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This answer to Saturn V Small Rectangles On S-II Stage includes images and links related to the Saturn IB rocket. It shows what I think is an unwrapped representation of part of a circumference which proceeds from Fin 4, 5, 6, 7, 8, and then Fin 1.

Question: Did the Saturn IB have eight equally spaced fins around its circumference? If not what is it that this drawing is showing?

enter image description here

Indiscriminately cropped from here; [Source][2] APOLLO/SATURN CONSOLIDATED INSTRUMENTATION PLAN FOR AS-204/LM-1 pp 3-5 & 3-6

uhoh
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1 Answers1

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Indeed it did as shown in this drawing.

enter image description here

Source (annotation mine)

Organic Marble
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    I'd thought that I was misunderstanding the drawing, and the first images I pulled up all had smoke and fire obscuring the base of the rocket, so I was surprised to see that there really are eight giant fins here! I'll poke around the site to see if there is already an explanation for why this particular rocket has such a huge fin area. or not. – uhoh Feb 18 '20 at 22:06
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    https://space.stackexchange.com/q/38188/6944 :) – Organic Marble Feb 18 '20 at 22:18
  • Ha! Good find! ;-) – uhoh Feb 18 '20 at 22:21
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    @uhoh probably design heritage of the contractor :) https://justamericanautomobiles.com/images/1961-Chrysler.jpg – Organic Marble Feb 18 '20 at 22:25
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    now that's what I'm talkin' about! – uhoh Feb 18 '20 at 22:26
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    They were deservedly proud of it https://assets.hemmings.com/blog/wp-content/uploads//2018/06/35546596_10216911160159239_6078489698735489024_o.jpg – Organic Marble Feb 18 '20 at 22:30
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    oh, now I understand the reference, I didn't really appreciate this connection until now – uhoh Feb 18 '20 at 22:44