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Aeronautics: Massbound

by patrushevvaniaplay

Aeronautics: Massbound gives items, inventories and entities a mass value, so physics-based mods can read how heavy things are.

NeoForgeClient and serverAll rights reserved1.21.1

What it does

The mod assigns mass to vanilla items and vanilla entities, and it counts the contents of an inventory when it totals the mass of a block or entity. Containers and other inventory-holding blocks grow heavier or lighter as their contents change, and the recalculation happens automatically whenever those contents are altered.

It is built as a general-purpose layer rather than an add-on for one vehicle, submarine or gameplay idea. Its purpose is to give other physics-focused modpacks and mods meaningful, dynamic mass values to work with. Modded inventories are supported, and integration with physics-based mods is part of the design.

Installation requires Create, Create Aeronautics and Sable. The mod is published for NeoForge 1.21.1 only, with the 1.0.0 file dated 2026-08-09, and it runs on client and server, so both the server and every player need it. The code is not open source and is licensed as All rights reserved.

Key features

  1. Item mass values

    Vanilla items receive mass values that physics mods can read directly.

  2. Entity mass values

    Vanilla entities get a mass that reflects the items they carry in their inventory.

  3. Dynamic container weight

    Chests and other inventory blocks change weight depending on what is stored inside them.

  4. Automatic recalculation

    Totals update when inventory contents change, so mass stays current without manual steps.

Compatibility

Latest build for each game version and loader.

1.21.11.0.0
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 3

SableA library mod for interactive moving block structures, or "sub-levels"
Required
CreateAesthetic Technology that empowers the Player
Required
Create AeronauticsBuild anything from airships to planes and cars!
Required

Questions

Does Aeronautics: Massbound need Create Aeronautics?

Yes. Create, Create Aeronautics and Sable are all required dependencies, so each must be installed alongside the mod.

Must the server run Aeronautics: Massbound?

Yes. Every player and the server need a copy of the mod.

Which game versions does the mod support?

Only 1.21.1, on NeoForge. The latest file, 1.0.0, was published on 2026-08-09.

What the author says

Massbound is a lightweight mass system designed to make Minecraft physics more dynamic and consistent. The mod assigns mass to items and vanilla entities and takes inventory contents into account when calculating their total mass. Containers and other inventory-holding blocks dynamically change their mass depending…
patrushevvaniaplay, on the Modrinth page

Official listing

Owner
patrushevvaniaplay
Published
2026-08-09
Updated on Modrinth
2026-08-09
Facts verified
2026-10-15
Open on ModrinthCompare