F-1 Engine (Building 4205)

As we drove up to a tour stop (used to house a plywood and PVC pipe full-scale mockup of the Ares I frustum, interstage, and aft end of the second stage; it's used to verify that the components can be serviced in the VAB or on the pad), I noticed a fairly nice-looking F-1 and nozzle extension. After the tour guide was done giving his presentation, I excused myself and shot the F-1.

This is apparently Building 4205 (according to the itinerary we received; the southwest corner of the building also has a "4205" sign, although the southeast corner had a "4211" sign), also known as the Propulsion Development and Research Lab (according to the tour guide).

The F-1 is approximately equidistant from the building and the nozzle extension, so I was unable to get any full side shots of the engine.

This is F-1 engine serial number F-4023; the nozzle extension is from F-5034. Alan Lawrie tells me that F-4023 was originally installed on Apollo 8 (S-IC-3) and underwent static firing with that stage. The stage was delivered to KSC for launch but the engine failed a later test and was removed in May 1968.

The nozzle extension displayed with this engine is from F-5034. This engine was the spare engine assigned to S-IC-5 (from Apollo 10). F-5036, originally installed in the stage, was removed and F-5034 was installed in its place; F-5034 ultimately went on to power the Apollo 10 mission. During the swap-out, the crew apparently retained F-5036's nozzle extension and installed it on F-5034, leaving F-5034's extension behind for us to enjoy today.