This task is to hot-fire test an existing Space Launch Mission (SLM) injector that is applicable for all expander cycle engines being considered for the exploration upper stage. The work leverages investment made in FY 2013 that was used to additively manufacture three injectors (fig. 1) all by different vendors.

Barnett, Greg

Nettles, Mindy

Turpin, Jason

NASA Technical Reports Server

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Project Manager(s)/Lead(s) 
Greg Barnett/ER32
(256) 544–3670
Jason Turpin/ER21
(256) 544–2807
Mindy Nettles/XP50
(256) 544–1569
Sponsoring Program(s) 
Human Exploration and Operations Mission Directorate
Space Launch System Advanced Development
Project Description 
This task is to hot-fire test an existing Space Launch Mis-
sion (SLM) injector that is applicable for all expander 
cycle engines being considered for the exploration 
upper stage. The work leverages investment made in 
FY 2013 that was used to additively manufacture three 
injectors (fig. 1) all by different vendors.
Figure 1: Manufactured LOX/H2 injectors.
Hot-Fire Test of Liquid Oxygen/Hydrogen 
Space Launch Mission Injector  
Applicable to Exploration Upper Stage
Notable Accomplishments 
Accomplishments include selecting two of the injec-
tors to use for hot-fire testing, performing nondestruc-
tive evaluation on the original SLM injectors, final 
machining, welding on the Rigimesh® face plate, water 
flow testing, fabricating the ablative chambers used to 
support testing, test facility buildup, writing the Test 
Requirements Document and successfully completing 
the Test Readiness Review, performing facility leak 
checks and blow-down testing, and hot-fire testing 
injectors (fig. 2).
References 
Crumbly, C.M.; Bickley, F.P.; and Hueter, U.: “Space 
Launch System Spacecraft/Payloads Integration and 
Evolution Office Advanced Development FY 2014 
Annual Report,” NASA/TM—2015–218201, NASA 
Marshall Space Flight Center, Huntsville, AL, 
January 2015.
https://ntrs.nasa.gov/search.jsp?R=20160008015 2019-08-29T23:45:41+00:00Z
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Figure 2: Water flow and hot-fire testing of two LOX/H2 SLM injectors.
SLS A
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Hot-Fire Test of Liquid Oxygen/Hydrogen Space Launch Mission Injector Applicable to Exploration Upper Stage

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