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Music

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The thing that makes this really

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exciting for us in the avionics

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world is that this is the first

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time since the shuttle days that

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we're implementing a whole new

7
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avionics design that we're

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testing for the first time with

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an integrated static motor

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firing. Avionics boxes are

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essentially for the SLS

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configuration into sections of

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the vehicle. On the booster,

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they are in the forward skirt

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and then in the aft skirt. So in

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the QM-1 configuration, we have

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a rack that contains all the

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forward skirt avionics boxes and

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then mounted on one of the walls

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underneath the booster. So there

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are four booster control

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distribution units, and they

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control the actuators. Then we

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have ISCs, which control the

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pyrotechnic events. We have two

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of those, and then we have two

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HPUCs, that control the

28
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hydraulic power unit. The reason

29
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we have twos and fours of things

30
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is for fault tolerance. Unlike

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the shuttle program, all our

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power now is self-contained

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within the booster element

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itself, so we have multiple

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batteries that are separated by

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strings that are independent of

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each other. We are running off

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of a redesign of a heritage

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battery, and that test is

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underway right now to qualify

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for the new environments of the

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SLS rocket. QM-1 is going to be

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the opportunity to bring

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everything together in an

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integrated booster for the first

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time. It's really exciting to

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know that and be a part of that

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and know that it's all going to

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come together and have the

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opportunity to do that on a test