Minecart with Furnace

Minecarts with Furnace (also called Powered Minecarts) are a special type of minecart which accepts coal or charcoal as fuel for powered movement and can be used to push other minecarts, thus functioning as an engine.

Crafting
A Minecart with Furnace is crafted from a Furnace and a Minecart, as shown below:

Usage
To use the Minecart with Furnace, first place it on a track. Select your fuel (currently only Coal and Charcoal work) then use the "Use" control (normally right-click) on the Minecart. When right-clicking on the Minecart, you want to face the direction you want it to travel. You can make the cart change direction by right-clicking the Minecart while facing the opposite direction of travel. Your coal will be consumed once used on the furnace.

A Minecart with Furnace can push other carts at 3.4ms-1. 1 coal or charcoal will cause the Minecart to run for 3 minutes or travel 612m.

Behavior

 * Breaking a Minecart with Furnace gives a plain cart and the furnace back (but any fuel inside will be lost).
 * Minecarts with Furnace cannot push other carts around 180-degree hairpin turns.
 * A player in a cart adds significant weight, requiring more power to push.
 * 1/1 slopes are too steep for a single Minecart with Furnace to push a single occupied cart uphill. 1/2 slopes (one flat-rail between each up-ramp) will allow you to push your train upwards, as it appears the Minecarts with Furnace have force applied in intervals.
 * Multiple Minecarts with Furnace yield more pushing power; 2 powered minecarts can push a player-occupied minecart up a 1/1 slope. (although very slowly). Three powered minecarts can push an occupied minecart up such a slope a very little bit faster but adding more powered carts doesn't have much effect on the speed.
 * A single Minecart with Furnace can push an occupied minecart up a 1/1 slope if there are additional minecarts being pushed (possibly due to bumping physics).
 * When a powered minecart runs out of fuel, it does not brake.
 * If too much stress is put on the Minecart with Furnace then it will stop. Right-click activates it again.
 * As of 1.0.0, each piece of coal powers a Minecart with Furnace for 3 minutes. Adding another piece of coal at any time increases the total range by another 3 minutes.
 * As of 1.0.0, Minecarts with Furnaces on a level track will cover 200 meters per minute (about 3.33 m/s), or 600 meters per piece of coal. Pushing multiple Minecarts may decrease the range slightly, depending on collisions.

Trivia

 * Right clicking will cause the Powered Minecart to go forward a little bit, even if it is not loaded with fuel.


 * The item was implemented in the Seecret Friday Update 7.

Bugs

 * As of Beta 1.8.1, Powered Minecarts do not produce the new lighting.
 * The orientation of the minecart and its furnace depends on the track only. As a result, the furnace may reverse front-to-back as the cart goes through a turn, and it will do so repeatedly when moving along a diagonal track.

Future
In the future Mojang may make Minecart with Furnace much faster.