/ flammenschwert (aus) can be crafted with the following recipes

Player Recipe
Obsolete
Primary skill used: (0)
Required skills: N/A
Time to complete: 0 seconds
Byproducts:
(none)

Player Recipe
crazycataclysm Primary skill used: mechanics(5)
Required skills: N/A
Time to complete: 30 minutes
Tools required:
> 1 tool with glare protection quality of 2
> arc welder (20 charges) OR makeshift arc welder (30 charges) OR integrated toolset (30 charges) OR acetylene torch (4 charges)
Components required:
> 5x leather patch
> 1x pipe
> 1x zweihänder
> 1x pilot light
> 1x small pressurized fuel tank
Byproducts:
(none)
--
This recipe can be found in the following books when mechanics is at least the required level:
Welding and Metallurgy (level 8)
Internal Combustion Fundamentals (level 4)