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the claim
ULA's ACES upper stage uses internal combustion engines for power and propellant pressurization.
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
1 source for · 0 against
AS REPORTEDno primary record reached; this is what the reporting says

An encyclopedia reference reports that an internal combustion engine was designed to power the Integrated Vehicle Fluids (IVF) system on ULA's ACES upper stage.

Evidence for · 1
Advanced Cryogenic Evolved Stage
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an internal combustion engine to be used to power the IVF system on ACES was to be produced by Roush Racing. In August 2016, ULA's President and CEO The Advanced Cryogenic Evolved Stage (ACES) was a proposed liquid oxygen/liquid hydrogen upper-stage produced by United Launch Alliance (ULA). During the last five years of the program, ACES was proposed for eventual use on the Vulcan space launch vehicle designed by the U.S. company United Launch Alliance. The ACES concept had the objective to improve the on-orbit lifespan of current upper stages The…
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The analysis

rails:sufficiency:supported:single_source:for=1+0p:against=0+0p | v55:sufficiency

Everything we examined (1)
This check searched the claim as stated. It did not run a separate search for evidence against it.
  1. Advanced Cryogenic Evolved Stagereferenceno side taken
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