To prevent issues with a hot tunnel, we insulated the forward part of the tunnel with fiberfrax and titanium foil - much like the firewall, except on the inside. This does mean that we're not protected from an engine fire opening a hole in the skin, but during normal operation this should keep the tunnel cool.
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| Titanium foil + fiberfrax protection for the forward tunnel |
We then tightened the fuel hoses to the valve and firewall, in the right position for the fuel pump to be dropped in, while avoiding the heat tee servo:
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| Fuel hoses attached to firewall fittings |
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| Fuel hoses attached to fuel valve |
It was then time to attach the fuel pump, and secure the fuel return hose to it:
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| Fuel pump installed in place |
This concludes section 37.
Total fuel system rivets: 30
Total fuel system time: 16.0h
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