![](http://i.imgur.com/U8QKgmW.jpg)
What you're looking at is the largest & fastest semi-automated furnace that I have created in 1.8 vanilla Minecraft.
I created this thing in a 6 hour session live on Twitch. As soon as I finished it and got it working fully I hit 50 followers. \o/
This bad boy can smelt a whole chest of items within a few minutes.
I've named this monster the "Trail Blazer" because as the minecart rides ontop of all the furnaces,
It lights each furnace 1 by 1 and it looks like the minecart is moving so fast that its leaving a blazing trail behind it.
Standard Furnace takes 288 minutes to smelt an entire chest of items.
Dual Furnace takes half of that (144) to smelt an entire chest of items.
The Trail Blazer takes 4 minutes to smelt an entire chest of items.
https://www.youtube.com/watch?v=T-r3tIb5LPM&feature=youtu.be