A day after receiving the FAA's approval for Starship Flight 9, SpaceX confirmed that Starship Flight 9 could fly as soon as Tuesday. The firm also shared the reasons behind Flight 8's failure and outlined that the upper-stage ship failed due to problems with the Raptor engine. The cause of failure for Starship Flight 8 is distinct from Flight 7 despite the fact that the upper-stage ship on the two flights failed at approximately the same time. SpaceX adds that it will test the upper stage ship for reuse during Flight 9 and conduct extensive tests on the Super Heavy booster.
SpaceX Will Extensively Test Super Heavy Booster For Efficiency & Range During Starship Flight 9
Starship Flight 9 will mark the first time in the program that SpaceX reuses a Super Heavy booster. However, SpaceX's latest update reveals that booster reuse is only one of the ambitious objectives planned for Flight 9. According to SpaceX, the booster will perform a "controlled" flip, fly at a higher angle of attack and disable a center engine during the landing burn.
The new flip maneuver will involve blocking some vents of the interstage located between the Super Heavy and the upper-stage Starship on the Starship rocket. The interstage protects the booster from the ship's engine thrust during separation, and according to SpaceX, the blocked vent will allow the booster to conserve fuel and increase its range.
The higher angle of attack, which will lend the Super Heavy a flatter landing profile, will increase the drag on the rocket and reduce its landing speed. According to SpaceX, the reduced speed will allow for higher fuel efficiency. The different angle will enable SpaceX to test different control profiles for the rocket and inform the design of the next-generation Super Heavy booster.
Finally, during the rocket's landing, SpaceX will disable one of the three center engines to determine how well a backup engine performs. As a result, the firm will not catch the Super Heavy with the launch tower on Starship Flight 9.
Along with the booster, Starship Flight 9 will also ambitiously test the upper-stage ship. SpaceX has confirmed that all flight objectives for the ship on Flights 7 and 8 will remain on Starship Flight 9. SpaceX will remove certain heatshield tiles to test vulnerable regions and use upgraded tiles in some areas to evaluate their performance. The ship will also feature fittings for future return-to-tower mission profiles for the Starship upper-stage spacecraft, and in-space engine firing and satellite simulator deployments are also planned for Starship Flight 9.
According to SpaceX, the Starship Flight 8 failure was caused by propellant mixing in a Raptor engine. This probable cause is different from the reason behind Flight 7's failure, which was due to vibrations in the ship's propellant system. In fact, according to SpaceX, "mitigations put in place after Starship's seventh flight test to address harmonic response and flammability of the ship's attic section worked as designed prior to the failure on Flight 8."
SpaceX added that "more than 100 long-duration Raptor firings at SpaceX's McGregor test facility" have been conducted to upgrade the ship's design and ensure similar failures do not occur on Starship Flight 9.
About the author: Ramish is a seasoned technology writer and editor with more than a decade of experience. He specializes in semiconductor fabrication and market analysis. With a background in finance and supply chain management - via his bachelors in Finance and a micromasters in supply chain management from MIT - Ramish combines financial rigor with deep industry insight to deliver accurate and authoritative coverage.
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