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spacex has begun installing new raptor 2 engines on super heavy booster 7 after the prototype
completed a range of tests and returned to the company's south texas starbase rocket factory
earlier this month spacex transported booster 7 in the opposite direction returning the 220 foot tall
rocket to starbase orbital launch site for the second time after it was forced to head back to
the factory for repairs repairs completed spacex dove headfirst into the process of verifying that
the booster had been returned to full health and immediately filled its tanks to the brim
with at least 3 000 tons of liquid nitrogen and oxygen better known as a cryogenic proof test
less than 48 hours after completing its first post repair test booster 7 sailed through another
full cryoproof test without losing a beat on may 13th two days later spacex attached a
crane to super heavy b7 and removed it from the orbital launch mount before rolling the rocket
back to starbase build site on may 14th without official confirmation which is increasingly rare
it was impossible to determine the results of the testing with certainty but the speed of the
process and booster 7's rapid launch mount removal made the two most extreme outcomes the most likely
a quick return to the build site could have been explained by a significant vehicle failure
or a major issue with spacex's repair job no point in continuing to test a vehicle that
can't be fully tested on the exact opposite hand a near perfect test campaign in which
all objectives were more or less achieved without major hiccups could also explain the quick return
in general the evidence was in favor of the more optimistic explanation
had a major issue been uncovered during the first post repair cryoproof it's difficult
to imagine that spacex would have completed the exact same test in full less than 48 hours later
however spacex moved an in-situ raptor engine installation stand towards booster 7 and the
orbital launch mount shortly before testing restarted hinting for the moment that the
company wanted to begin installing raptor engines immediately after cryoproof testing
but midway through testing the stand was moved back to its storage area and super heavy was
instead removed from the mount and returned to the factory adding a little uncertainty concerns were
immediately assuaged on may 17 when spacex was spotted moving raptor engines from a production
tent to the mega bay assembly building containing booster seven while the location of the new bay
makes it difficult to peek inside from public viewpoints preventing direct confirmation it's
very likely spacex has begun installing new raptor two engines on super heavy b7
additionally confirming some of the more optimistic speculations about spacex's decision
to move booster seven back to the build site two of the three raptor engines spotted on may 17 were
also labeled d26 and e28 unless spacex's engine numbering conventions have changed the labels
identify the engines as three of 20 raptor boost engines that will ultimately populate the outer
ring of super heavy b7s after end more importantly the installation of any raptor boost two engines
likely indicates that spacex has decided to install a full set of 33 raptors on the booster
before kicking off static fire testing to limit risk spacex could have begun test firing booster
7 with just one two three raptor engines installed and gradually added more as confidence grew
instead spacex appears to have accepted the added risk of losing 33 brand new raptor
two engines in one fell swoop in return for the possibility of a much faster test campaign
if there are no major surprises during static fire testing in other words booster 7 could be
ready for flight far more quickly if the process begins with all 33 engines already installed
installing booster 7's raptors heat shield and arrow covers will be easier back at the build site
doing it all at once should also help prevent booster 7 from suffering booster force fate
and wallowing unfinished for months without completing a single useful test
if the gamble works the first stage of a two-stage starship could be ready for an
orbital launch attempt in just a few months if the gamble fails and booster 7 is damaged
destroyed or otherwise unable to pass the necessary tests spacex will simply move on
to booster 8 sooner than later having wasted less time on a more cautious booster 7 test campaign
it's unclear how long it will take spacex to install all 33 raptors construct a heat shield
around those engines and finish buttoning up the rest of booster 7. in an adjacent assembly bay
spacex appears to have nearly finished assembling a similarly upgraded starship ship 24 that's first
in line to ride booster 7 into space spacex has also mentioned a possible closure for may 25th
as boeing cst 100 starliner prepares to return from its brief trip to the international space
station nasa officials say they'll wait until this summer to determine a schedule for the
vehicle's first crude flight and the astronauts who will fly it nasa said on may 23 that it would
proceed with plans to have starliner return to earth on may 25th six days after its launch on
the orbital flight test oft to uncrude mission the astronauts on the iss will close starliner's
hatch on may 24th with undocking about 24 hours later at 2 36 p.m eastern on may 25th
that would allow starliner to land at white sand space harbor in new mexico at 6 49 pm eastern
that day in pre-launch briefings nasa officials declined to set a date for the next test flight
the crew flight test cft which will carry people for the first time the schedule
they said will depend on any modifications to the spacecraft that emerged from oft2
the current mission has experienced several minor issues with malfunctioning thrusters and cooling
systems none serious enough to alter the mission one of the things we have to do is do this mission
kathy litters nasa associate administrator for space operations set of oft 2 at a may 18 briefing
we know we'll have to learn out of this mission and then lay that into our plans
and our schedule with the boeing folks she anticipated knowing more details about cft
in the summer that includes determining who will fly on cft nasa announced in october 2021 that
nicole mann who had been previously assigned to cft would instead fly on the crew 5 crew dragon
mission to the iss scheduled for launch this september nasa also reassigned josh casada who
previously was set to fly on the first operational starliner mission called starliner 1 to group 5.
at the time nasa said it was keeping the other two veteran astronauts on cft
mike fink and butch wilmore with suny williams also remaining on starliner one with jeanette
epps but at the may 18th briefing fink wilmore and williams said they were training together
as a cadre that could go on either mission we had a launch attempt with a valve issue back in
late july early august of last year that changed things wilmore said referring to the initial oft 2
launch attempt that was postponed because of stuck propellant valves in the spacecraft service module
since that time in august the three of us have been working as a cadre supporting starliner
and we know we are not necessarily assigned to cft looters said nasa would consider crew
assignments for other crude missions coming up in the next year before assigning astronauts to cft
you realize the challenge the crew office has about the assignments and why it's important to
get the right timing and understand when exactly the crew flight test is going to show up there are
no plans she added to fly a boeing astronaut on cft the mission originally included chris ferguson
a former nasa astronaut who now works for boeing as a commercial astronaut with two nasa astronauts
however ferguson dropped out of the mission in october 2020 citing family obligations when cft
was anticipated for 2021 wilmore replaced ferguson on the mission if cft solely serves
as a test flight loader said it will probably last only five to seven days spacex's crew test flight
demo two spent two months at the station in 2020 to provide additional crew given only
three people were at the station at the time the mission will have a minimum of two people she said
another factor for planning future cruise is a still pending agreement with rose cosmos that will
allow russian cosmonauts to fly on commercial crew vehicles in exchange for nasa astronauts going on
soyuz spacecraft agency officials say they remain hopeful in agreement can be reached in time for a
russian cosmonaut to be on the crew 5 mission launching in early september it's not clear
though when rose cosmos would be willing to allow cosmonauts to fly on starliner
given that agency's initial reticence to flying cosmonauts on crew dragon until it performed
several crude flights they're going to want to see the results from our test flights and they're
going to want us to finish cft and then we'll have similar conversations dana weigel nasa iss deputy
program manager said may 17th that could make crew swaps challenging if rose cosmos is willing to
fly cosmonauts on crew dragon but not starliner given nasa's plans to alternate commercial crew
missions between the two spacecraft once starliner is certified it's another complexity going forward
loaders acknowledged with the agency hoping to know fairly quickly when rose cosmos would allow
cosmonauts to go on starliner it's another piece of the puzzle and that wraps up today's episode
we did also like to take the time to thank you for your continuous support of spacex community and
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