what they are talking about makes an answer and makes it clear for the regular people to work with.

(in reply to JWE)

Post #: 32

RE: Fletcher class DD armored?? - 12/22/2010 1:10:19 AM

stuman

Posts: 3907
Joined: 9/14/2008
From: Elvis' Hometown
Status: offline

quote:

ORIGINAL: Tijanski

Horray!!! That is what I like about this forum. Every now and then somebody who knows what they are talking about makes an answer and makes it clear for the regular people to work with.

I have found him to be good at that

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Post #: 33

RE: Fletcher class DD armored?? - 12/24/2010 7:44:03 AM

Yakface

Posts: 846
Joined: 8/5/2006
Status: offline

quote:

ORIGINAL: JWE

quote:

ORIGINAL: Yakface
Could 18mm of plate really stop a 5" shell?

No. It doesn't.

Define a meaningful test.
6 identical TFs each with 6 identical Asashios, facing;
6 identical TFs each with 3 identical Fletchers and 3 identical Bensons;
Each side�s TFs spaced apart by 5 hexes in �x� and each side is displaced from the other by 5 hexes in �y�;
Each side�s index TF meets its opponent in the middle;
Weather clear, daylight, open ocean;
Engagement ranges between 8000 and 17000 yards;
Evaluate damage for each ship vs number of hits taken by the ship;
Determine average amount of damage (Sys, Flt, Eng) inflicted per hit;
Run the test 6 times, in order to obtain 36 engagement results for identically constituted engagements;
Since all parameters are identical, apply statistical analysis to the results.
.Sys ... Flt .... Eng - Fletcher
7.80 - 3.01 - 1.89 - Mean
3.36 - 1.10 - 1.26 - Sigma
2.40 - 0.78 - 0.91 - Deviation
1.01 - 0.03 - 1.45 - Skewness

.Sys ... Flt .... Eng - Benson
7.91 - 2.91 - 1.95 - Mean
3.76 - 1.24 - 1.36 - Sigma
2.52 - 0.94 - 1.01 - Deviation
0.98 - 0.16 - 1.33 � Skewness

There is no difference in either the amount, type, or degree of damage taken by an �armored� Fletcher verses an �unarmored� Benson, against an identical array of Japanese DD guns. In fact, looking at FltDam (where belt �armor� should have an impact) the skewness is small, indicating a near �normal� distribution, with Fletchers and Bensons having damn near identical responses to a Japanese DD gun hitting the hull.

So from the test it appears the original post:

"It seems this give them some sort of invunerability in battles vs. japanese DDs. Japanese DD guns are unable to penetrate either deck armour or belt armour of fletcher. In fact, they can not sink them at all unles they hit them with torpedo"

is just plain wrong?

(in reply to JWE)

Post #: 34

RE: Fletcher class DD armored?? - 12/24/2010 8:37:44 AM

d0mbo

Posts: 592
Joined: 8/21/2009
From: Holland
Status: offline

It appears so.

(in reply to Yakface)

Post #: 35

RE: Fletcher class DD armored?? - 12/24/2010 8:48:04 AM

Sredni

Posts: 705
Joined: 9/30/2004
From: Canada
Status: offline

It would be interesting to see the japanese DD's results from that test.