In the year 2000, various hot-firing tests with subscale (scale 1:5) and full-scale nozzle extensions for rocket engines were conducted.

• 在2000年，对火箭引擎进行了各种热发射实验，这种实验分别是用非全尺寸（比例为1：5）和全尺寸的延伸喷管进行。