Restoration activity on the CREST over the last 6 weeks has included
A significant event – the first replacement stringer now in place.
A brief description of the steps …
This stringer is one of 2 full-length 8.4metre 65 x 28 stringers on the starboard side, it required roving at each of the 40 ribs (frames) and the scarfing of 2 sections:-
The first section (at the bow) is held in place while holes, drilled from the outside, go through the plank, the rib and the timber of the new stringer.
Then a 2.5inch long copper nail is tapped through.
Photo below shows rove, a square-shanked copper nail and the ss rove-punch.
The rove-punch is used to tap the rove down the shaft of the nail until the rove is gripping the stringer’s surface.
The protruding nail shaft is then cut-off,
before the small-roundhead hammer, using rapid tapping, is used to shape the cut-nail shaft around the top of the rove.
At the plank’s outside surface, a nailhead sized counterweight applies pressure while the rapid tapping happens.
For the aft length of the replacement stringer, epoxy glue is applied to the .5metre long scarfing (overlap) section,
before this second length goes through the holding, drilling, nailing and roving process.
Photos below show the new stringer – viewed looking to the bow and to the stern.
The system relief-valve has been refurbished and installed …
… as have the tappet rockers and …
… the exhaust manifold.
Refurbished oil strainer in-situ in sump.