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It's interesting to see so much similarity with BOR-4 (https://en.wikipedia.org/wiki/BOR-4 https://en.wikipedia.org/wiki/BOR-4 and http://buran.ru/htm/bors.htm
by avmich 2y ago
It's interesting to see so much similarity with BOR-4 (https://en.wikipedia.org/wiki/BOR-4 https://en.wikipedia.org/wiki/BOR-4 and http://buran.ru/htm/bors.htm http://buran.ru/htm/bors.htm), particularly foldable wings. Surely DC is bigger and much more polished, but it's still reminding of the past programs.
- icegreentea2 2y agoIt's not explicitly clear (in english) from your links, but there is true design lineage from BOR to Dreamchaser. The HL-20 mold line was derived from spy plane imagery of BOR-4, and HL-20 was then the design basis for Dreamchaser. https://sacd.larc.nasa.gov/vab/vab-projects/hl-20/ https://sacd.larc.nasa.gov/vab/vab-projects/hl-20/
- avmich 2y agoThere's a long chain of influences across the border in winged spacecraft development. Dyna-Soar (https://en.wikipedia.org/wiki/Boeing_X-20_Dyna-Soar https://en.wikipedia.org/wiki/Boeing_X-20_Dyna-Soar) project in USA pushed works on Spiral' project in USSR, and BORs are a part of that. It arguably provides a link from HL-10 via USSR projects to HL-20, among other things.