Visco Posted September 26, 2016 Posted September 26, 2016 I was wondering if their was a formula for calculating how long of a piece of craft paper I'll need to make a 1/2 tube with 1/4 walls?
chuckufarley Posted September 26, 2016 Posted September 26, 2016 Something like this? http://www.handymath.com/cgi-bin/rollen.cgi?submit=Entry
Mumbles Posted September 26, 2016 Posted September 26, 2016 It's not perfect, but the formula I've used is as follows. It gives the same result as the above calculator. Paper lengths = [pi * w * (d + w)] / (p) w = wall thicknessd = inner diameterp = paper thickness
Visco Posted September 26, 2016 Author Posted September 26, 2016 Is that 3.14*.250*(.50+.250)/.004? Sorry I'm not very good at math. Just trying to figure that formula out. 1
Mumbles Posted September 26, 2016 Posted September 26, 2016 Yes, that is correct. I've always found it easier just to use the calculator, or use a program to do it. I wrote an excel spreadsheet do it for me, which I attached. There are some common paper thicknesses included. Tube Rolling APC.xlsx
Visco Posted September 27, 2016 Author Posted September 27, 2016 What kind of paper would you recommend to roll 1lb pound rocket tubes for rockets and small fountains? I tried a brown Kraft paper I found at lowes and haven't had much success with it using titebond lll. I used it full strength then watered it down and got a little bit better results but not perfect. The paper is .007 thick they have a role that is a little thicker I may give a try. And mumbles I tried that formula and it worked out perfectly. Thank you for that.
Wiley Posted October 2, 2016 Posted October 2, 2016 This is how I learned to roll tubes. I use that ~70# paper from Lowes or Home Depot from the paint section, and watered-down Elmer's white glue. After rolling thousands of them, it's now easy to make my own spolette tubes and small tubes for little inserts. I never did have much success making the bigger tubes though. Something to work on.
OldMarine Posted October 2, 2016 Posted October 2, 2016 I learned from Viking's tutorial as well. That dude is a seriously skilled pyro who isn't stingy with his knowledge. He has many great videos on his YT channel.
Richtee Posted October 4, 2016 Posted October 4, 2016 (edited) Damn..now I want to roll some tubes. Anyone wanna buy them? Sigh. I miss smelling the smoke. Honestly..I lit a foot of visco the other night on my deck just for the smell. Maybe I should post that in “You know yer a pyro when..” Heh! Edited October 4, 2016 by Richtee
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