07-17-2012, 07:34 AM | #1 |
Join Date: Sep 2004
Location: Canada
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Additional materials for The Deadly Spring
I have a weirdly happy relationship with tables of material properties. For interested parties, I've dug up the properties for a few more materials for the Deadly Spring "Materials Lists Pounds" tab on the Deadly Spring spreadsheet. They're probably most useful for folks to base fantasy materials on, but it's interesting anyways.
Obviously Essential Yew and Giant Spider Silk are fantasy materials - I based them on real Yew and real Spider Silk under the theory that Essential materials are "three times as good" and I arbitrarily called Giant Spider Silk "Essential Spider Silk" because whadayagonnado. The CODE tag seems to be preserving tabs, so you should be able to just insert these into your spreadsheet. Code:
Common name Density (lbs/in3) Tensile St (psi) Elastic Modulus (psi) Max Strain A Bow Cost/lb Arrow Cost/lb Bone (Antler) 0.067 27,267 2,480,145 1.10% 1.02 $45 $5.1 Bone (Cattle Femur, fresh) 0.072 15,664 2,567,168 0.61% 1.03 $13 $5 Essential Yew 0.029 135,000 3,960,000 3.41% 1.20 $1598 $19.1 Ivory (Indian Elephant) 0.061 15,954 1,812,972 0.88% 1.07 $23 $4.1 Silk (Silkworm) 0.048 37,710 1,435,874 2.63% 1.07 $615 $12.3 Silk (Spider) 0.040 26,107 4,931,283 0.53% 0.64 $1750 $865 Silk (Giant Spider) 0.079 130,534 14,793,849 0.88% 0.46 $7250 $1295
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07-17-2012, 01:36 PM | #2 | |
Doctor of GURPS Ballistics
Join Date: Sep 2004
Location: Lakeville, MN
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Re: Additional materials for The Deadly Spring
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07-17-2012, 02:28 PM | #3 |
Join Date: Aug 2007
Location: Vermont, USA
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Re: Additional materials for The Deadly Spring
For forum readability and discussion:
Code:
Common name Density Tensile St Elastic Modulus Max Strain A Bow Cost/lb Arrow Cost/lb (lbs/in3) (psi) (psi) Bone (Antler) 0.067 27,267 2,480,145 1.10% 1.02 $45 $5.10 Bone (Cattle Femur, fresh) 0.072 15,664 2,567,168 0.61% 1.03 $13 $5 Essential Yew 0.029 135,000 3,960,000 3.41% 1.20 $1,598 $19.10 Ivory (Indian Elephant) 0.061 15,954 1,812,972 0.88% 1.07 $23 $4.10 Silk (Silkworm) 0.048 37,710 1,435,874 2.63% 1.07 $615 $12.30 Silk (Spider) 0.040 26,107 4,931,283 0.53% 0.64 $1,750 $865 Silk (Giant Spider) 0.079 130,534 14,793,849 0.88% 0.46 $7,250 $1,295 |
07-17-2012, 02:32 PM | #4 |
Untagged
Join Date: Oct 2004
Location: Forest Grove, Beaverton, Oregon
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Re: Additional materials for The Deadly Spring
Thank you Munin for cracking the nut so I can get to the meatiness of Bruno's post. :)
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07-18-2012, 06:56 AM | #5 |
Join Date: Sep 2004
Location: Canada
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Re: Additional materials for The Deadly Spring
Eheh. Sorry, the forum's just not a good format for table transport.
It started with making up numbers for "Essential wood", but seeing a picture of a sort of ridiculous-looking fantasy-bow made out of deer antlers sent me kiting off on a side quest. By the numbers, antler makes an excellent heavy (non-metalic) war arrow for high ST archers, incidentally. Assuming you can find antlers long and straight enough for arrows :D I'm figuring the cattle femurs are a good base for making up "dragonbone" for bone/crossbow material, although the result I suspect will be so stiff it won't be good for anything except arrows and risers/stocks. Unfortunately I couldn't find a study on dried bone that had all the numbers I wanted, just on fresh. Fresh bone would be more elastic, I suspect. Silk seemed like an interesting alternative to sinew for composite material, and it turns out it's not too hard to find stats on spidersilk, with all the materials research going on with it. Note that while there's an arrow cost for each material, it makes no more sense to make arrows out of giant spider silk than it does out of sinew :)
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All about Size Modifier; Unified Hit Location Table A Wiki for my F2F Group A neglected GURPS blog |
07-18-2012, 08:27 PM | #6 | |
Join Date: Aug 2010
Location: The Land of Enchantment
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Re: Additional materials for The Deadly Spring
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And, yes, backing bows with silk instead of sinew is also historical. |
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07-19-2012, 02:15 AM | #7 |
Join Date: Aug 2004
Location: Hessen
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Re: Additional materials for The Deadly Spring
Ok,
and how do i use it in the excel-shet ? i can replace existing lines in the Materials Tab, but i cant find a way to expand the selection. MKS |
07-19-2012, 06:36 AM | #8 | |
Join Date: Sep 2004
Location: Canada
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Re: Additional materials for The Deadly Spring
I'm guessing you're new to excel? Actually, that was sort of mean of me to assume everyone using the spreadsheet is an excel supernerd, I know darn well most people hate the program *facepalm*
Quote:
Right click on the selected row, pick "Insert". It'll insert new blank cells for you.
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07-20-2012, 11:54 AM | #9 |
Join Date: Jan 2009
Location: Indaiatuba/SP Brazil
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Re: Additional materials for The Deadly Spring
Speaking of wierd materials or compositions or... whatever you guys are talking about, these days i've seen on youtube a dude who made a take down bow with skis! i really don't know how to even start to treat a bow like that... recurve competition bow? since it's glass fiber...
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07-20-2012, 12:10 PM | #10 | |
Wielder of Smart Pants
Join Date: Aug 2004
Location: Ventura CA
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Re: Additional materials for The Deadly Spring
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Tags |
bows, deadly spring, materials, pyramid 3/33 |
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