Empirically. I got my hands on a piece and measured the density myself. It's roughly 430 kg/m^3.

Still have a box full of the damn stuff, actually, just in case someone can figure out any half-sensible way to translate the other properties into something DF uses.

Hmm, I think I remember coming across the material properties thread a long time ago.

Wow that was some data gathering. It's kinda strange to think that along with DF you can get a dataset with the properties of various real world materials.

Part of it was crowdsourced to my fellow forumites, but a lot of that thread was just me, Google & Wolfram Alpha. You could probably still find it buried somewhere on the suggestions forum with that giant table of materials, material properties & sources.

Oh I did.

Incidentally, do you remember user Martin? The guy who made the original Morul?

Yes, not to mention many of the other forumites. Though I haven't been active over there for a while now.

Theres a really interesting thread on the way bolts and armor interact, I don't know if you caught it.

No, but I would like to read that. Link?

Here is the thread where the initial !!Science!! on whether bolt weight made an impact on their lethality - [Dwarven Research: The Effect of Bolt Weight on Crossbow Performance](http://www.bay12forums.com/smf/index.php?topic=115683.0)

The results were converted on reddit into a LaTeX PDF, which is excellent reading - http://dl.dropbox.com/u/2891221/DF%20study.pdf

This led to the follow up: A Comparison Study on the Effectiveness of Bolts vs Armors

LaTeX - http://dl.dropbox.com/u/2891221/DF%20study%202.pdf

Thread - http://www.bay12forums.com/smf/index.php?topic=116151.0

Fascinating reading, thanks.