Tommy's Ship Speed

A configurable Valheim 1.0 ship-speed mod for the Raft, Karve, Longship, and Drakkar.

Features

Separate half-sail and full-sail speed multipliers for every vanilla ship.
Separate forward and reverse rowing multipliers for every vanilla ship.
Optional propulsion bonus from additional seated rowers.
Configurable maximum contributing rowers per ship.
Per-ship turning speed multiplier.
Smooth propulsion ramping to reduce physics jumps at high speed multipliers.
Optional AlwaysWindAtBack setting per ship.
Multiplayer-compatible synchronized gameplay configuration through Jotunn.
Ship physics changes are applied only by the current network owner.

Requirements

Valheim 1.0
BepInExPack Valheim 5.4.2350 or newer
Jotunn 2.30.0 or newer

The mod is intended to be installed on every client participating in a modded multiplayer session and on the dedicated server when one is used.

Configuration

The config file is generated after the first successful launch:

BepInEx/config/tommy.valheim.shipspeed.cfg

Each ship has its own section with:

HalfSailSpeedMultiplier
FullSailSpeedMultiplier
ForwardRowingMultiplier
ReverseRowingMultiplier
PerOccupiedRowerBonus
MaxRowers
RowersAffectSailing
AlwaysWindAtBack
TurningSpeedMultiplier

General settings include:

Enabled
DebugLogging
PropulsionRampSeconds

For very high propulsion multipliers, increasing PropulsionRampSeconds to 1-3 seconds or more can produce a gentler start.

Multiplayer

Gameplay configuration values are synchronized with Jotunn. The current network owner of a ship applies the propulsion and turning changes, preventing multiple peers from stacking the same physics modification.

AlwaysWindAtBack applies to the locally controlled sailing ship while that player is at the helm with half or full sail. It affects both sail calculations and the local wind indicator without permanently changing stored weather state.

Installation

Install with Thunderstore Mod Manager or r2modman. BepInExPack Valheim and Jotunn are installed automatically as dependencies.

For manual installation, place TommysShipSpeed.dll in a folder under BepInEx/plugins/ and ensure BepInExPack Valheim and Jotunn are installed.