Close-up of various components near the heat exchanger:
- The large-diameter pipe in the lower-left of the photo is the no. 2 fuel
- At left-center is part of the turbine exhaust manifold.
- The heat exchanger occupies the center of the photo. The two
small-diameter lines near the bottom leading to the two left-most
connectors are the helium (bottom-most) and oxygen supply lines. The two
larger-diameter lines leading away from the upper connectors are the helium
and oxygen return lines (it's hard to tell for certain from this angle,
but it appears that upper-most line is the oxygen return and the one just
below/to the left is the helium return).