Instead of using negative mass (which is now rejected), set your structural parts and fuel tanks to 0.0 mass. While a mass of absolute zero is still unrealistic, the current patch treats it more leniently than negative values, allowing you to create incredibly lightweight hulls. Multi-Stage Kinetic Missiles
If a custom-made nuclear bomb blueprint stopped working for you, it is likely due to game engine updates rather than an intentional patch. Weapon blueprints in SFS rely entirely on clever physics exploits or custom blueprint editing rather than built-in game mechanics. 💥 Why Your Nuke Blueprint Broke sfs nuke blueprint patched
SFS Nuke Blueprint Patched: The End of Spaceflight Simulator’s Most Destructive Glitch Instead of using negative mass (which is now
If your specific nuke blueprint is "patched" (i.e., it doesn't cause an explosion or won't load), it is likely because: Blueprint Editing | Spaceflight Simulator Wiki | Fandom Weapon blueprints in SFS rely entirely on clever
blueprints are read can make older edited files incompatible. How to Restore or Find New Versions
Nevertheless, the original "one-click planet breaker" is gone for good—unless future updates accidentally re-introduce the bug.
As of April 2026, many older "nuke" blueprints may no longer function as originally intended due to continuous updates to the game's engine and physics: Spaceflight Simulator Patches and Updates - SteamDB