posted 03-28-2016 10:12 AM
   
Recently, I acquired a 1:10 scale model of a Saturn V S-IVB and I need help in working on its restoration. While I am not planning to bring it back to a "new" state there are a number areas I want to refurbish, one of which is the Auxiliary Propulsion System (APS) on the side of the SIV-B in two places.  My research has shown me there are two types of APS, one for the Saturn IB and a different on for the Saturn V. It is the Saturn V type I am looking at. In the picture of the model shown below the inside of the APS is shown. I have the LH2 tank and have made the O2 and Helium tanks.  
Also note that the opposite APS does not show the detail as this one does. I think it was a white plastic part and this side had a clear cover over it showing the internals. The issue is the engines and location of those engines on the model as it compares to the actual APS as flown. It appears that the model has what I call the "small" engine higher up on the center line and there is a "large" engine in the base as well. The schematic and pictures show that engine to be lower on the APS. Also I can not see a large engine in the base of any of the photos.  
Can anyone help with any more info on the APS? Was there an earlier configuration that was later changed before it was flown? Any help on this would be great. I have photos of both the Saturn V models of this size at Kennedy Space Center and the U.S. Space & Rocket Center and neither have the same detail of the APS. | 
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