Comments by "Helium Road" (@RCAvhstape) on "Curious Droid"
channel.
-
15
-
15
-
15
-
14
-
14
-
14
-
13
-
13
-
13
-
12
-
12
-
12
-
12
-
12
-
11
-
11
-
11
-
11
-
11
-
11
-
11
-
11
-
11
-
10
-
10
-
10
-
10
-
10
-
9
-
9
-
9
-
9
-
9
-
9
-
9
-
8
-
8
-
8
-
8
-
8
-
8
-
8
-
8
-
7
-
7
-
7
-
7
-
IIRC the orbiter's tile heat shield system was the biggest expense in terms of time between flights. All those tiles had to be inspected, many replaced, and it was painstaking manual labor that cost a lot of time and money. The main engines were expensive to maintain, too, but they had a rotating pool of engines to swap out after each flight; while some were being torn down and refurb'd there were good ones available off the shelf, so the engines did not cause as many headaches as the heat shield. There were also a lot of other, smaller things that added up; swapping the windshield glass after every flight, for example, or even the tires after every landing. These things were technically good for many flights but NASA was trying to eliminate as many sources of accidents as was practical, and compared to O-ring redesign or debris shedding, these little things were easy to do.
7
-
7
-
7