Monday fool

The class is finished a bit late today. All the rest of pieces of deck were glued and we coved the flange on the hull.

The transom is going to go onto this red frame. That pink strip of foam represents the temporary flange for vacuming. Vac tape will be put on it. Transom could have gone under the floor but it didn't. We cove on the temporary flange later on.

Lofting nails and screws are seen somewhere. When sanding the excess glue, be aware of this metal thins because if the powder of these remains on the foam it gets rust after all.

We could have made the flange cut at slit and fit those right away.

gone off rubberised epoxy. So hard.

fairing powder with epoxy.

Getting a fair line going with the long strip, we'd better using long board by hand instead of using band saw.

a nice jig coverd with peel ply on plastic tape on it. This goes on to the topside.

We have to make the other small bits of flange going on to the cockpit bulkhead attaching on the underside of cockpit side and topdeck which can be used as a mould for the flange. The reason they have to be made is that it gets load of people when the boat heels.

Chris explained us how the centre board works but it's pretty hard for me who have never sailed befor. Gantry will be stood up on each side of centre case anyway.

This is a sketch for explaining what the main sheet and boom bang are. If I was right, the main sheet is for fixing the across movement of boom and boom bang is for lengthway movement(mostly going up). Am I right?

dryfitting the flange jig

deck foam dry fitting. Transom hasn't been done yet. Looks pretty nice.

That small piece on the starboard side of transom represents where the rudder plate, which is 8mm plat of laminated fibre glass, goes on.

Make sure to get 50mm cover on each side and the laminate has to cover the floor which is not on hull at the moment. Coving is finished filling the small gap in the middle of collision bulkhead.

This shape has some curve so Lance peel the peel ply off and put the plastic tape on it.

We made a transom pattern again with the baked bean stick.

Put the masking tape or plastic tape on where the glue goes on.

Looks like EDB 400. This tape goes on the gap shown above on the collision bulkhead.

The last dryfittin.

Mixing glue which is fun time meaning the last job of the day.

Chris helped us coving. He put some glue on the corner and Lance follows him and coves.

Like this.

Glueing as well.

We have to glue on kind of overhead surface which is tricky a bit.

Laminating completed on collision bulkhead.

inside the prow

nice coving. Three layers of 300 EDB flange will be on this tomorrow.

Nice coving on transom as well as on the rudder plates made of foam which are temporary at the moment.

Make sure drive some lofting nails on the foam so it doens't pop up.

Chris told us about the prow tube and the foam above going onto the tube. I suppose I can't get a vision of them until they are set up.

Transom is a bit higher than it has to be but we can sand it down tomorrow.

Cool

Using a straight edge against the transom, support it against some weight such as a heavy workbench or things like that and push it. It is better to work to put the transom behind the deck rather than the transom under the deck.

optical illusion
halyard
bridge deck bulkhead
project manage

posh
stanchion(at quarter knee)

flange has to be slightly pushed againt underside of deck in order to squeese the glue to topside.

warm up

We've done cockpit, flange and transom today.

This is called planimetre which is for measuring area, a digital one above.

This is a mechanical one which has same purpose to the former one.

We can measure out the measurment by reading the gradation and the dial on it and have to use it clockwise.

It is a digital one which is more difficult to use it without the manual compared to the mechanical one.

It looks like this cost up to about 1000 thousand dollars.

A video of how to use it.

Chris told us about Simpson's rule and something regarding about measuring area, displacement, and centre of buoyancy. This is displacement curve. Draw a circle from the centre of gravity and divide it into 12 equal parts and did something but I still don't know what it is.

This is how to do the centre of figure. Cp curve is mentioned and I realised the meaning of the prismatic coefficient is the displacement compared to a certain prism.

It is ready to glue the flange onto the girder. Put masking tape along the side not to spread the glue everywhere.

Spiling plank for making cockpit side. Transferring the measurement of each frame is important and also the ones for each joint has to be done.

Draw the measurement on a sheet of  foam.

The jig of flange going on to the hull topside is completed.

The height of joint is a bit different but we cut them because they are still big enough anyway.

Using baked bean stick, Lance is making transom pattern for a jig of flange on it.

On going

a video of mixing rubberised epoxy

sticky as

The girder is coved with rubberised epoxy which is really expensive and is stickier than any other resin.

but we did neatly with using masking tape.

This is the cockpit bulkhead. When mixing the glue, figure out how much resin we need per the length of coving. We have to try not to waste them.

Clean as

This is left over rubberised epoxy. The resin is similar to manuka honey and the hardner looks like cream cheese.

A small extended piece goes in front of the centre case. Andrew built a temporary jig for standing it up.

fix it with using wedges

Transom flange jig made by using baked bean stick is set up on the hull. Transom goes exactly where the jig goes on and the flange will be done infront of jig. Transom made of foam will be laminated with deck. Every single overlap has to be sanded down as deep as the thickness of laminating(layers of fibreglass).

We used the left over rubberised epoxy on this prow tube becuase it is expensive. Fuller goes onto this and we need to bore a hole to squash this into. This tube is made of pre-preg carbon fibre and normal glue doesn't stick well onto this except rubberised epoxy.

prowtube packing

To make the joint better, sand the surface with 80 grid sandpaper.

Masking tape helps not to be sanded beyond where it has to be.

setting up the transom jig

a video of spreading epoxy on the prowtube

A small pieces went onto the cockpit. They help to reduce the angle between cockpit side and topdeck. Anyway, it has to be rounded every single edge.

joints on starboard stern deck

joints between cockpit side and bridgedeck bulkhead

the transom flange jig

cockpit side butt jointed

the prowtube

gantry tube made of black fibre glass for centrecase