Products OverviewArchived 2010-11-25 at the Wayback Machine, XCOR Aerospace, undated, accessed 2010-12-27. "Twin 400 lb-thrust XR-4A3 engines aboard the EZ-Rocket" (with in-flight photograph) ... "Another engine that we have developed in parallel is the XR-4K14, ... a 1,500 lb thrust regeneratively cooled LOX and pump-fed kerosene system ... used as the Rocket Racer aircraft's main engine."
Products OverviewArchived 2010-11-25 at the Wayback Machine, XCOR Aerospace, undated, accessed 2010-12-27. "Twin 400 lb-thrust XR-4A3 engines aboard the EZ-Rocket" (with in-flight photograph) ... "Another engine that we have developed in parallel is the XR-4K14, ... a 1,500 lb thrust regeneratively cooled LOX and pump-fed kerosene system ... used as the Rocket Racer aircraft's main engine."
