Half Tube Solargraph
Description
This is a simple half tube solargraph, that I made for my friend. Designed an easy to mount design, with flat back surface and fixing holes for self-locking nylon cable ties or Hilti ribbon. This is the first version of the solargraph, I will make another one in the future with mounting holes for wood screws. Also, there will be another one as well with 2,0mm wall thickness. Dimensions: Diameter (of the tube): 60 mm Height: 100 mm Focal point distance from outer wall: 29 mm (with ~0,244mm hole) Wall thickness: 1,5 mm Photosensitive paper used: Fomaspeed N311 Paper dimensions: 86 x 92 mm I made two versions of bottom covers. One simple press-fit cover, and one with groove for sealing gasket. For sealing, I used a simple rubber belt that suitable for repairing old cassette decks. With light pressure, the gasket equipped cover slides in, and keeps moisture out. Feel free to use it, I hope this will work as good as it worked for us. 2 week test results in the attached picture. Enjoy!
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