INTERSECTOR SHELL UPDATE

摘要

A while back in a previous AFN article I described a method of using a round shell to project two intersecting rings of stars.Perfecting this type of shell has become an obsession with me ever since.Over the last year,I have simplified the construction methods and improved the performance considerably.The current method of construction of a 4-inch intersector begins with the formation of a set of hemispheres.I make the hemispheres by pasting four layers of 40 lb Kraft on a plastic-wrapped set of commercial hemispheres.The hemisphere construction method was discussed in detail in a previous article on Palm Tree Shell Construction.