Sukhoi/Gulfstream supersonic business jet

A while beck someone sold a brochure about the Sukhoi-Gulfstrem supersonic business jet, the S-21. This concept, dating from the early 90’s, was a failed attempt to build a corporate-jet sized SST. While Gulfstream eventually dropped out, Sukhoi kept going until around 2012. The design changed substantially as time went by, but the realities of the economics of supersonic small aircraft around the turn of the century doomed the idea.

Source: http://www.aerospaceprojectsreview.com/blog/?p=4615