5x3 wrath furnace, and a layman's findings on wrath fire mechanics.

[Roady]

Having heard that wrath furnaces needed to be re-lit after converting a number of iron blocks(though later information brings some doubt to that conclusion), I tried to come up with a method to have an infinitely durable wrath furnace.

During this experimentation I noticed several interesting things:
(I was trying to get a loop of smooth/cobble stone to form a perpetually burning "fuse" of sorts)
-When a wrath fire starts burning on cobblestone (turning it into smooth stone) it will not spread to smooth stone, and vice versa.
-Ordinary fires will likewise prevent wrath fires from spreading to the affected blocks.

This last thing did make me give up the original idea as I could not figure out a good way to automatically extinguish the ordinary flames while not disturbing the wrath flame loop in the process.

Thus I started some more messing around just to see why everyone and there mother seems to use the same 3x3 wrath furnace design.
Which sorta struck me as odd given that they don't seem to be actual hardcoded multiblock structures, but rather just an application of its fire mechanics.

So I made the following contraption:

Removal of any of the blocks seems to kill the flame after a short period. so it may represent the minimum amount of netherbrick that needs to be adjacent to the fire.

Further testing will need to be done to find out if the exact configuration of the netherbrick matters or if it is only the number of bricks that count.

 

[Peppe]

If you don't hear the cave like sounds when you light your wrath furnace then it does not have the minimum netherbrick blocks in the fire's radius (3x3). Without the furnace structure it will just be a regular wrath flame.

I don't recall extensive testing on it, but i believe the 3x3 was easily confirmed. And the number of netherbrick required was 13-14.... something like that. You can put those 13-14 anywhere in the 3x3 cube around the flame you like though.

The furnace flame burns out ~24 blocks if done in rapid succession. Most say it can recharge if the iron you convert is done slowly overtime.

 

[Roady]

Ah I see, well if the exact orientation doesn't matter, then I guess that just merely confirms the value of 13 nearby blocks required.

Sorry if I posted some redundant information though.

 

[budge]

Never apologize for doing the work of !SCIENCE!

I found this helpful.

 

[DoctorOr]

I build wrath furnaces almost exactly like a railcraft blast furnace, the only exception is that the third level from the bottom has a hole in the front as well. That hole is where you put the iron block

So it's like, from top down

XXX
XXX
XXX
 
XXX
X.X
X.X
 
XXX
X.X  <-- Wrath fire here
XXX
 
XXX
XXX
XXX

I've used turtles with place/dig on a loop with several stacks of iron blocks and it doesn't extinguish. Smaller furnaces can extinguish just by rapid use.

 

[SmokeLuvr1971]

any idea on an optimal wait-time to keep the furnace lit? i'm coding 30 seconds into my turtle for a small furnace design.

 

[budge]

Back in 1.4.7, I went as far as 1 hour between cycles in my code, and it was still expiring after a while.

 

[danidas]

From my experience it is a set variable range or a really small chance to extinguish and does not replenish. As I've had my wrath forge go dark upon converting a iron even when it has been weeks since I last used it.