Tu-144D Range

The ranges for the Tu-144D are too low, current max payload range is is 2,484 miles with nothing being able to be carried past 3,312 miles. However, 3,312 miles was maximum range with 15 tonnnes (150 pax) payload, and at 7 tonnes (70 paxs) it could travel 6,200 km (3,853 miles). So if this could be corrected and pushed by Yuxi so that I can fly the historical routes with this aircraft that'd be great

Sources:

http://www.tu144sst....erformance.html

http://www.tupolev.r...ircrafts/tu-144 (scroll to bottom)