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First you have to cut it in half, and add the metalized interior partition that becomes the parabola. Then plastic weld all the seams, putting it back together
by mikewarot 3y ago
First you have to cut it in half, and add the metalized interior partition that becomes the parabola. Then plastic weld all the seams, putting it back together into a bisected sphere.
If you pressurize both halves correctly, with the right differential, Bob's your uncle.
If you have the means to weld seams in Mylar, it would likely be easier to build one from scratch.
- pokey00 3y agoWhy cut it in half? Spray (or Mylar) on the outside.
- wtallis 3y agoA parabola isn't the same shape as a hemisphere. (Although, I'm not convinced the antenna under discussion actually is a parabola and not a catenary, or something in between.)
- djcannabiz 3y agoSome other comments posted a diagram-the actual reflector is inside the balloon. the balloon is there to keep the reflector in the right shape.