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hi I'm Nick case and I work here at

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Marshall Space Flight Center in the

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propulsion systems department and today

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I'm going to talk to you about our

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additively manufactured demonstrator

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engine that we currently have built up

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here at testa and 116 this is what we

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call a breadboard engine configuration

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and so a lot of it is all spread out to

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give us more room to put instrumentation

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and specific sensors are trying to get

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as much data as we can on our added li

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manufacture parts and I'll start off

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with our our fuel turbopump so this pump

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is for liquid hydrogen and that is at

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minus 423 degrees Fahrenheit and it

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produces over 2,000 horsepower spins at

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90,000 rpm and the majority of all these

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parts here are added li manufactured the

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only things that we don't have our seals

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and bearings and we just completed 15

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tests on this this component and now

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we're ready to incorporate it into the

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engine over here we have our main fuel

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valve and so with this this valve does

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it allows the liquid hydrogen coming out

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of the turbo pump into our mixer which

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is also added li manufacture and we are

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able to mix liquid hydrogen and gaseous

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hydrogen together to send into our

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injector which is behind here that

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injector is also added li manufactured

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and it's one of the largest injectors

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that we've ever we've ever printed here

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at NASA on the back side of the injector

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is our ablative chamber and this will

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allow us to do a short duration test and

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it's a pretty cheap to make and and it

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helps us with schedule and so we'll use

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that for our first Test series we also

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have a regenitive Li cooled chamber that

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is being 3d printed right now that we'll

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use for our later Test series over here

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on the other side is our oxygen system

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and it starts with the the main oxidizer

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valve back here which is 3d printed we

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currently don't have a oxygen pump on

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the system that's currently being built

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right now we're using our pressurized

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tanks in the facility to provide our

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flow for the oxygen system downstream of

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that is our turbine bypass and turbine

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discharge valve which will take the

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gaseous hydrogen

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the turbine and discharge it out through

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this nozzle for for our test program and

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so this this valve and this this bowl

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are both 3d printed so overall this

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additively manufactured demonstrator

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engine contains over 75% additively

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manufactured parts for a future rocket

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engine design and we intended to test

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this breadboard engine for a total of 10

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tests and liquid hydrogen and liquid

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oxygen and in the future we'll do 10