EVENT Date September 17 2016
Description Turf to Tools 2 - A
Goal furnace dynamic test
Team Darrell Markewitz
Eden Jolly
Uist Corrigan
Llye Erddyn Davies
Andrew Dunlop
records Uist Corrigan
photos Kelly Probyn-Smith
FURNACE Type Pictish (short shaft)
Material clay / horse manure cobb
Interior 25
Height 68
Stack 49
Base 19
Packing carcoal fines 14
Tuyere standard copper
Diameter 2
Angle -20
Proud 5
Air System leaf blower electric
Extraction bottom via arch
MATERIALS Ore DD 2 (red / Scottish)
Charcoal Beach ? 
CLOCK ELAPSED EVENT AIR CHARCOAL ORE
UNIT COUNT TOTAL Unit TOTAL
pressure LpM bucket kg kg kg
absolute psi 1.35
905 start wood splints pre-heat
1115 2:10 fill with rough charcoal * 1 *
1124 increase air * 2 * 2.65 3.58
1127 start addition of graded charcoal
1130 main sequence start
1138 1 1 1.35
1148 air increased * 3 *
1151 13 1 2 2.70
1156 temperatures : T = 1150
 + 20 = 1250 : + 30 = 879
 + 40 = 730 : top = 500
1204 13 1 3 4.05
1205 air increased * 4 *
1215 11 first ore addition (as 250 gm) 1 4 5.40
1227 12 1 5 6.75 1 1
1235 8 1 6 8.10 1 2
1246 11 1 7 9.45 1 3
1256 10 1 8 10.80 1 4
1306 10 ore increased (as 3 x 500 gm) 1 9 12.15 1.5 5.5
1316 10 1 10 13.50 1.5 7
1327 11 1 11 14.85 1.5 8.5
1339 12 ore increased (as 4 x 500 gm) 1 12 16.20 2 10.5
1351 12 1 13 17.55 2 12.5
1401 10 1 14 18.90 2 14.5
1413 12 ore increased (as 3 x 1000 gm) 1 15 20.25 3 17.5
1427 14 1 16 21.60 3 20.5
1437 10 ore decreased (as 4 x 500 gm) 1 17 22.95 2 22.5
1448 11 1 18 24.30 2 24.5
1500 10 ore increased (as 3 x 1000 gm) 1 19 25.65 3 27.5
1510 10 ore decreased (as 4 x 500 gm) 1 20 27.00 2 29.5
1521 11 ore increased (as 3 x 1000 gm) 1 21 28.35 3 32.5
1531 10 ore decreased (as 4 x 500 gm) 1 22 29.70 2 34.5
1544 13 ore increased (as 3 x 1000 gm) 1 23 31.05 3 37.5
1555 11 ore decreased (as 4 x 500 gm) 1 24 32.40 2 39.5
1609 14 last ore added (as3 x 1000 gm) 1 25 33.75 3 42.5
1621 12 charcoal to cover 1 26 35.10
1630 slag tap / clear tuyere
1633 12 start burn down 1 27 36.45
1643 reduce air  * 3 *
1646 reduce air  * 2.5 *
1650 reduce air / start extraction * 2 *
TOTALS
Charcoal 40 kg
Ore 42.5 kg
Bloom 3.5 kg
Gromps
Yield 8 %
Condition
Quality
air via electric leaf blower
marked volume control