Ive had several rocket body tubes ruined by the shock cord tearing into the body tube at ejection and making long slits. How can I prevent this?
Many of us have recovered our rockets only to find that shock line has slit (‘zippered’) the body tube. This happens most often when a very thin shock line is used or when the rocket is traveling very fast when the tubes separate. The following suggestions have been offered to prevent this from happening: From: barrett@powder.add.itg.ti.com (Stu Barrett) I built a LOC Caliber a year or so ago. I installed a LOC ejection baffel at the top of the motor mount tube and that worked great. However, I’m in the process of enhancing my model so that it uses the “anti-zipper” technique that is described in the Mar/Apr [1993] issue of HPRM. It combines a fool proof mechanism to eliminate the dredded “zipper effect” and also has a nice effect that no wadding is needed.
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