🪽 Max Elytra Fly Speed

"Lift the vanilla flight ceiling — tune Elytra speed and rocket boost to exactly how you want to fly."

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📖 Introduction

Vanilla Minecraft's Elytra flight engine caps your speed aggressively. No matter how many Firework Rockets you fire or how steep your dive angle, the engine clamps momentum and imposes fixed drag curves that prevent you from ever going truly fast. This is vanilla's intentional design — but it is a design I built a configurable override for.

Max Elytra Fly Speed exposes three native GameRules that let you push the flight ceiling to wherever you want it. Set a higher maximum speed in Blocks/Second, tune the rocket launch threshold, and dial in the high-speed acceleration factor. The mod uses two targeted Mixins that replace the vanilla drag calculation and rocket boost vector with fully configurable equivalents — nothing else is touched.

[!NOTE] 1 Jar 1 Version Policy: I build 1 dedicated JAR per Minecraft version (e.g. MC 26.2, MC 26.3). Download the build that matches your exact Minecraft installation.

[!IMPORTANT] Server + Client Installation Required: Install the mod on both the server and the client for multiplayer. GameRules are server-authoritative — the configured speed ceiling applies to all players on the server.

Part of the Instant Gratification Collection — mods that respect the player's time.

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✨ Features

🚀 Configurable Maximum Flight Speed

The mod replaces the vanilla elytra drag multiplier with a dynamic calculation in ElytraDragHelper. At the default of 50 BPS the drag is identical to vanilla. Raise the limit and drag relaxes proportionally — allowing sustained higher-speed glide and diving momentum.

• Set your personal speed ceiling anywhere from 1 to 500 Blocks/Second via GameRule.
• Velocity is hard-clamped each tick to ensure the configured ceiling is never exceeded.

🎆 Configurable Rocket Boost Engine

The mod redirects vanilla's firework setDeltaMovement call through RocketBoostHelper, which implements a two-phase boost model:

1. Snappy Launch Phase — below the elytra_initial_boost_speed threshold, rocket ignition applies fast 50% convergence acceleration toward that threshold.
2. Proportional Convergence Phase — above the threshold, each rocket fires a proportional pull toward the max speed ceiling controlled by the elytra_high_speed_acceleration factor.

This means chaining rockets provides meaningful acceleration all the way up to your configured ceiling, rather than plateauing at the vanilla rocket cap.

🎛️ Optional In-Game Configuration GUI

Install ModMenu + YACL (YetAnotherConfigLib v3) to access a client-side configuration screen. All three parameters are exposed as sliders with live-sync to the corresponding in-game GameRules when playing in singleplayer.

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⚙️ Native GameRules & Server Configuration

All three GameRules are registered under the max-elytra-fly-speed namespace and appear in the in-game GameRule screen under their own category.

GameRule Key	Type	Default	Valid Range	Description
max-elytra-fly-speed:max_elytra_fly_speed	Integer	50	1 – 500	Maximum Elytra flight speed ceiling in Blocks/Second.
max-elytra-fly-speed:elytra_initial_boost_speed	Integer	30	1 – 300	Speed threshold (BPS) below which rocket ignition applies snappy launch acceleration.
max-elytra-fly-speed:elytra_high_speed_acceleration	Integer	15	1 – 1000	High-speed convergence rate (permille, i.e. 15 = 15%) toward max speed per rocket above threshold.

[!TIP] Vanilla behaviour at defaults: At max_elytra_fly_speed = 50 and elytra_initial_boost_speed = 30 and elytra_high_speed_acceleration = 15, flight physics are near-identical to unmodded Minecraft. Increase values gradually to find your preferred feel.

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🏗️ How It Works (Technical)

Two Mixins are injected into vanilla classes:

Mixin	Target	What It Does
LivingEntityMixin	LivingEntity#updateFallFlyingMovement	Redirects the drag Vec3.multiply() call through ElytraDragHelper, which relaxes horizontal and vertical drag proportionally as the configured max speed rises above 50 BPS. Also injects before move() to hard-clamp velocity to the configured ceiling.
FireworkRocketEntityMixin	FireworkRocketEntity#tick	Redirects setDeltaMovement() through RocketBoostHelper to implement two-phase snappy launch + proportional high-speed convergence.

No packet manipulation. No command system. No damage modification. Strictly flight physics only.

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📦 Installation & Requirements

Required

• Fabric Loader >= 0.19.5
• Fabric API (any version matching your MC anchor)
• Dasik Library >= 1.9.0
• Java 25

Optional

• ModMenu — adds config screen entry
• YetAnotherConfigLib (YACL) v3 — enables in-game configuration sliders

Supported Minecraft Versions

1.20.1 · 1.21.1 · 1.21.11 · 26.1.2 · 26.2 · 26.3+

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☕ Support & Community

I'm an independent solo developer building lightweight, vanilla-enhancing mods. If Max Elytra Fly Speed made your flights more satisfying, consider supporting my work:

[!TIP] 🇮🇩 Indonesian supporters: Local payment options (GoPay, OVO, Dana, QRIS, LinkAja) available via Saweria or SocioBuzz!

• 💬 Discord: https://discord.gg/EV99bgAFqb

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📜 Metadata & Permissions

Property	Value
Mod Name	Max Elytra Fly Speed
Namespace / Mod ID	max-elytra-fly-speed
License	GNU General Public License v3.0 (GPLv3)
Environment	Server & Client
Source Code	GitHub Repository
Issue Tracker	GitHub Issues

[!IMPORTANT] 📦 Modpack Permissions & Distribution: You are welcome to include this mod in any modpack on any platform. The mod file must be downloaded through official channels (Modrinth or CurseForge). Re-uploading or mirroring the JAR to third-party sites is strictly prohibited.

⚖️ Fork Guidelines: This project is open-source under GNU GPLv3. You may fork it for genuine modifications or ports — provided your project stays open-source under GPLv3 with attribution. Straight 1:1 re-uploads or clone forks with no meaningful changes are forbidden.

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