Saturn V S-IVB

The S-IVB stage is the smallest of the three booster stages, just below the instrument unit and the spacecraft.

Construction notes:

30 july 2004: stringers are made from .3mm styrene, glued at one end first and then stretched in to shape. The "structure" on the fuel feed line is fishing line wrapped around the tube. When painted, it will be "highlighted" with at lighter metal colour to show the structure more clearly (well, at least I hope so...)

Notes - 5 October 2004: The thrust struture has been painted and the pictures show test fitting of the engine and thrust structure.

December 2004: The LH2 tank dome is made from balsa, sanded, filled, sanded and painted. It is put into the open front end of the stage and the internal ringframes and stiffeners are installed. They are all made from .5mm styrene which is a great material for this kind of parts. To make the ringframe fit, I made it slightly longer than is needed and just cut off the excess length after it is glued to the inside of the stage. Panels with electronics will be installed between rings number one and two. Also shown: work on one of the fuel/vent tubes.

All the panels in the forward skirt are installed and also the fuel/vent tubes. In the aft skirt: more panels. Thanks to David Weeks for providing me with info on these. The wiring on the thrust strucure is pretty confusing to get a hold on - the thrust structure is a really busy area!. I think I managed to pick out enough detail to give it the right appearance. The materails are styrene tubes and fishing line. Still missing are the J-2 engine and the (take a deep breath) auxiliary propulsion system module fairings (now breathe out...)

December 2006 After a looooong break have finally managed to get the single J2 for this stage completed! Compared to the F1 engines for the S-IC stage, it is a lot more complicated to build.

...and here's how it sits on the stage...:

June 2007. The auxiliary propusion systems have been built and, painted and installed. This completes the S-IVb stage