FS2004 NASA Tupolev TU-144 LL. Add-on package for the TU144 Classic (TU144CL2.ZIP). The TU144LL was equipped with more modern and powerful Kuznetzov engines and used by the NASA for supersonic test flights. Today the aircraft is back in Russia and grounded same as all the other TU144. This one was the last TU144 to fly. By Thomas Ruth and Claudio Mussner.