Layered DR and Armor Divisor

Erling · 07-02-2016, 03:04 PM

Let's assume we have a helm with DR 46 which protects face and skull. Also skull has DR 2.

Helm was shot by a bullet with Armor Divisor (2). Also shooter targeted chinks in armor, thus total effective Armor Divisor raises to (4) (as Kromm mentioned, ADs from difference sources stack multiplicatively).

How to calculate effective DR?

Variant #1

46/4 (round down) = 11
2/4 (round down) = 0
Total = 11 + 0 = 11

Variant #2

(46+2)/4 (round down) = 12
Total = 12

I suppose Variant #2 is correct. It that right?

Culture20 · 07-02-2016, 03:24 PM

The skull doesn't have chinks, so I'd keep the AD for the skull DR as 2.
Variant #3:
46/4 (round down) = 11
2/2 = 1
Total = 11 + 1 = 12

I would also do this for layered armor, since you can only see the chinks on the outermost layer.

Erling · 07-02-2016, 03:30 PM

Quote:

Originally Posted by Culture20

The skull doesn't have chinks, so I'd keep the AD for the skull DR as 2.
Variant #3:
46/4 (round down) = 11
2/2 = 1
Total = 11 + 1 = 12

I would also do this for layered armor, since you can only see the chinks on the outermost layer.

Shame on me, I noticed that before, but forgot to mention it. Looks like you're right.

khorboth · 07-03-2016, 08:14 AM

Additionally, unless the top layer is transparent, I would probably not let someone target a chink in the lower layer. Even then, I'd probably stack the penalties. Finding a spot that's a chink in both layers and lining up that shot is just short of impossible.

Varyon · 07-05-2016, 11:10 AM

B268, when discussing Armor Divisors, states "Divide the target's DR from armor or other sources" (emphasis mine). That indicates to me that you are to take the character's entire DR, regardless of source, and do the division. Thus, someone with natural DR 3 wearing DR 6 plate over DR 3 leather has overall DR 11. Against an attack with Armor Divisor (4), this becomes DR 3, not DR 0+1+0.

Chinks may not be all that unlikely to line up - the fact the character doesn't need to study the armor or make an Armoury roll or whatever certainly implies this. However, natural DR lacks Chinks (IIRC, although a case could be made for treating the temple as such on the Skull), as does flexible armor (LT101), so you're rather unlikely to have this actually show up in play.

Harald387 · 07-05-2016, 11:40 AM

I'd certainly argue that even if you allow chinks in skull DR (the temples are an obvious choice) that in most cases, artificial DR (armor) layered over natural DR (the skull) does not have chinks that line up for both places; a helmet that left a weak point over the temples would certainly be kind of hard to market to potential wearers!

07-03-2016, 08:14 AM	#4
khorboth Join Date: Aug 2007 Location: Denver, CO	Re: Layered DR and Armor Divisor Additionally, unless the top layer is transparent, I would probably not let someone target a chink in the lower layer. Even then, I'd probably stack the penalties. Finding a spot that's a chink in both layers and lining up that shot is just short of impossible.

07-05-2016, 11:10 AM	#5
Varyon Join Date: Jun 2013	Re: Layered DR and Armor Divisor B268, when discussing Armor Divisors, states "Divide the target's DR from armor or other sources" (emphasis mine). That indicates to me that you are to take the character's entire DR, regardless of source, and do the division. Thus, someone with natural DR 3 wearing DR 6 plate over DR 3 leather has overall DR 11. Against an attack with Armor Divisor (4), this becomes DR 3, not DR 0+1+0. Chinks may not be all that unlikely to line up - the fact the character doesn't need to study the armor or make an Armoury roll or whatever certainly implies this. However, natural DR lacks Chinks (IIRC, although a case could be made for treating the temple as such on the Skull), as does flexible armor (LT101), so you're rather unlikely to have this actually show up in play.

07-05-2016, 11:40 AM	#6
Harald387 Join Date: Apr 2007 Location: Ottawa, ON, CA	Re: Layered DR and Armor Divisor I'd certainly argue that even if you allow chinks in skull DR (the temples are an obvious choice) that in most cases, artificial DR (armor) layered over natural DR (the skull) does not have chinks that line up for both places; a helmet that left a weak point over the temples would certainly be kind of hard to market to potential wearers!

07-02-2016, 03:04 PM	#1
Erling Join Date: Sep 2014	Layered DR and Armor Divisor Let's assume we have a helm with DR 46 which protects face and skull. Also skull has DR 2. Helm was shot by a bullet with Armor Divisor (2). Also shooter targeted chinks in armor, thus total effective Armor Divisor raises to (4) (as Kromm mentioned, ADs from difference sources stack multiplicatively). How to calculate effective DR? Variant #1 46/4 (round down) = 11 2/4 (round down) = 0 Total = 11 + 0 = 11 Variant #2 (46+2)/4 (round down) = 12 Total = 12 I suppose Variant #2 is correct. It that right? __________________ When in deadly danger, When beset by doubt, Run in little circles, Wave your arms and shout.

07-02-2016, 03:24 PM	#2
Culture20 Join Date: Feb 2014	Re: Layered DR and Armor Divisor The skull doesn't have chinks, so I'd keep the AD for the skull DR as 2. Variant #3: 46/4 (round down) = 11 2/2 = 1 Total = 11 + 1 = 12 I would also do this for layered armor, since you can only see the chinks on the outermost layer.