Furnace Minecart

Furnace Minecart

The vanilla furnace minecart is capped at half the normal minecart speed and only accepts coal. This mod reworks it into the primary way to push long-distance trains.

Changes

• Any fuel: accepts any item registered as fuel (coal, charcoal, planks, blaze rods, lava buckets, etc). Burn duration is the fuel's actual value from the fuel registry, not a fixed 3600 ticks.
• Face-away on placement: when placed by a player, the cart faces away from you. When placed by a dispenser facing North or West, the cart faces away from the dispenser. South and East dispensers keep the default orientation.
• Self-propulsion: while lit, the cart adds a small push along its facing direction every tick (roughly +0.5 blocks/sec^2). Over a few seconds the cart reaches the max speed allowed by the rail it is on.
• No vanilla halving: the internal getMaxSpeed() * 0.5 is replaced with * 1.0, so furnace minecarts use the same cap as any other cart.
• No slope slowdown: unlike other carts, furnace minecarts do not lose speed going up slopes.

Using

Right-click an empty furnace minecart with any fuel item. The cart lights up and starts moving in its facing direction. Keep feeding fuel to extend the trip. Fuel tops up to a maximum of 32,000 ticks (26 minutes and 40 seconds of continuous burn).

The cart pushes along its facing direction regardless of where you interact from. If it is facing the wrong way, pick it up and place it again; orientation is fixed at placement.

Lava buckets are handled correctly: the bucket returns to the player's hand (or stays as an empty bucket in the inventory slot that contained the lava bucket if pulled by a train).

Physics Interactions

• On a copper rail: reaches the tier cap over time (up to 40 blocks/sec on Unaffected tier).
• On a powered rail: the non-furnace speed clamp does not apply to furnace minecarts, so they pass through at full speed rather than being clamped to 8 blocks/sec.
• Powered rail toggle: while on a powered rail with fuel remaining, the lit state follows the rail's powered state. A powered-off rail extinguishes the cart without burning fuel; a powered-on rail relights it.
• In water: the cap is halved like any other cart.
• While empty of fuel: horizontal velocity decays at 0.75 per tick (faster than vanilla's 0.98). The cart coasts to a stop more quickly.
• Unpushable: other minecarts cannot push a furnace minecart out of alignment.
• Unbreakable tick: furnace minecarts do not slow down going up slopes.

Save Data

The cart persists its fuel count and lit state across world reloads. If bound into a train, the list of trailer UUIDs is also saved on the locomotive; the chain re-forms on next tick after load.