- Review of this week (our work on Monday, Tuesday and Wednesday)
- Looking forward to Week 2
- Team name
Review of this week
Monday
we started to do some adjustment of the bench in the morning. There were two major issues we have for the bench: the first is that the bench is not long enough. As Vaughn told us that the bench should be at least as the same length of the dory.Given consideration of the space we have in the workshop (Team A just next to us), we decided to extend our bench on both sides.
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| Extending the bench |
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| Extending the bench |
The second is about the level.As one side of the bench is slightly lower than the other side, we need to find a way to solve this.A level is used to check the bench.We also planed the bench.
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| Checking the level |
After the setup of the bench, we used a string to mark the centerline. Just make sure that the string is tight enough and is straight from one end to another.
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| Marking centerline |
Marking stations comes next.One thing needs to be noticed is that we should have 40mm at the forward for the thickness of the stem. So station 0 is actually marked 40mm behind the edge of the bench.
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| Marking stations |
After finishing the bench, we started to work on temporary frames.But we made a error here. We did not cut the first board according to the plan. We just cut it into three parts with the same size. Then we realized that as the temporary frames are in different size, we might have problems on some of them.Luckily, after calculation and planning for the cutting, we found that we can still get all frames. The lesson is, before cutting, do the calculation and cut it according to the plan.
Next thing is to drawing the frame on the board as preparation for the cutting. This is similar to lofting.
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| Tian is drawing the frame |
Tuesday
On Tuesday, our first task is to continue the frames.In order to cut the frame as accurate as enough. We first used the bandsaw, then used the sander. We also tried to sand the edge of frame to correct minor errors by hand. Just as Chris told us, keep the lines. If you can lost the line, then you lost the reference (but unfortunately,we found out that one or two frames lost their lines, and this error made them 1mm shorter than they should be) .After finish all of them, we need to set them up on the bench.But before we do this, 'ribs' are added to the bench on each station. Here comes one question: which side of the station should we put these 'ribs'? This is little bit confusion. We asked Vaughn for help and guess what, we got a perfect answer: you need to consider the curve of the hull.Because the frames are supposed to support the hull during the construction process, we need to bevel the frames' edge. So if you put the frames on the wrong side of the station, you can not make it. So, for statoin 0,1,2,3 (actually as station 3 is the midship station, it's frame side does not really matter), we put the frame in front of the station lines, for station 4,5,we put frames after the station lines.
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| Continue working on frames |
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| Cutting frames on bandsaw |
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| Sanding to make the frame accurate |
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| Vaughn explaining frame positioning |
Setting up frames on the bench is a challenging task. As the bench itself is not leveled , we need to use widget to level the frame. Use the level to check the level, then make the appropriate widget, and put the frame on the widget. This is the first step. Then,we must make sure that the center line of the frame is aligned with the center line of the boat (which is marked by a string on the bench).The third step is to drill the frame to the rib, and then using 'support arms' to hold the frame tight. Make sure the frame is perpendicular to the bench.
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| setting up the frame |
Talking about the cutting plan, I think it is one of the highlights for Wednesday. We need 9 pieces of yellow cedar pattern to make the stem.But actually at the beginning we did not have necessary clues to cut the wood we have. At first, we just take some spare wood from Team A (as they are working on Chris' boat, Chris provided them additional wood for the stem, so actually they did not cut them from their yellow cedar) for stem. However, Chris came to us and stopped us using these woods. Then he showed us how to make the cutting plan for the yellow cedar: which means how to get the most from the wood you have. A good start would be lists of main parts and cut offs. And he also suggested that AutoCAD is a good tool for cutting plan.
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| Discussing cutting plan |
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| Hints for cutting plan |
We cut off segment of the yellow cedar for the stem before we made the cutting plan, despite Chris told us to ask him before we start to cut.Luckily this does not cause much waste. Chris said that one of the yellow cedar may be enough for the whole boat. And my cutting plan shows that one is enough.Obviously Chris had the idea that students may make mistakes and they surely need more woods in his mind when he ordered those wood.(to add picture of our cutting plan)
We used the segment we already got for the stem (actually this was exactly what it was cut for). We need 8 batten with 5 mm thickness to make it 40 mm thick and another one for the out surface. Bandsaw is used for cutting. And then this 9 batten are put into the steam to make them soft. This took about 30 minutes.We also printed out full size (1:1) drawing for the stem and fix it on a board.
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| The stem |
We will continue our work on the frame. There are some errors we need to fix for the frame. And we also need to bevel edges of frames according to the curvature of the hull. Have not got any clue on how to do this.
The second is to finish the stem, glue those 9 battens together.
The next thing is to finish the laminated midship section.
And finally we are going to cut yellow cedar following the cutting plan to start to make parts.
Team Name
We decided to name our team Team Morris after the name of the owner of the dory, John Morris.
Unitec with Cris Lovegrove!
ReplyDeleteI'm a fromer 2006/07 student.
Regards to Cris.
João Rivera