DatapacksJava
Dense Architectural Inertia Data Pack (1.20.1) – True Block Weight for Flying


Dense Architectural Inertia Data Pack adjusts the weight of Create copycat blocks to match real block physics in Valkyrien Skies. This data pack recalculates mass values based on actual block sizes and materials, making flying contraptions handle realistically. It fixes balance issues where decorative copycat blocks felt either too heavy or weightless on moving vessels.
![]()
Features:
- Adjusts the physical mass of copycat blocks to match their true dimensions and shapes.
- Makes copycat materials weigh the same as their real full-block counterparts.
- Supports standard copycats from the base Create mod.
- Includes mass balance for blocks from Create: Connected.
- Works with additional decorative blocks from Create: Copycats+.
- Prevents physics glitches caused by mismatched mass calculations on custom airships.
How to Use:
- Add the data pack to your world’s datapacks folder.
- Restart your game client completely to allow the physics engine to register the new mass numbers.
- Assemble your physics structures and airships using copycat blocks.
Screenshots:


Dense Architectural Inertia Data Pack Download Links
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: In MC Java Mods, or directly above on this page.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
Verified by MCModsHub
- Downloads as 507894.mcpack
- Download size: 33 KB
- Download link checked 10 Sept 2026 — working
- Mirrored on our own servers — the download does not depend on the original host
These come from our own check of the pack file, not from the source page.