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Archive for July, 2014
Posted by lincoln | Jul 05, 2014 @ 09:04 PM | 35,659 Views
A while back, I asserted that kraft paper rolled up with glue makes a convenient and durable blast tube. I encountered a lot of scepticism, although no one really said why it couldn't work except that it wasn't strong enough. Or something like that. Anyway, I thought it might be good to do a reality test. So I rolled up a tube around a 1 1/4 inch (32mm) dowel. I used enough layers so the wall thickness was around 0.040" (1mm) or maybe 0.050" (1.3mm). I used Titebond 3 for the glue. I meant to test it after only a few hours, but I ended up leaving it in the car for weeks. The workmanship is lousy and it's ugly, but it works fine. I made up a 32 strand motor from old 1/8" FAI Tan (or Tan II? box doesn't say). Batch was June 00 2001. I've tried to take care of it over the years. The whole thing was pretty short because I didn't want to waste rubber. No damage was apparent. After, I tried supporting a cinder block with the tube. The ends of the tube weren't square, so it did to some damage to the very end of the tube. Unfortunately, I seem to have deleted the picture.
The rest of the pictures should be attached to this post.