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Better Contraption Diagram
Precision engineering for Create: Aeronautics
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.
Preview
Rope balancing preview
CoM Targeting Tool
Balloon Volume Calculator
In Game Preview with "Counterbalancing Helper"
Key Features:
- CoM Targeting Tool: A specialized screen where you can set a "target" Center of Mass. The mod calculates exactly where and how much weight you need to add to achieve it.
- Counterbalancing Helper: Easily identify and match block pairs with opposite CoM offsets to keep your build stable.
Extra Features:
- Extra Force Data: Displays precise force direction coordinates and the resultant force vector.
- In-world block CoM: Highlights the Center of Mass of the specific block you are looking at (requires Engineer's Goggles and F3 menu to be active).
All Versions
+ Add Version
[1.2.2] Better Contraption Diagram 1.2.2
by Zelaux on Aug 21, 2026
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- Added compatibility with sable 2.0.5
[1.2.1] Better Contraption Diagram 1.2.1
by Zelaux on Aug 07, 2026
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- Changelog**
- Added Balloon Volume Calculator
- Added scrolling for the force group list
- Vector coordinates are now hidden unless **[Shift]** is held
- Added support for forces from connected contraptions (also works when balancing)
- Added initial support for rope forces in balance calculations
- Fixed crashes related to improper API implementation in some external mods
- Added client command
/bcd sublevel_info - Fixed off-center blocks cache invalidation
[1.1.1] Better Contraption Diagram 1.1.1
by Zelaux on Jul 05, 2026
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Changelog 1.1.1
- Updated dependencies:** Sable 2.0.0, Aeronautics 1.3.0
- Added force display for connected contraptions.
- Added equivalent mass calculation for forces(hold **Shift**).
- Added max speed demo based on force calculations (Note: **sails** are not yet implemented).
[1.1.0] Better Contraption Diagram 1.1.0
by Zelaux on Jun 18, 2026
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## Changelog:
- Fixed sublevel rescue command when sublevel is not loaded
- Added tooltip for calculator button
- Marked mod as optional
- Fixed center-of-mass tooltip for items
- Implemented symmetry reduction for Center of Mass tooltip
[1.0.2-b] BetterContraptionDiagram 1.0.2-b
by Zelaux on Jun 09, 2026
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- Fixed network protocol error
[1.0.2-a] BetterContraptionDiagram 1.0.2-a
by Zelaux on Jun 08, 2026
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> **Stability Warning:**
> This version **might** be unstable due to a discovered issue in > **FabricMixin**:
> https://github.com/FabricMC/Mixin/issues/213
### Changelog ###
> This version **might** be unstable due to a discovered issue in > **FabricMixin**:
> https://github.com/FabricMC/Mixin/issues/213
### Changelog ###
- Added a display for the **sum of forces** and its **displacement** (
¡button).
[1.0.2] BetterContraptionDiagram 1.0.2
by Zelaux on Jun 08, 2026
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Should be stable
## Changelog ##
## Changelog ##
- Fixed a networking error that caused the mod to malfunction
- Fixed controls for **Create: Enhanced Diagrams** when the Calculator is open
- Updated the display when Target Center of Mass is not selected
[1.0.1-a] BetterContraptionDiagram 1.0.1-a
by Zelaux on Jun 03, 2026
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Fixed crash when rendering some tooltips
[1.0.1] BetterContraptionDiagram 1.0.1
by Zelaux on Jun 02, 2026
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- Update released 1.0.1!**
- Added CoM cache resetting.
- Added /sublevel rescue command (Originally for debugging, but it can help you rescue your contraptions from the void).
- Added local saving for Target CoM (Prevents data loss when moving far away from the diagram or when reconnecting to the server).
- Added server-side sync support.
[1.0.0-a] BetterContraptionDiagram 1.0.0-a
by Zelaux on May 29, 2026
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Removed required jei dependency
[1.0.0] BetterContraptionDiagram 1.0.0
by Zelaux on May 26, 2026
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Added
- CoM Targeting Tool
- Counterbalancing Helper
