08-22-2012, 07:17 AM | #11 |
Join Date: Mar 2005
Location: Maitland, NSW, Australia
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Re: [HT] Body Armor - errata?
Yep. 1/3 less is a decent approximation. Though the few armour tests I've seen using titanium alloys suggest that it is worse at resisting weapons than the numbers would predict.
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08-22-2012, 07:29 AM | #12 | |
Doctor of GURPS Ballistics
Join Date: Sep 2004
Location: Lakeville, MN
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Re: [HT] Body Armor - errata?
Quote:
Good steels can easily be much, much harder, and thus resistant to "bite" (to use a non-scientific phrase) than Ti alloys, and this probably reduces the armor value somewhat.
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08-22-2012, 07:33 AM | #13 |
Join Date: Mar 2005
Location: Maitland, NSW, Australia
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Re: [HT] Body Armor - errata?
For Titanium armour I would probably reduce the weight by a third and reduce DR by 1 compared to steel armour.
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08-22-2012, 07:41 AM | #14 | |
Doctor of GURPS Ballistics
Join Date: Sep 2004
Location: Lakeville, MN
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Re: [HT] Body Armor - errata?
Quote:
"1/3 less weight of equivalent steel armor" is a fairly good approximation.
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08-22-2012, 07:59 AM | #15 | |
Join Date: Sep 2004
Location: Canada
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Re: [HT] Body Armor - errata?
Quote:
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08-22-2012, 08:11 AM | #16 |
Join Date: Feb 2006
Location: Not in your time zone:D
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Re: [HT] Body Armor - errata?
Thank you.
I have the errata entered on my pdf and hard-copy (1/3 OFF, not of:)) Then the silk vest insert may be the only new errata: it covers torso front, weighs 6lb and is DR5F; the corselet covers both front & rear, weighs 12lb but has DR10? Vest insert should either be about 3lb or about DR10F or the corselet only DR5:( DR10F for 6lb, or DR5F for 3lb, actually matches Low-tech values if the TL5 doubling is used. Not sure I fancy a DR5 corselet but that would be the undoubled value... Not errata but, also using doubled Low-tech values, the sentry Armor would seem to be more like DR22.
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08-22-2012, 09:37 AM | #17 |
Join Date: Oct 2005
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Re: [HT] Body Armor - errata?
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08-22-2012, 11:09 AM | #18 |
Night Watchman
Join Date: Oct 2010
Location: Cambridge, UK
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Re: [HT] Body Armor - errata?
The armour I know a little about is the kind that came in thick slabs on TL6 ships. The effectiveness of that approximately doubled during TL6 (as in, half the thickness was as good) mostly due to improved alloys and heat treatment.
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08-22-2012, 11:15 AM | #19 | |
Doctor of GURPS Ballistics
Join Date: Sep 2004
Location: Lakeville, MN
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Re: [HT] Body Armor - errata?
Quote:
So 60% the weight of equiv volume is a fact. The unknown is the protective value of an equivalent thickness. I found a source claiming substitution of Ti for steel half-inch plate achieved a 25% weight reduction for equiv ballisric protection with "early" Ti alloy. They claim without proof a 1-1 substitution is legit...which I dont buy. That suggests 25-40% weight reduction, with 33% being a centerpoint. Anywhere from a quarter to a third weight reduction is reasonable, though you will likely pay more the closer you get to a third. The 1-1 claim isnt credible cause steel development is far from stagnant either!
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08-22-2012, 12:05 PM | #20 |
Join Date: Oct 2004
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Re: [HT] Body Armor - errata?
That's why it's a WAG sort of thing. I we assume that the steel used is super awesome compared to the slag filled extremely skill intensive and often inherently flawed steel attempts from TL5- (which we have artifacts to support this, on average) and you'd get, as we did in HT, double Basic Set values. But, if on the other hand you assume every attempt at steel making is successful and producing exact perfect homogeneous and inerrant product (not possible at those tech levels, btw, which is why later steel processes are advances not only in price reduction by quality) then you get a different result. YMMV.
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armor, high tech, high-tech, low tech, low-tech |
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