Launched in 1854, the USS Constellation was the last sailing man of war designed and built by the US Navy. Unlike the more well known USS Constitution, the Constellation has not been extensively rebuilt over its history; consequently, a far higher percentage of its wooden structure of the vessel is the original, irreplaceable fabric. The wooden hanging knees show original adze marks made during their shaping -- clearly from their form they were once massive, live oak trees.
Prior to its drydocking, the vessel was in very bad condition
and in danger of total loss from either through sinking,
structural failure or simply through decay. The immediate goals
of the hull repair were to restore the vessel's hull strength
while retaining as much historic structure as possible. The
repaired hull will be the foundation of the complete restoration
of the vessel an operational vessel during the US Civil War.
Digitizing the new sheer line
These 3D polylines can be used to: document the shape of the hull, record distortions, or to map the hull for additons or repairs. We used them as the basis for a complex surface model of the hull:
Multisurf hull model of USS Constellation
The surface model then is used to make the lines plan and to accurately generate the shape of new structure such as the replacement topside frames.
Frames waiting for installation
Replacement topside frames
USS Constellation is back at its home berth