Unknown Saturn Launcher by McDonnell Douglas

[Michel Van]

on Boeing Space Twitter Account publish some picture about McDonnell Douglas Space Station
https://twitter.com/BoeingSpace/status/1074717198671740930


one of picture show this Saturn deviate
it's feature eight solids on thrust structure
got someone more information on this version ? 

[Generic Username]

It's an upper stage for a Space Shuttle: it would sit on the back of a manned flyback booster in place of the orbiter. This was in the early days of the program when the Shuttle was to have two manned stages. By putting the solids off to the sides, rather than evenly spaced around, the stage would fit comfortably alongside the booster.

[Generic Username]

Here we go, from a McD report from 1971. Poseidon SLBM motors don't often show up in proposals for NASA boosters.

[Michel Van]

Thanks for Info and Picture

the only other proposal for Poseidon SLBM for Rocket,
i know, was a Titan I with Poseidon as Upper stages around 1957

[JoeFromRIUSA]

Polaris, Michel, not Poseidon for the Titan 1 upper stage in 1957

[Michel Van]

Polaris, Michel, not Poseidon for the Titan 1 upper stage in 1957

dam your right, confused Polaris with Poseidon...

[mike robel]

Interesting concept for a Saturn V.  Looks like its an S-IVB version for a Saturn V given the helium storage tanks.