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
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
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