So far this tent has definitely been a learning experience. I have come to the conclusion that the most feasible internal structure would be a spoke hub due to the sagging that occurs with heavy canvas. Most period artwork and surviving artwork also supports this theory. I also have come to appreciate the time and considerable cost it would take to make a tent in a medieval setting.
So far it has taken us at least 50 hours of labor to put together this tent. This time does not include the time spent planning, researching, or accruing materials. This is also using modern tools and machinery. We still have to paint the walls, finish the door ties, create the permanent crow's feet, and the hub and spokes.
As for the costs the canvas tarps cost us about $300. We spent approximately $150 on other materials. Including, the frame, ropes, paint, waterproofing, thread and notions, hardware, and heavy duty ground covers. We could have saved some money on the frame which is a bit overbuilt (4x4 hem fir poles and fancy brackets). Also the paint and the ground covers cost $75 just by themselves, and were not necessary, but we wanted to stay dry and give a medieval feel to the tent.
Some things I will continue to do is create a roof lining, and possibly the walls also, since the canvas has some minor flaws to it. I eventually want to get some uposltry fabric to attach to the ground cloth, to give a more medieval feel. I will be painting the walls. We will be creating a spoke hub.
Thursday, May 31, 2012
Wednesday, May 30, 2012
The guy lines do not keep the roof tight enough to prevent sagging, which means the shoulder is lower, which means the walls do not line up right if pulled all the way out (right side of tent), or they sag if they are in the right place (left side of tent). I do not know if it because the roof is to heavy for the temporary lines I have up or not. I suspect it is the not.
There are a couple of ways It could be fixed, we could raise the center pole 7 to 8 inches, and then the walls would hang right, but the roof would still sag. We could rig up an outer ring to stiffen the shoulder, which would prevent sagging of the roof between the guy lines, but might not keep the shoulder at the height needed. Having perimeter poles would make all the bell space unusable. If I had more canvas I could rip out all the seams, and add more, so the bells would line up, but I do not have any extra. So that leaves retrofitting a hub and spoke system, that would solve both problems of sagging shoulder and wall fitting issues.
Unfortunately I do not think that we will have time to fit it before the event this weekend.... We will have see what tomorrow brings... Maybe I will even get to paint the walls.
Monday, May 28, 2012
I had a lot of time to think about painted tents while I was paining my roof. Most painting of tents have the seams painted at least and many of them have arches also. Paint has some interesting properties. For one, paint makes things stiffer. It also makes canvas shrink. It would be odd to only have the seams painted and the rest of the tent floppy.
If the whole tent was painted in a gesso it would stiffen up and shrink the whole tent. The shrinkage would be uneven, because the stiffer seams would not quite shrink as much. This would help account for the uplift seen inbetween the painted seams at the bottom of the tents. If the whole tent was painted it would make for a stronger tent. The stiffness would help shed both wind and water. The paint also help seal any seams, prevents fraying, and makes the fabric less susecptable to puntures and tears. It also makes the surface easier to paint with color and achive fine lines and intricate patterns, which would be harder on canvas that absorbs liquids.... paint seaps on raw canvas.
If just the seams are painted they are reinforced, but what if the arches are not just decorative?? What if the arches are structural? Paint stiffens up the arches and the seams, spreading pressure and tension.
Thursday, May 24, 2012
Wednesday, May 23, 2012
Gardening. Alright that is what I should be doing, but I am also sewing my tent.
Some of my research links