Talk:Firepit

Can someone add pictures of the orange - yellow - white stages, and make it a bit clearer when to stoke the fire? It's tough to do with just this info. -shadeking

• I added information on the color of a fire as well. The Hue of a fire will be 0 during the stoke phase and 60 during the no stoke phase. --Vulpine 18:08, 26 January 2009 (EST)

Data

stokes	limestone	dried flax	leeks	dried papyrus	->	lime	ash	charcoal
0	100	100	100	100		13	32	25
0	100	-	-	-		13	0	25
0	-	-	100	-		0	4	25
1	100	100	100	-		13	4	25
15	100	100	100	100		19	51	35
25	100	100	-	-		21	18	39
25?	100	100	100	100		22	60	40
30	100	100	-	-		22	19	42
30?	100	100	100	100		22	61	41
50	100	100	100	100		26	76	48

---

Not sure if anyone's collecting stoke data (appears similar to T3). Here's a data point to start with:

200 limestone; 100 dried flax; 200 wood @ 25 stokes (~18 mins) = 21 Lime, 18 Ash, 39 cc

100 limestone; 100 dried flax; 100 leeks; 200 wood @ 1 stoke = 13 lime, 4 ash, 25 cc

Here's my T4 data:

100 limestone; 100 dried flax; 100 dried papyrus; 100 leeks; 200 wood @ 15 stokes = 19 lime, 51 ash, 35 cc

McArine data(not sure about the 30 stoke one being 30 stokes):

• 100 limestone; 100 dried flax; 100 dried papyrus; 100 leeks; 200 wood @ 0 stokes = 13 lime, 32 ash, 25 cc
• 100 limestone; 100 dried flax; 100 dried papyrus; 100 leeks; 200 wood @ 25 stokes = 22 lime, 60 ash, 40 cc
• 100 limestone; 100 dried flax; 100 dried papyrus; 100 leeks; 200 wood @ 30 stokes = 22 lime, 61 ash, 41 cc
• 100 limestone; 100 dried flax; 100 dried papyrus; 100 leeks; 200 wood @ 50 stokes = 26 lime, 76 ash, 48 cc

More: 100 limestone, 0 stokes -> 13 lime 100 leeks, 0 stokes -> 4 ash

I moved the following data here from the main page so it's all in one place: --Inkoaten 17:19, 9 March 2009 (EST)

Stokes	Lime	Ash
20	21	52
30	23	n/a
36	26	n/a
40	n/a	72
60	27	n/a
65	n/a	83

--mosen 18:37, 19 January 2009 (EST)

tehmoosh Firetests

	Limestone/Papy		Limestone/Papy/Leeks
Minutes of Stoking	Lime	Ash	Lime	Ash
50	27	50	27	58
60	29	54	29	63

Firepit was stoked for the time listed and then allowed to die out. This results in about 5 minutes of additional burn time as the fire dies.

Akmenotep Fire Tests

100 Leeks, 100 Dried Flax

• 40 Stokes - 28 Ash, 44 Charcoal

100 Leeks, 100 Dried Flax, 100 Papyrus

• 40 Stokes - 70 Ash, 45 Charcoal

100 Limestone, 100 Leeks, 100 Dried Flax

• 9 Stokes - 21 Ash, 18 Lime, 33 Charcoal
• 19 Stokes - 23 Ash, 20 Lime, 37 Charcoal
• 33 Stokes - 26 Ash, 23 Lime, 42 Charcoal
• 36 Stokes - 28 Ash, 24 Lime, 45 Charcoal
• 40 Stokes - 28 Ash, 24 Lime, 44 Charcoal
• 50 Stokes - 29 Ash, 26 Lime, 47 Charcoal

100 Limestone, 100 Leeks, 100 Dried Flax, 100 Papyrus

• 33 Stokes - 65 Ash, 23 Lime, 43 Charcoal
• 40 Stokes - 70 Ash, 24 Lime, 45 Charcoal
• 50 Stokes - 76 Ash, 26 Lime, 48 Charcoal
• 60 Stokes - 80 Ash, 27 Lime, ? Charcoal

Speed?

How quickly does the color cycle? I tried once and apparently missed the stoking point entirely, even though I thought I was seeing the color progression. -- Shebi 00:10, 13 January 2009 (EST)

• The speed will vary, in general the fire will remain in the stoke phase for around 14 seconds after you stoke. The next phase where the stoke button is removed and the fire will change colors seems to be around 5-10 seconds. The no stoke phase that follows is high variable, I have seen it last as little as 5 seconds and go for over 40. --Vulpine 18:08, 26 January 2009 (EST)
• I used a count of 12 seconds before stoking going 1 and 2 and .... and this worked well for about 10 stokes until my husband walked in. I broke the rhythm but I was able to stoke again about 5 times and then it smouldered out. My yield was between the 10-15 stoke yields. --Dianess 22:34, 5 February 2009 (EST)

Possible yield formulae

Using these formulae, and assuming 1 stoke = 45 teppyseconds, I get very good agreement with the data on this page (in general, +/- 1 for 80% of the data, with a few obvious outliers that are probably measurement errors):

t = int( (burning duration in teppyseconds) / 30 )
charcoal = int( t^(1/3) * 11 )
lime from 100 limestone = int( t^(1/3) * 6 )
ash from 100 flax = int( t^(1/3) * 5 )
ash from 100 leeks = int( t^(1/3) * 2 )
ash from 100 papy = int( t^(1/2) * 5 )

i.e. yield is proportional to the cube root of duration for everything except papyrus, which is proportional to the square root. Duration includes the ignition and smouldering-out time (so t=12 for 0 stokes - 6 teppyminutes from ignition to completion).

I will go ahead and put this on the main page since it agrees well.

I have not tested less than full loads yet. However, speculation:

 lime = int( t^(1/3) * int(limestone/16) )
 ash = int( t^(1/3) * int(flax/20) )
 ash = int( t^(1/3) * int(leeks/40) )     (Not 50! See below)
 ash = int( t^(1/2) * int(papy/20) )

Testing results:

 200 wood + 15 limestone + 19 flax, no stoking -> 25 cc, NO ash, NO lime
 200 wood + 16 limestone + 20 flax, no stoking -> 24 cc, 2 ash, 2 lime
 200 wood + 49 leeks, no stoking -> 24 cc, 2 ash. (Hmmm)
 200 wood + 39 leeks, no stoking -> 25 cc, NO ash
 200 wood + 40 leeks, no stoking -> 25 cc, 2 ash
 200 wood + 19 papy, no stoking -> 25 cc, NO ash
 200 wood + 20 papy, no stoking -> 25 cc, 3 ash

Hypothesis for the full formula (needs verification)

t = int( (burning duration in teppyseconds) / 30 )
charcoal = int( t^(1/3) * 11 )
lime from limestone = int( t^(1/3) * int(limestone/16) )
ash from flax = int( t^(1/3) * int(flax/20) )
ash from leeks = int( t^(1/3) * int(leeks/40) )
ash from papy = int( t^(1/2) * int(papy/20) )

More results. Unfortunately I mis-stoked one of the fires and it went out early, so these have different burn times:

200 wood + 100 limestone + 100 papy + 100 flax + 100 leeks, 28 minute burn time -> 63 ash, 42 cc, 22 lime (Matches formula)
200 wood + 96 limestone + 100 papy + 100 flax + 80 leeks, 33 minute burn time -> 68 ash, 44 cc, 24 lime (Matches formula)

--Inkoaten 19:33, 9 March 2009 (EST)

Excellent update to the wiki. However, two points.

• Stoking once on the yellow following orange works fine. One does not need to stoke once each on yellow->white->yellow
• When one is finished, repeatedly stoking will "ruin the fire prematurely" and put the fire out within a minute. This saves time waiting for it to smolder out "naturally".

--Serkwati 8:43, 14 March 2009 (EST)

You can edit the main page, you know :) --Inkoaten 04:52, 20 March 2009 (EST)

Discussion moved from the main page:

As a note, I haven't quite figured out how to use the firepit correctly and I often stoke it at the wrong time, making the fire go out prematurely. Often this yields low amounts of ash, lime and charcoal, but recently something strange happened: I had three fires going, two loaded with 96 dried flax and 100 limestone, one with just 96 dried flax. The first went out prematurely after a few minutes only with 7 ash (IIRC), the second shortly thereafter with, I think, even lower yields. However, the last one lasted maybe 10-20 seconds longer before it ended prematurely and yielded 24 ash (26 lime and 48 cc)! It had then run for about 3-5 minutes, which shouldn't yield such amounts according to the above figures. -- Tumaini

Are you sure you didn't load the 3rd one with papyrus, not flax? 24 ash sounds about right for 100 papy for 5 mins --Inkoaten 18:28, 19 March 2009 (EST)

Yes, I'm absolutely sure, since I don't have a single papyrus at the moment. -- Tumaini 10.08, 20 March 2009 (CET)

Can you try to reproduce it under controlled conditions and post your results here? I haven't seen any strange outliers like this in my own data, so I suspect a measurement error here more than anything. --Inkoaten 04:52, 20 March 2009 (EST)