Don't worry Patrick, you're talking about a 4 sensor, daylight launch only, space agency. There are probably backup bolts somewhere. Quoting Patrick Wiggins <paw@trilobyte.net>:
Watching NASA TV a few minutes ago I heard something that really got my attention.
All of us space geeks on this list probably know that during a shuttle launch the SMEs light first and then there is a few seconds delay before they light the SRBs.
What I did not know is that after they light the SMEs but BEFORE they light the SRBs the explosive bolts that hold the whole shuttle stack in place on the ground are detonated.
Made me wonder what would happen if the SRBs did not light. The guy conducting the briefing must have guessed people were wondering that as he quickly noted they are very confident the SRBs will light.
Patrick
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