According to CCTV-13, there is only one EVA onboard Tianzhou-3. It is to be a backup for the existing two. As I see it, EVA must be done by two crews for safety reasons, so two suits is a minimum which must be backed up by a spare suit.Are those new EVA suits upgraded? 2 EVA suits still remained on CSS, why sending 2 new?
Is there a misunderstanding? It could be that your colleague meant that Tianzhou-3 will conduct a test dock by the robotic arm on Tianhe, not itself carrying a new robotic arm.Rumour from colleague,Tianzhou 3 has a robotic arm
Two laboratory modules will be launched next year. Thereafter there may be two crew ships docked and six astronauts resident in the space station. So it's necessary to keep more suits for more frequent EVAs and backup.Are those new EVA suits upgraded? 2 EVA suits still remained on CSS, why sending 2 new?
Could be the case, he himself heard it from another departmentIs there a misunderstanding? It could be that your colleague meant that Tianzhou-3 will conduct a test dock by the robotic arm on Tianhe, not itself carrying a new robotic arm.
There seems to be no mounting port for robotic arm on Tianzhou. The plan was to have one of the lab modules carrying another arm.