SpaceX Tests Crew Dragon with Redesigned SuperDraco Thrusters
takyon writes:
SpaceX fires up redesigned Crew Dragon as NASA reveals SuperDraco thruster "flaps"
On November 13th, SpaceX revealed that a planned static fire test of a Crew Dragon's powerful abort thrusters was completed without issue, a strong sign that the company has successfully redesigned the spacecraft to prevent a catastrophic April 2019 explosion from reoccurring.
Pending a far more extensive analysis, Wednesday's static fire should leave SpaceX on track to perform Crew Dragon's next major flight test before the end of 2019.
[...] Each capable of producing several dozen pounds of thrust, both Crew and Cargo Dragon use Draco thrusters to orient themselves in orbit, rendezvous with the International Space Station, and lower their orbits to reenter Earth's atmosphere. Crew Dragon's Draco thrusters are also designed to control its attitude during abort scenarios, stabilizing and flipping the spacecraft to prevent a loss of control and ensure proper orientation during emergency parachute deployment. The Draco firings during Crew Dragon's November 13th static fire were meant to simulate that additional use-case.
Aside from verifying that SpaceX has successfully redesigned Crew Dragon to mitigate the failure mode that caused capsule C201's catastrophic explosion in April 2019, the Draco static fires specifically mirrored the burns Crew Dragon C205 will need to perform to successfully complete its In-Flight Abort (IFA) test. As noted by NASA and SpaceX, with the static fire complete, both teams will now comb through the data produced, inspect Crew Dragon to verify its health and the performance of its redesigned high-flow pressurization system, and perform any necessary refurbishment.
NASA's post on Crew Dragon's static fire revealed another thoroughly intriguing detail: the SpaceX spacecraft's SuperDraco thrusters apparently have flaps! A bit of retroactive speculation suggests that SuperDracos are closed out with plugs of some sort to create a seal against the environment before Crew Dragon is rolled out to the launch pad. Perhaps, in the event of a SuperDraco ignition, SpaceX included actuating flaps as a method of resealing those thrusters prior to splashdown in the Atlantic Ocean.
Related: SpaceX Crew Dragon Suffers "Anomaly" During Static Fire Test
Investigation Into Crew Dragon Incident Continues
SpaceX and NASA Investigation Identifies Cause of Crew Dragon Explosion
NASA and SpaceX Hope for Manned Mission to ISS in Early 2020
Boeing Performs Starliner Pad Abort Test. Declares Success Though 1 of 3 Parachutes Fails to Deploy.
Read more of this story at SoylentNews.