General Category > Space
SpaceX Starship IFT-4
Elderberry:
SpaceX Just Completed Starship's FINAL Test before Flight 4!
Matt Lowne May 20, 2024
SpaceX are rapidly approaching T-0 for the fourth orbital launch attempt of the Starship integrated flight vehicle! Earlier today, they completed an apparently successful wet dress rehearsal, which means very little is left to do before launch, exciting times! Elsewhere, we saw the very first 21st launch and landing of a Falcon 9 first stage, Blue Origin’s grand return to crewed flight, China adds to its Beijing 3C constellation, and much, much more. Enjoy!
https://www.youtube.com/watch?v=R9ZbOsF7m7o
Elderberry:
SpaceX fuels up Starship megarocket ahead of 4th test flight (photos)
Space.com by Mike Wall 5/20/2024
The "wet dress rehearsal" apparently went well.
SpaceX just fueled up its giant Starship rocket, checking another box ahead of the vehicle's fourth test flight.
The company performed a "wet dress rehearsal" with Starship at its Starbase site in South Texas today (May 20), filling both of the vehicle's stages with supercold liquid oxygen and liquid methane in a key prelaunch test.
"Launch rehearsal for Flight 4 complete," SpaceX said in a post on X today, which also shared four photos of the procedure.
More: https://www.space.com/spacex-starship-wet-dress-rehearsal-fourth-flight
Elderberry:
SpaceX Confirms Starship Launch Date! Flight 4 Ready!
What about it!?
https://www.youtube.com/watch?v=3rCiv17UKSE
Elderberry:
SpaceX: Starship Hot-Stage Ring Was a Big Mistake! Can Cause Failure - IFT 3 & IFT 4
SpaceX Community
SpaceX: Starship Hot-Stage RIng Ejection Is a CRITICAL FIX. Can Cause Failure - IFT 3 & IFT 4
In SpaceX’s latest blog post on the Flight 3 report and upcoming changes for Flight 4, they mentioned: "Upgrades derived from the flight test will debut on the next launch from Starbase on Flight 4, as we turn our focus from achieving orbit to demonstrating the ability to return and reuse Starship and Super Heavy. The team incorporated numerous hardware and software improvements in addition to operational changes, including the jettison of the Super Heavy’s hot-stage adapter following boost back to reduce booster mass for the final phase of flight."
So, what is meant by hot-stage adapter jettison? Before directly addressing that, let’s go back to Flight 2. After Flight 1, SpaceX introduced the concept of hot-stage separation for the Starship Super Heavy to increase the efficiency and payload capacity of the spacecraft. In this method, most of the 33 Raptor engines on the Super Heavy booster are turned off, but a few remain firing when the engines on the Starship upper stage are ignited. This avoids the loss of thrust during traditional stage separation, where the lower stage shuts down first.
The hot-stage separation involves the Starship firing up its own six engines to push itself away from the Super Heavy booster. To make this method safe for the booster, an additional ring section was installed on Starship's interstage to direct the blow of the engines. This method could potentially increase Starship's payload-to-orbit capacity by 10%.
Now, why do they want to jettison this additional ring section? I think this change is part of a broader effort to reduce the mass of the Super Heavy booster. A fully fueled booster has a mass of up to 3,500 tons. After liftoff, the mass reduces as the propellant is used up. During its return phase, it would barely have the fuel for the boost-back burn and landing. As you know, for the Falcon 9, SpaceX mentioned that they only keep the fuel necessary for the same process. This is done to reduce the mass of the rocket as much as possible. This same principle applies to the Super Heavy booster too, but additionally, if they could remove some more mass that significantly doesn’t contribute to the landing process, isn’t it good to remove that? Of course, it is. That’s the reason why they are jettisoning the hot-stage adapter. By jettisoning, SpaceX aims to minimize the risk of potential difficulties during landing and maximize the chances of successful recovery and reuse with improved control over the booster. The HSR ejection will occur shortly after the boost-back burn shutdown process.
https://www.youtube.com/watch?v=JcNeU9MSC8w
Elderberry:
SpaceX Big New Update On Starship Flight 4: Trajectory & Countdown!
GREAT SPACEX
https://www.youtube.com/watch?v=SSMGE0NDBRM
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version