Update on what SpaceX learned about Starship’s tiles during the 10th test flight
Superheavy after the October 2024 flight,
safely captured during the very first attempt
Link here. The update comes from a presentation given this week by Bill Gerstenmaier, SpaceX’s executive in charge of build and flight reliability, at the American Astronautical Society’s Glenn Space Technology Symposium in Cleveland.
Lots of new details. First, almost no tiles fell off during this flight. More significant, they found that the use of metal tiles won’t work. They tested three, and found that “The metal tiles… didn’t work so well.”
Gestenmaier also outlined how the flight provided the necessary data for sealing the gaps between the tiles better.
Gerstenmaier pointed to a patch of white near the top of Starship’s heat shield. This, he said, was caused by heat seeping between gaps in the tiles and eroding the underlying material, a thermal barrier derived from the heat shield on SpaceX’s Dragon spacecraft. Technicians also intentionally removed some tiles near Starship’s nose to test the vehicle’s response.
“It’s essentially a white material that sits on Dragon and it ablates away, and when it ablates, it creates this white residue,” Gerstenmaier said. “So, what that’s showing us is that we’re having heat essentially get into that region between the tiles, go underneath the tiles, and this ablative structure is then ablating underneath. So, we learned that we need to seal the tiles.”
They hope to do the 11th test flight in October, repeating the same suborbital configuration of previous flights, using the same version 2 of Starship. The plan will then be to follow up with a first suborbital flight of version 3 in 2026, followed quickly by orbital flights. During one of those orbital flights they will also try to do a chopstick catch of Starship. They also hope to do the first refueling tests next year.
All in all, it appears the test program is proceeding as hoped, and is about to accelerate significantly.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The print edition can be purchased at Amazon or from any other book seller. If you want an autographed copy the price is $60 for the hardback and $45 for the paperback, plus $8 shipping for each. Go here for purchasing details. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
Superheavy after the October 2024 flight,
safely captured during the very first attempt
Link here. The update comes from a presentation given this week by Bill Gerstenmaier, SpaceX’s executive in charge of build and flight reliability, at the American Astronautical Society’s Glenn Space Technology Symposium in Cleveland.
Lots of new details. First, almost no tiles fell off during this flight. More significant, they found that the use of metal tiles won’t work. They tested three, and found that “The metal tiles… didn’t work so well.”
Gestenmaier also outlined how the flight provided the necessary data for sealing the gaps between the tiles better.
Gerstenmaier pointed to a patch of white near the top of Starship’s heat shield. This, he said, was caused by heat seeping between gaps in the tiles and eroding the underlying material, a thermal barrier derived from the heat shield on SpaceX’s Dragon spacecraft. Technicians also intentionally removed some tiles near Starship’s nose to test the vehicle’s response.
“It’s essentially a white material that sits on Dragon and it ablates away, and when it ablates, it creates this white residue,” Gerstenmaier said. “So, what that’s showing us is that we’re having heat essentially get into that region between the tiles, go underneath the tiles, and this ablative structure is then ablating underneath. So, we learned that we need to seal the tiles.”
They hope to do the 11th test flight in October, repeating the same suborbital configuration of previous flights, using the same version 2 of Starship. The plan will then be to follow up with a first suborbital flight of version 3 in 2026, followed quickly by orbital flights. During one of those orbital flights they will also try to do a chopstick catch of Starship. They also hope to do the first refueling tests next year.
All in all, it appears the test program is proceeding as hoped, and is about to accelerate significantly.
On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.
The print edition can be purchased at Amazon or from any other book seller. If you want an autographed copy the price is $60 for the hardback and $45 for the paperback, plus $8 shipping for each. Go here for purchasing details. The ebook is available everywhere for $5.99 (before discount) at amazon, or direct from my ebook publisher, ebookit. If you buy it from ebookit you don't support the big tech companies and the author gets a bigger cut much sooner.
The audiobook is also available at all these vendors, and is also free with a 30-day trial membership to Audible.
"Not simply about one mission, [Genesis] is also the history of America's quest for the moon... Zimmerman has done a masterful job of tying disparate events together into a solid account of one of America's greatest human triumphs."--San Antonio Express-News
Well, phooey.
The VentureStar was to use metal tiles–Iconel or something.
Being wide (due to hydrolox) it was somewhat fluffy–less wing-loading I would imagine.
I know that I am going to get blow-back from this, but the idea of the External Tank wet-workshops needs to be looked at, again.
I would suggest a return of the top cargo carriers looked at for use on ETs, and the Zubrin-Ares with only engines and avionics being returned in a small pod.
Only that pod would need heat-shielding.
SH is captured via chopsticks–but Starship is only the top cargo carrier.
Once free from the inert tankage, it’s pristine heat shield that was free from exposure during ascent can be deployed–preferably a very wide LOFTID type inflatable structure good for Earth, Mars, and Venus payloads.
Only lunar Starship stays in one piece as its own depot for dual use.
Lunar Starship is flat up top–to be a big spacecraft bus to shove payloads out of Earth orbit. A small burn allows the bus to loop around the Moon and return
Rocketship XM is dead.
Apollo’s lessons are forever.