marks265 Posted September 30, 2015 Share Posted September 30, 2015 I am kind of thinking in the 1 pound size and driver length as well. When I get around to getting back to this guy I do have some tubes for examples. I know the tubes need to fit our tooling otherwise it would be really bad for me. Thanks for the inputs. I'll start a new thread on this sometime in the near future hopefully. This summer has been pretty nuts for me. Mark Link to comment Share on other sites More sharing options...
WRAITH Posted January 19, 2016 Share Posted January 19, 2016 Roll them yourself, i apply a bit of talc powder (easy removal) or baking paper on a round wooden dowel (like a broom handle) or the size you need & wrap brown paper or thick brown paper around the wooden dowel then use spray glue as it doesn't make the paper moist but tacky to touch & roll. Cut to desired length & your done. Use the dowel to compress the propellant. Link to comment Share on other sites More sharing options...
Col Posted January 19, 2016 Share Posted January 19, 2016 I`ve switched to using ptfe (teflon) mandrels, they have to be turned to the correct size but nothing sticks to them. Link to comment Share on other sites More sharing options...
Col Posted January 20, 2016 Share Posted January 20, 2016 Here`s a few tubes i tested today to make sure they can handle a minimum of 7500psi unsupported. 1 Link to comment Share on other sites More sharing options...
kaotch Posted January 20, 2016 Share Posted January 20, 2016 @ColThat looks absolutely fabulous would you mind sharing as to what kind of glue you are using? Link to comment Share on other sites More sharing options...
Col Posted January 20, 2016 Share Posted January 20, 2016 (edited) Its a blend of silicate,casein and dextrin. The tubes are 3/4" id with a 3/16 wall, Edited January 20, 2016 by Col Link to comment Share on other sites More sharing options...
stix Posted January 21, 2016 Share Posted January 21, 2016 (edited) Yes, very nice looking tubes Col. Edited January 21, 2016 by stix Link to comment Share on other sites More sharing options...
Col Posted January 21, 2016 Share Posted January 21, 2016 (edited) Cheers Stix,i roll them 2ft long, cut to length and use the offcuts for the burst tests. The D`s tested at 7800psi, the best uk commercial tube i`ve tested so far managed 6000 psi, the worst was less than 2000psi. Here`s a couple of my black edition tubes, 1/8 and 3/16 wall Edited January 21, 2016 by Col Link to comment Share on other sites More sharing options...
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