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20041118 - allegro - 08 - finishedtubes

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20041118-allegro-08-finishedtubes: Here are my finished first-run tubes. A couple things I did wrong here: 1. The glass wasn't rolled at 45 degree angle! This increases the strength of the tube considerably. 2. When I wrapped the joiner bar/mylar/glass/mylar mandrel sandwich in thin cork, I didn't "spiral wrap" it like Drela says to. This caused a "lip" to form where I had started to wrap the layup! It could probably be sanded out, but I'm going to make another set. Note that the tubes together weigh 4 grams. The brass tubes weight approximately 12g!


20041118-allegro-08-finishedtubes: Here are my finished first-run tubes. A couple things I did wrong here: 1. The glass wasn't rolled at 45 degree angle! This increases the strength of the tube considerably. 2. When I wrapped the joiner bar/mylar/glass/mylar mandrel sandwich in thin cork, I didn't "spiral wrap" it like Drela says to. This caused a "lip" to form where I had started to wrap the layup! It could probably be sanded out, but I'm going to make another set. Note that the tubes together weigh 4 grams. The brass tubes weight approximately 12g!


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