Klingler, Dave (6 september 2012). 50 years to orbit: Dream Chaser's crazy Cold War backstory: The reusable mini-spaceplane is back from the dead—again—and prepping for space. ars Technical. Geraadpleegd op 7 september 2012. “The crucial difference, though, is that most hybrids are storable—that is, they can sit on the shelf (or in space) and their propellants don't degenerate, dissipate, or explode. Benson's team decided to outfit the Dream Chaser with hybrid engines, choosing HTPB (Hydroxyl-terminated polybutadiene) and nitrous oxide—or, as he used to say in presentations, 'rubber and laughing gas.' The motors are similar to those that SpaceDev designed for SpaceShipTwo, Virgin Galactic’s suborbital space tourist vehicle. Dream Chaser would not only have the ability to propel itself, but also to sit up in orbit for a long time and then wake up and propel itself again. ... onboard propulsion solves three big issues. First, it provides an abort system in case something goes wrong on the launchpad, a necessary part of every manned rocket. Second, it means no "black zones" on the ascent. (Black zones are portions of the launch where a vehicle malfunction will result in the loss of the crew due to structural failure, and the fact that Dream Chaser doesn't have any is a big plus for safety.) Finally, it gives Dream Chaser the flexibility to make a last-minute change to its landing location on the way down, making it possible to land in a thousand-mile range around the original planned location.”.
OIG Staff (26 april 2018). Audit of Commercial Resupply Services to the International Space CenterIG-18-016: 27–28 (NASA). Geraadpleegd op 11 december 2023. “In August 2017, ISS Program officials said Sierra was considering building a second Dream Chaser to be completed by 2021, but no decision had been made as of October 2017. In the event of a failure, Sierra officials told us in June 2017 that a second spacecraft could be built from spare parts without additional costs to NASA.”.
