ModsFinder

Better Contraption Diagram

by Zelaux

Better Contraption Diagram is a NeoForge client-side tool that reworks the Contraption Diagram screen for Create Aeronautics ships, adding balance and force readouts.

NeoForgeClient-side onlyMIT LicenseOpen source1.21.1

What it does

On the client, the mod replaces the Contraption Diagram interface with a specialized screen where a player sets a target Center Mass. From the chosen target it calculates where, and how much, weight must be added to bring the center of mass to that point. A counterbalancing helper finds matching block pairs with opposite center-of-mass offsets, which helps a build stay stable while it is being assembled.

The mod also reports extra force data: the precise direction and coordinates of the resultant force vector. An in-world block CoM display highlights the center mass of the specific block being looked at, which needs Engineer's Goggles and the F3 debug menu to be active. Create Aeronautics is required, and the mod is published for NeoForge 1.21.1 under the MIT License, with its source code and issue tracker public.

Key features

  1. Balancing tool

    A screen that sets a target center of mass and works out the weight needed to reach it.

  2. Counterbalancing helper

    Finds block pairs with opposite center-of-mass offsets so a build can be kept level.

  3. Force data readout

    Shows the precise direction and coordinates of the resultant force vector.

  4. In-world block CoM

    Highlights the center mass of the block being looked at, shown with Engineer's Goggles and the F3 menu.

Compatibility

Latest build for each game version and loader.

1.21.11.2.2
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 1

Create AeronauticsBuild anything from airships to planes and cars!
Required

Use cases

Who it’s for: Players who build flying contraptions with Create Aeronautics and want exact balance and force numbers while they work. Because the mod is client-side only, players install it on their own game and servers do not need it.

Questions

Does Better Contraption Diagram need Create Aeronautics?

Yes. Create Aeronautics is a required dependency, so it must be installed alongside this mod.

Do servers need Better Contraption Diagram?

No. Players add it to their own game, and a server needs no copy.

Which Minecraft version does the mod support?

The mod is published for 1.21.1 only, on NeoForge.

Why are some CoM features hidden?

The in-world block CoM highlight requires Engineer's Goggles and the F3 debug menu to be active.

In the catalog

Better Contraption Diagram is one of 8,499 Technology mods on ModsFinder, and one of 3,557 Technology mods for NeoForge. 32,366 mods support Minecraft 1.21.1.

Technology mods8,499NeoForge modsMods for 1.21.132,366

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What the author says

This mod revamps the Contraption Diagram UI, giving you the extra data you need to build perfectly balanced aircraft. No more guessing why your ship is tilting — now you have the numbers.
Zelaux, on the Modrinth page

Official listing

Owner
Zelaux
Published
2026-05-26
Updated on Modrinth
2026-08-21
Facts verified
2026-10-15

Tags

TechnologyUtility
Open on ModrinthCompare