Elytra Speed Cap

A lightweight mod that limits the maximum speed of elytra flight to a configurable value.

Works in both singleplayer and on a dedicated server, with an optional client-side mod that offers additional improvements for players.

Ideal for multiplayer servers that want to nerf elytra rushing, reduce chunk-loading lag, or balance late-game travel.

Why Use This Mod?

1. Performance Boost: Prevents high-speed elytra flight from overwhelming your server's chunk loader while being designed to be very lightweight.

2. Comprehensive Coverage: Works with every kind of boosting: Vertical boosting, rocket boosting and even when boosting your flight via a riptide trident.

3. Fairness: Makes fast travel more balanced without disabling elytras altogether.

4. Flexible: The server-side mod prevents all players, including those without it, from flying faster than the configured speed, allowing vanilla setups to join seamlessly. The client-side mod enhances the flying experience, making it smoother.

5. Compatible: It's fully compatible with modded setups right out of the box. Like for example, the popular mod Do a Barrel Roll.

How It Works

Minecraft calculates elytra flight server-side, while the client predicts motion locally. To enforce a maximum speed cap:

• Server Side: Caps player velocity when exceeding the configured speed.
• Client Side (optional): Syncs the flight prediction to prevent visual stutter or lagging back.

Note: Without the mod on the client, players might snap back (lag back) because the server corrects their velocity when exceeding the cap. Server owners should encourage players to install the mod for a smoother experience.

Configuration

A config file is created at:

./config/elytra-speed-cap.json

Default contents:

{
  "max_speed": 60.0
}

• max_speed: Maximum allowed elytra speed in blocks per second.
• After editing, restart the server/game to apply changes.

Contributing & Issues

I warmly welcome:

• Bug reports
• Feature requests
• Pull requests

Please open issues or PRs on GitHub.

License

This project is licensed under the LGPLv3 License. See LICENSE for details.

Elytra Tuning

A lightweight mod that adds configuration options to limit elytra flight speed and change firework boost strength and duration.

Works in both singleplayer and on a dedicated server, with an optional client-side mod that offers additional improvements for players.

Ideal for multiplayer servers that want to nerf elytra rushing, reduce chunk-loading lag, or balance late-game travel.

Why Use This Mod?

1. Configurable Speed Limits: Limit either horizontal flight speed or total three-dimensional velocity.
2. Firework Tuning: Adjust both the strength and duration of firework boosts.
3. Performance and Balance: Reduce extreme chunk loading and rebalance late-game travel without disabling elytras.
4. Flexible: The server enforces its configuration for every player, while the optional client installation synchronizes prediction for smoother flight.
5. Compatible: Handles normal flight, firework boosting, riptide launches, and modded flight setups such as Do a Barrel Roll.

How It Works

Minecraft calculates elytra flight server-side, while the client predicts motion locally. To apply the configured speed limits and firework tuning:

• Server Side: Enforces the configured speed limits and adjusts firework boost strength and duration.
• Client Side (optional): Mirrors these settings locally to keep flight prediction consistent.

Note: Without the mod on the client, players might experience visual stutter or lag back because their local speed and firework prediction can differ from the server.

Configuration

A config file is created at:

./config/elytra-tuning.json

Default contents:

{
  "speed": {
    "max": 60.0,
    "calculation": "HORIZONTAL"
  },
  "rocket": {
    "strength": 1.0,
    "duration": 1.0
  }
}

• speed
  • max: Maximum allowed elytra speed in blocks per second.
  • calculation: HORIZONTAL measures X/Z movement; ABSOLUTE measures total X/Y/Z velocity.
  • rocket
    • strength: 0.0 disables acceleration, 1.0 is vanilla strength, and higher values add stronger forward acceleration.
    • duration: 1.0 is vanilla duration, 0.5 halves it, and 2.0 doubles it.
  • Set speed or rocket to null to not apply any tuning.
  • After editing, restart the server/game to apply changes.

Showcase

Speed Limiting

Configuration

{
  "speed": {
    "max": 10.0,
    "calculation": "HORIZONTAL"
  },
  "rocket": null
}

Rocket Boosting: Measured in-game speed is 9.90 blocks per second.

Riptide Trident: Measured in-game speed is 9.99 blocks per second.

Firework Tuning

Configuration

{
  "speed": null,
  "rocket": {
    "strength": 8.0,
    "duration": 2.0
  }
}

Rocket Boosting: Measured in-game speed is 60.65 blocks per second.

Contributing & Issues

I warmly welcome:

• Bug reports
• Feature requests
• Pull requests

Please open issues or PRs on GitHub.

License

This project is licensed under the LGPLv3 License. See LICENSE for details.