French C19th mitrailleuse

[Tomsdad]

Originally Posted by Sam Baughn

According to Wikipedia, the Reffye mitrailleuse shot a 13 mm 50 gram bullet at 480 meters per second. That's a kinetic energy of 5,760 Joules.

My simplified version of the gun damage formula is:

( (a^(1/2)) / (b)^(1/3) ) × c = d

Where a is kinetic energy in Joules, b is bullet diameter in mm, c is the arbitrary constant 0.23, and d is damage in dice.

That says it should do 7d+1 pi+. Using the more complicated equation from Interior and Terminal Ballistics for GURPS, I think it is slightly higher, around 7d+3 pi+. Either way, it's a lot of damage for the time.

Cheers

That would match the background, and would make the idea of multiple ball cartridge work well as well.

Sorry did you get a 1/2d range at all?

Cheers again

TD

[Sam Baughn]

Originally Posted by Tomsdad

Sorry did you get a 1/2d range at all?

I don't have a handy formula for that, but GURPS Vehicles for 3rd edition says a 13 mm gun with a medium barrel (consistent with the damage) should have a range of 507/3,200, which looks plausible to me.

[Tomsdad]

Originally Posted by Sam Baughn

I don't have a handy formula for that, but GURPS Vehicles for 3rd edition says a 13 mm gun with a medium barrel (consistent with the damage) should have a range of 507/3,200, which looks plausible to me.

cheers

TD