Our rocket engines are built to customer specifications. Below is a selection of engines that illustrate some of our capabilities. Click on any engine class to learn more. (listed by order of thrust)
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XR-3B4, 50 lbf N2O/alcohol NRO Engine
This engine resulted from a National Reconnaissance Office (NRO) contract to develop a long-life, multi-start 50 lbf maneuvering rocket based on non-toxic propellants. The approach that we selected used regenerative cooling with nitrous oxide and isopropyl alcohol propellants. For this engine, XCOR designed, built, and tested a dual-cooled chamber with high temperature tolerance that employed both fuel and oxidizer as coolant.
This design demonstrated significantly enhanced heat transfer to the oxidizer – where roughly half the total waste heat is transferred to the oxidizer – and demonstrated sufficient heat transfer for long-term engine operation. With this project, we achieved a prototype, regeneratively cooled 50 lbf engine with unlimited lifetime and gained experience in stability and chamber design lessons that we have applied to our other engine developments.