Why Blue Origin’s rocket landing shouldn’t be compared to SpaceX
Why Blue Origin’s rocket landing shouldn’t be compared to SpaceX
2015-12-04
Blue Origin sent shockwaves to the space
community when it announced it had
landed its new Shepard rocket after
saying it to the edge of space it's the
first time a commercial vertical rocket
has taken off from the ground gone to
suborbital space and then landed
vertically back on earth again the feat
was immediately compared to what SpaceX
has been trying to do all year
the Elon Musk led company has tried
twice to land the first stage of its
Falcon 9 rocket after launching it into
space and the company hasn't had much
luck in sticking the landing but is it
really fair to compare the two companies
Landing techniques not exactly for
starters the first stage of the Falcon 9
is tall and thin to create less drag
when it's leaving earth we don't know
the exact height and width of new
Shepard but it looks like it's about
half the length of the Falcon 9 first
stage so overall it's a bit shorter and
a bit more squat that still doesn't make
it easy to land but it's better for
balance the Falcon 9 first stage goes to
124 miles above Earth before it detaches
from the rest of the rocket and returns
to the ground new Shepard goes to 62
miles above Earth before it comes back
about half that distance the Falcon 9 is
also going a lot faster between Mach 5.5
and Mach 7.5 when it starts his descent
new Shepard only reaches Mach 3 and the
Falcon 9 has more than 1.5 million
pounds of thrust behind it while new
Shepard reaches a maximum thrust of a
hundred thousand pounds the two Rockets
are just very different vehicles with
very different purposes the Falcon 9 is
meant to launch payloads like satellites
into lower Earth orbit while new Shepard
is meant to take passengers to the edge
of space so they can experience
weightlessness for four minutes
so the paths of the vehicles take are
drastically different the Falcon 9 takes
an arc trout into space SpaceX has to
flip the first stage vertical again in
order to land that makes it a bit harder
to land it's prone to fall over new
Shepard stays mostly vertical during the
entire trip what Blue Origin did is a
huge achievement
but saying that it accomplished what
SpaceX is trying to do isn't exactly
accurate plus depending on how you
define the word rocket this isn't the
first commercial vehicle to come back
from space intact still the bottom line
is clear the future of rockets is
definitely reusability
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