billdz
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- Feb 10, 2017
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Last year I had a fiberglass av-bay that was too tight going into the airframe, and the folks on this forum gave me some tips that solved the issue, see https://www.rocketryforum.com/showt...s-to-fit-coupler-to-airframes&highlight=tight
Now I'm having a similar problem with a cardboard rocket, but the previous tips do not appear to be working, perhaps different methods are needed for cardboard. Both sides of the av-bay slide smoothly into the upper airframe, but both sides are too tight going into the lower airframe. I've hand sanded with a variety of coarse and fine sandpapers but the problem persists. I've tried drawing concentric circles with a dry erase marker to show the high areas. This tip worked great on the fiberglass but seems not to work with cardboard, as the ink just sinks in and does not leave marks on the high spots. With the fiberglass, it was suggested to clean out the tube with alcohol after sanding to remove particles, but that does not seem effective on cardboard. Talcum powder also did not help.
Any tips for getting a good smooth fit on a cardboard rocket?
Thanks, Bill
Now I'm having a similar problem with a cardboard rocket, but the previous tips do not appear to be working, perhaps different methods are needed for cardboard. Both sides of the av-bay slide smoothly into the upper airframe, but both sides are too tight going into the lower airframe. I've hand sanded with a variety of coarse and fine sandpapers but the problem persists. I've tried drawing concentric circles with a dry erase marker to show the high areas. This tip worked great on the fiberglass but seems not to work with cardboard, as the ink just sinks in and does not leave marks on the high spots. With the fiberglass, it was suggested to clean out the tube with alcohol after sanding to remove particles, but that does not seem effective on cardboard. Talcum powder also did not help.
Any tips for getting a good smooth fit on a cardboard rocket?
Thanks, Bill