RealFuels v15.6.0 for KSP 1.12.x

What's Changed

• Added Russian translation for Real Fuels by @Tagir-1 in #322
• Add OnTankDefinitionChanged event by @siimav in #326
• Added more informative explanation for vapor in feedlines by @Tagir-1 in #323

New Contributors

• @Tagir-1 made their first contribution in #322

Full Changelog: v15.5.0.0...v15.6.0.0