View Single Post
Old 09-26-2017, 07:18 PM   #52
mlangsdorf
 
Join Date: Aug 2004
Location: Austin, TX
Default Re: GURPS ULTRATECH ballistics?

Quote:
Originally Posted by hal View Post
Note: this does not calculate Weapon Accuracy based on barrel length, nor unconsumed propellants or what have you. All it does is give you damage, half/damage range, and Max Damage range.
So I have a slightly more advanced/crazy spreadsheet here:
https://docs.google.com/spreadsheets...it?usp=sharing

which is a mix of Doug's spreadsheet, GURPS Vehicles (2nd ed) for 3e, and 3G3, with a dash of whatever data I can get off the web. It will give weapon damage, accuracy, weight, weight per shot, and costs. It's usually accurate to within +/-20%, except for cost, which is generally a best guess. Not all stats will match GURPS stats, either.

One big friction point is Doug's calculator uses chamber pressure, chamber volume, and burn distance to calculate kinetic energy, and for a lot of historic and imaginary guns, its hard/impossible to get those values. I'm using modified 3G3 propellant energy to estimate those values, but the 3G3 formula for estimating barrel length is extremely bogus. Anyway, I'm sticking it out there for people to look at.

Quote:
What might prove to be interesting is to see if the GGG rules (now called 3G3 if you buy the PDF version) can create a credible Caseless Round and stats for it, such that I might be willing to compare/contrast it against ULTRATECH's values. Might prove to be interesting.
In principle, 3G3 can create caseless rounds/weapons, and a caseless round should do the same amount of damage as a cased weapon with the same weight, cross-section, and muzzle velocity.
__________________
Read my GURPS blog: http://noschoolgrognard.blogspot.com
mlangsdorf is offline   Reply With Quote