Monday, 8 October 2018

Beams & Knees

Shamrock's conservation work has been progressing well over the past few weeks with the following oak items cut fashioned and fitted.
  • Forward cargo hatch coaming main beam.
  • Extra forward beam. While not only providing extra strength this will also allow Shamrock's deck winch to be bolted through the deck and a beam at both ends. It was originally bolted through the deck and beam at one end with the other end through the deck and a loose reinforcing plank beneath.
  • One aft beam. 
  • Aft deck shelf.
  • Aft deck shelf extended around warping horse and deadwood. This will prevent the deck moving around the deadwood and warping horse uprights helping to maintain a watertight seal.
  • Transom knees.
  • Aft beam knees.
A total of four beams ended up being cut from the naturally curved oak tree originally acquired for the main beam.

New aft beam.
New forward beams.
Aft deck shelf and extension.
New knees.

Monday, 17 September 2018

Two In One Out

With the two new beams bolted firmly in place, and using two heavy duty cargo straps to hold Shamrock's sides in place, the forward cargo hold coaming and the main beam beneath it have been removed. The two cargo straps, one forward and one aft of the main beam, are fitted across Shamrock and secured around a frame and the beamshelf at both ends. A large plank of oak from a tree with a natural curve has been sourced and the new main beam has been cut from it. There is enough oak left over to cut out a second beam that is earmarked for the next beam forward of the main beam.

New forward beam fitted.
Removing the main beam.
Aft securing strap.
Well secured.
Marking out the main beam.

Monday, 10 September 2018

New Beams

The shaping, steaming and temporary clamping into place of the last section of starboard beamshelf has enabled the cutting and temporary fitting of Shamrock's aftermost deck beam. To get the correct deck camber a plywood template has been produced taking the curve from her cargo hatch after beam. Two partner beams have also been cut with tenons at one end that are to be mortised into the new beam while the other ends are to be bolted to the new deadwood adding extra rigidity to Shamrock's stern. Sections for her after deck shelf have been temporarily fitted to the transom and one of the forward beams that needs replacing has been cut and shaped ready for fitting. These new sections will need to be removed and given a protective coating before they are finally bolted in place.

Last section of beamshelf
Josh beam shaping.
New aft beam in position.
Partner beams.
Deck shelf.
New forward beam.

Friday, 31 August 2018

Warping Horse

With the new warping horse in place followers of Shamrock may notice the new top beam has a pronounced curve when compared with one fitted in the late 1970’s restoration. This is intentional. Details of this form, for the warping horse, were found amongst a collection of old photos of Shamrock operating in and around Falmouth. Amongst these there is one photo of her under motor/sail, taken from astern, showing her original warping horse complete with curve. Shamrock's top gudgeon has been fitted and checked for alignment. The rotten rear port section of beamshelf has been removed and a replacement is being fashioned. Thanks to Richard Trebilcock for the historic photos.

New warping horse.
Shamrock off Falmouth
Top gudgeon.
Checking alignment.

Monday, 20 August 2018

Sternpost

Six inch (15 cm) high draught figures, spaced 1ft (30 cm) apart from the underside of the keel have been carved in Shamrock's new sternpost. This is now bolted in place and the bottom two rudder gudgeons have been fitted. The top gudgeon has had an extra steel strap welded on its inside edge ensuring that once fitted the ruder pintle drops freely through all three gudgeon eyes. Oak for the new warping horse has been cut to size, using the old warping horse as a template, with shallow groves being cut on the inboard face of the new transom ready to receive the uprights. Lengths of galvanised treaded bar with a nut welded on one end have been used for the through bolting of the transom planks. Through bolting is achieved by drilling through the section to be attached with a drill the same diameter as the bar and then counter sink ensuring the nut will not be proud and there is sufficient space for a socket. The receiving plank is drilled undersize, once the plank butts have received a layer of black butter, an impact gun is used to screw the bar into the receiving plank.
New and old sternpost.
Sternpost fitted.
Botton gudgeons.
Ready for the uprights.
New warping horse timbers.
Old warping horse.

Sunday, 5 August 2018

Taking Shape.

Two new slabs of oak have been shaped, bolted and through bolted onto Shamrock's transom giving her more structural strength as well as restoring her distinct shape. All that remains to complete the transom is to trim the ends to profile then fit the sternpost and fashion piece (wash strake). With Cotehele rangers assistance the main tabernacle has been lifted out of Shamrock and moved boat shed where the crew has started the thrilling task of scraping all the old paint off.



Through bolt.



Wednesday, 25 July 2018

July Update









Shamrock's aft deckhouse coaming has been removed allowing its supporting beams and the mizzen tabernacle to be inspected. The good news is that the beams and tabernacle are sound, and it was already known that the coaming needed to be renewed. The new aft 'deadwood' has been black buttered and bolted into place and the new transom board is in the process of being fitted. The timber for the decking, hatch coaming, knees, etc. has been delivered and drying out nicely under the cover of a tarpaulin, while the large Oak timber required for her new main beam is still being sourced.

Deckhouse coming.
Exposed beams.
Ready for fitting.
Old and new bolts.
Deadwood fitted.
More wood.