AS-202 S-IB/S-IVB Stage Separation.
AS-202 S-IB/S-IVB Stage Separation.
The video is slowed down, in reality the time from the separation to the J-2 firing was under 4 seconds.
The S-IVB is the stage that put Apollo capsules on the lunar transfer orbit. Note that this is a Saturn IB upper stage, meaning this one never actually went to the moon, and only put the yet unmanned spacecraft on an suborbital trajectory.
The three small rockets are the ullage motors, small solid rockets used to create small acceleration, so the fuel settles own in the bottom of the tank and starts being fed into fuel pumps
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And this time a S-Ic S-II separation from the FREAKING APOLLO 11! The same rocket that put men on the Moon! This time from the external perspective (also known as “staying on the ground, NOT GOING TO THE FREAKING MOON!”).
As before, expect fanboying and trivia below.
You can see the first stage (S-Ic) cutoff, as a sudden decrease in the size of the exhaust plume. At that time, only four outboard engines were firing, the center one was shut down as expected, to prevent pogo oscillations (oscillations + rockets != good_things)
The big explosion was just the stage separation. Using explosives to separate huge stacks of explosives. Surprisingly a good idea.
Even though the S-Ic engines were already shut down, they still produced some leftover exhaust, which you can easily see
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