09-10-2012, 04:26 PM | #1 |
Join Date: Aug 2007
Location: Boston, Hub of the Universe!
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[HT][UT] The SM of guns
So for the purposes of adding armor or stealth features (mainly from UT), what is the SM of a gun?
Obviously this depends on it's weight, whether it's a longarm or a pistol or a rocket launcher, etc. But does anyone have a rule of thumb or a rough formula?
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Demi Benson |
09-10-2012, 05:02 PM | #2 | |
Wielder of Smart Pants
Join Date: Aug 2004
Location: Ventura CA
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Re: [HT][UT] The SM of guns
Mass based SMs is just a rule-of-convenience for Spaceships. Size Modifier for weapons uses the rule on B400
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09-10-2012, 05:08 PM | #3 |
Join Date: Nov 2009
Location: Oregon
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Re: [HT][UT] The SM of guns
I suspect that there's some correlation between a weapon's Bulk and its SM, but it's not immediately obvious what that is. Based on the Blaster & Laser Design article from Pyramid 3/37, Bulk is derived from the square root of weight, modified for the configuration (rifle/cannon, pistol, holdout), maxing out at Bulk -10. SM is based on the longest linear dimension, and thus corresponds roughly to the cube root of weight for creatures and vehicles; this may not hold true for weapons in the hand-held range.
Per the article, Holdout guns range from Bulk 0 (<0.25lb) to -1 (1 lb), Pistols are -1 (≤1 lb) to -3 (4 lb), Rifles are -3 (5 lb) to -6 (15 lb), and Cannons are -6 to -10. Based on weight alone, 16 lb is SM -2 (10 HP), 5 lb is SM -3 (7 HP), 2 lb is SM -4 (5 HP) and a 1/2 lb is SM -5 (3 HP). I suppose you could say that SM is roughly 0.5 * (10 + Bulk), rounded down. It would be more precise to calculate from the weight of the individual gun, and even more precise if you know it's actual length (which is the case with everything in HT, but generally not in UT). |
09-11-2012, 11:04 AM | #4 | |
Join Date: Aug 2007
Location: Boston, Hub of the Universe!
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Re: [HT][UT] The SM of guns
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And the bit on B400 doesn't actually say what the size modifier is. If you go by the size of people's body parts to determine to-hit penalties, they don't match all the ones in the handy charts and tables. e.g. my torso is only 26 inches tall (which, IIRC, should be SM-3), but still considered a SM0 target, which gets no penalty to hit. Hence my original question.
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Demi Benson |
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09-11-2012, 11:07 AM | #5 | |
Join Date: Aug 2007
Location: Boston, Hub of the Universe!
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Re: [HT][UT] The SM of guns
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Demi Benson |
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09-13-2012, 07:12 PM | #6 |
Wielder of Smart Pants
Join Date: Aug 2004
Location: Ventura CA
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Re: [HT][UT] The SM of guns
It is just a rule for Spaceships. SM is otherwise based only on size. That 2000 pound cannon and a full scale papier-mâché copy of it will have the same Size Modifier, mass has nothing to do with it.
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guns, size modifier |
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