thibaultron

That's what I did for the pattern on the plastic stem, the glue dissolved after a few minutes. Then I washed it with soapy water. For the wood bowsprit I sanded, it did not take much sanding, I used a very thin coat of white glue. I was worried that soaking it might cause it to warp. Thank you for the suggestion, though.

Part 12 Now on to the new bowsprit. I glued the pattern of the top of the sprit, and disk and hand sanded one side. Then repeated this for the other side. I then glued patterns to the other three sides. The side view pattern is shown below. I then shaped the top and bottom of the areas. Next the part was clamped in a small vise, and I beveled the first corner, using a new Xacto blade as a scraper. I watched both sides of the bowsprit to get it even. A little touchup with sandpaper and I was ready for the other corners. Here is the bowsprit beveled on all corners. The transitions from the square to octagonal sections are now even, and where they a suppose to be. The patterns were then sanded off, and using a piece of sandpaper held in my fingers I rounded the end of the part. Below are two pictures of the bowsprit placed on the boat. Here is a comparison photo of what the old bowsprit looked like when placed on the boat. That is just the tip of my finger shown in the photo. The model is small, and this is fiddly work. Next I printed out draft copies of the trailboard, and glued them to the hull. I glued them on in position, so that I could see if they fit, after all this, and so I can locate the position of the molding that goes above and below the trailboards. As you can see I still have a little shaping of the stem below the trailboards to do. I did not notice this until I saw this photo. The area where the stem turns to go down the front of the hull is not completely even. The divot on the bottom at the forward end is the paper of the starboard trailboard. I left the molding border on that one. It will probably be a couple weeks before the next installment. I have other, non ship building, commitments.

Frank Despite living in Baltimore for 14 years, I never saw a skipjack in person. Wish I had before I had to move. I hope you get to she her.

In the future I plan to scratch built the Carrie Price in 1/32, to match my Willie Bennett kit. 1/64th is small.

Part 11 I decided to shape the stem before puttying it. It would probably have cracked while I was shaping the piece. I glued a paper pattern to the stem, and let the white glue dry over night. I removed the bulk of the excess plastic with wire cutters, and sprue nippers. Then I cleaned it close to the bottom line with my disk sander. I used a metal block to raise the stem high enough for the hull to clear the table. Unfortunately I glued the pattern to the wrong side, and had to sand it on the side of the disk that cuts upward, and does not have the clearance notch in the shield. Live and learn. I staged this shot to show how I held the piece off the table. I actually had to sand on the other side of the disk. This made extra work, as I could not get in as tightly to the wheel as I could on the correct side. I also trimmed the front of the lower stem to match the pattern. The plans show it as being thinner front to back. After shaping this is what I had. The photo below shows where the old and new meet. The new portion is below the red line. As you can see most of the forward end is new plastic. Here is the first bowsprit placed in position to test the fit. It still sits a little high at the front, but I left a little stock on the stem for final fitting, once the final bowsprit is finished. Next tasks are to putty and sand this, and making the, hopefully, final bowsprit. I also have to figure out how I am going to built the, very tiny, trailboard moldings that go above and below the trailboard.

Part 10 As it turns out I also messed up my first bowsprit. After looking at it closer in sunlight, I noticed that I had not cut the bevels on the octagonal section evenly. One of the top bevels extended too far into the square base area. I used a black marker to highlight the flat top of the bowsprit. You can see that I cut the upper bevel in the picture too long. The bevels were also not completely even, but I could have lived with that, but these upper bevels end right where the rails tie into it, so that mistake would be quite visible. So I decided to start over. I shaped a new blank for the top and side profiles, Then I glued patterns to all four sides. When I cut I can see what is happening on both sides of the bevel. Once again I’ll scrape the bevels. I mentioned that the bowsprit was sitting at too high of an angle, so I decided to fix this problem before continuing. It is hard to see if the bowsprit is correct, if you can not get it into the proper position. I made a drawing of the stem, to use as a pattern. I also had to make some mods to the trailboard graphic, to get it to fit better. The main part of the graphic was good, but the eagle's head was too small. I rescaled the head, and rotated the graphic a little to line up with the molding, after correcting the eagle head. Here is the old trailboard. The trailboard is too high at the forward end, it should be supporting the bottom of the bowsprit. Also you can see that the eagle head in the drawing is larger than the one on the trailboard. This is the corrected drawing, with the stem outline. Notice that the trailboard now contacts the bottom of the bowsprit, and that the eagle head is a little larger. This is the stem outline drawing. I traced the outside of the upper trailboard molding to get the top of the stem. After placing a cutout of the stem pattern on the model, I found that the proper lines fell outside the bottom of the plastic at the forward end. Sorry no picture of this, I had both hands occupied with holding the model and pattern. I need to add to the bottom of the stem, to get the right lines. I cut out two pieces of plastic sheet, one .060” and one .040”. The stem is .090” thick on the model. Then laminated them together, and shaped it to fit the model stem. After cutting off part of one side, so that it did not extend so far down the straight part of the stem, I glued the extension in place. I’ll leave it overnight to make sure the glue has dried. The top of the new stem will be just below the old forward bottom edge. I have to putty and sand, putty and sand, etc. before I start to shape the part.

Part 08 After messing up the 2X size practice bowsprit, I decided not to make another practice piece. So I went on to sanding the blank for the model bowsprit. Here is the starboard side of the bowsprit tapered. Next I sanded the Port side. I rough sanded on the disk sander, then hand sanded down to the lines. I then glued a drawing of the bowsprit looking from the side (so I had the top and bottom profiles) to the tapered blank. Then I again rough and finished sanded to the lines. To carve the octagonal portion, I used a knife to scrape the 45 degree angled side. This gave me more control than trying to slice or sand this area. I held the bowsprit at a 45 degree angle and scraped with the blade parallel to the table. In this photo I have the blank just positioned using the knife, I’m not holding the other end, as I had to use my other hand for the camera. Lastly I sanded the round section at the forward end by spinning the bowsprit inside a piece of folded sandpaper held in my fingers. Here is the finished bowsprit temporarily placed in position. I’m sorry that the picture is not sharper, the part is small, and my camera is just your average type. If you look closely where the bow, deck, and bowsprit meet, the bowsprit is sitting well clear of the deck. This is not correct. The stem piece is too high at the forward end. I’ll have to reshape it. Next time I’ll reshape the stem, fix the divot in the port knighthead, and work on finishing the railings. The railings at the bow extend to attach to the bowsprit. That is why I had to make it before I could continue with the hull.

Thanks for the info on the snipping tool.

Print Screen, then paste into a graphics program.

Yes that is the way the sander is designed, in use the pins always stayed at the top of the slot. The slot was just so you could remove the table.

It never worked the way before. The distance between the table and disk is adjusted by sliding the shield back and forth in slotted mounting feet. The center of the circle formed by the angle adjusting bolts and the hinges, is the center of the hinge pins.

Work will resume at the beinging of the month. I've done the modification to the disk sander shield (see link below), and progressed far enough on my workshop remodeling, that I can remove the boxes and such from my work bench. I'm going to FL next week, and will start work back on the model the first of Aug. http://modelshipworld.com/index.php/topic/11014-modifications-to-a-dremel-beltdisk-sander/

While trying to sand the bowsprit blank for my skipjack model, I ran into a problem. The shield on the disk sander part of my Dremel Belt/Disk Sander projected past the edge of the disk, making it impossible to sand an inside corner, as shown at the left in the photo below. You can see that I was unable to sand up to the end of the piece. Also the mount for the table was not stable, it moved out of the angle setting under even moderate pressure. I decided to cut out part of the shield, so that I could get to those corners, and see why the table was moving. During disassembly I found that not only were the hinge pins split pins, that can compress under pressure, but also that the hinge hole in the shield was really a slot! The slot allows the table to be slid down and out once the clamp bolts are removed, not a feature I need. I’d rather have a nice tight fit on the hinges. So I modified the hinges by filling the slot, and drilling the hinge points for the next size 3/16” solid pins. I wish I could have filled the slots with metal, but I did not have any scrap that would not require massive amounts of filling to get small enough. The drilled holes for the pins would cut into the sides of the slots, so I feel that with the hardwood plugs I put in the mount will be strong enough. When assembling the parts, I used medium strength thread locker when iserting the pins. Any way here are pictures of the modified shield.

Here's an interesting site I found, on the history of the USS Arizona. https://www.warhistoryonline.com/war-articles/the-uss-arizona-life-and-death-of-an-ill-fated-battleship.html

Thanks!

Part 3 of 2D to 3D Deselect the original and select the new frame, at the crossing of the baselines (shown by the solid dot after selecting.) I have restored the 3D windows, and I’m getting ready to move the frame into position. With the “Move” command (see menus in picture). After you select “Move” the frame will be shown with black lines to show where it will move to, if you click the mouse. The original frame is shown still in place, until the “Move” operation is completed I then selected the crossing of the baseline, and station for this frame. I’ve been using the “Point – Intersect – 1” (or F4) to select all these crossing points. This completes the” Move” operation, The frame has been moved so that the point used to select it (the baseline crossing point), has been placed on the second point selected, the baselines station crossing. Here is the frame after I zoomed in a bit. And a bit more. Here I’ve removed the station line. The rest of the frames are moved in the same way. Note that in this earlier drawing, I had already drawn the keel line, and I am using that as the final move point, thus I did not have the baselines in these frame drawings. The way I show in this post is better. If you look you can see I have a problem, as the frame waterlines are not matching the reference waterline. This is from the original drawing I made from the scanned book page, before I bought the full sized drawing. After all the frames are in place you can remove the frame baselines. Before you do, look at the other views and make sure that none of the frames is out of position.

Part 2 of 2D to 3D This is the front view window expanded. We need to change the frames from the group we made earlier, so that we can move the individual ones. Select a point anywhere on the frames, and going back to the “Tools – Groups menu select “Break Group”. Now I have selected just the lines for one frame, and made them a group. Note that the solid dot is in the middle of the frame, this means that the group was selected by clicking somewhere inside the group boundaries. The frame is pointed in the “wrong” direction, I am placing all the frames on the starboard side to build the hull, and this one would end up on the port side. Deselect the frame group, and reselected it at the crossing of the baselines. Now I have to mirror the frame to reverse it. The above picture shows the menu selections to do this. As this is the front view I have to mirror it on the Z axis. I generally pick the wrong axis, and have to redo it until I pick the right one. I use the “Make A copy” option, that way I’m not risking the original, if I make a mistake. The black frame is the mirrored copy, that is displayed when you move your cursor off of the menu box. The mirrored frame will move with the cursor, until you click the mouse, then it will be dropped on the drawing where the mouse was. There is the mirrored frame. If the original was a group the mirrored one will also be a (separate) group.

Going from the 2D drawing to a 3D drawing. This will be in at least 2 parts, as I have too many drawings to fitt in one post. Above is the drawing I’m going to start from. I have developed the frames on the upper right to individual frames, on another layer, as part of this drawing. Here is the layer with the frames. I have selected them all, and am making them a group, using the menu selection shown. Making them a group makes them basically one thing/entity. The CAD program will act on all of the grouped lines as a single thing, not separate lines. I’ve now gone to the 3D mode, by selecting the 3D button in the menu system. Note that the lines are still in the proper relationship, as shown in the upper left window. The lines look skewed in the main window, because we are looking down and a little to the side. Note the 3D viewing angle settings in the lower right bottom main menu. If all the settings are at zero, the drawing is displayed as if it was a 2D drawing. You have to crank in some values so that you can see the 3D view. The baselines, fore and aft parallels, and the station lines have been drawn, along the XY plain (Z=0). The red lines are the baseline, and parallels. The green lines are the waterline, and station lines. These are actually the ones from the 2D drawing, I’ve just turned on those layers. All the 2D lines you drew will be displayed on the XY plain in 3D. Placing different sections of the drawing on different layers allows you to hide those layers when working on another section. For example the station lines and baselines are on different layers. I hid them when I was working on the spars, to cut down on the clutter on the screen. Once again you can see that they are not skewed in the Top, Side, and Front views. In this picture I’ve turned on the layer with the completed frames. The curve lines are the deck, with the camber. Here the frames are all selected, and made a group. I have also made the baseline, etc. a separate group. I cleared the selection, and reselected the frame group, at one of the intersections of the baselines. The selected point is the solid dot. The square boxes are the individual line end points. There is an option in the “Options” menu “Point Select Mode” that turns this on and off, if you don’t want it. I forgot to save the screen when I was rotating the frames, so the above drawing is the main one. I selected some lines, and am getting ready to rotated them. This picture is to show how to get to the rotate command. When you select rotate this new menu window pops up. We want to rotate the frames to be perpendicular to the baseline, so select rotate around Y axis, enter 90 deg. For the rotation angle, and deselect the “Drag Mode” option. Now when you move your cursor away from the box, it will be displayed as a curved line and arrow symbol. Move the symbol to the main windows, and click. I could not get the screen capture to show this symbol. The frames have been rotated, and the frame group is being broken, so that we can work on the individual frames.

Nice looking boat and kit. Looking forward to your build. Is there any history on the boat? Country, year, use? Are the instructions in Russian, English, both, or other?

I posted the drawings in a previous post, refer back to them for this post. I draw the keel and/or fore and aft baseline in the XY, marking the station lines along this line going from the baseline up in the Y direction. Then I paste in the frames/hull stations, which will be shown laid out in the XY (facing you). I rotate each frame around the Y axis, so that it is now in the XZ plane, perpendicular to the keel/baseline. Then move each frame to its corasponding location. I'll post a step by step tomarrow, its 10:20 PM now.

In DesignCAD You can try Control-Shift-R. This will refresh all the screens, not just the one you are on. Or Control -Shift-W, this will resize the drawing in all the windows to fit the entire drawing in them. If you lost one of the 3D window panes, the menu option "Windows", "DesignCAD Tile Settings", "Restore DesignCAD Tile" will restore the screen to the 4 windows of the standard 3D setup.

In an earlier post someone mentioned that their CA was not bonding parts. I had this problem with a bottle of CA. It would go on the surface, but when you pressed the parts together, nothing, even though the glue was "wet" when the parts were pressed together, and "dry when I released the parts.. I bought another bottle and it worked fine. There was something wrong with that first bottle. In 25 years of using CA, this was the first time it had failed to bond. I have never had the CA let go of a glued model, but I have found it to become brittle after time, and fail after a hit on the model sometimes. This was on RC ships that take a beating, and have less ribs than would be typical of a regular RC hull.

The key for us is the use of the word "spline", and the picture of the draftsman using a batten to find or draw the lines. In CAD most programs can draw a curved line along a series of points that don't fall along a straight line. You could use this to draw an osilating line as in the video. This does all that math for you. In DesignCAD they are drawn using the "Draw Lines Curved" command. In AutoCAD "Draw Spline". DesignCAD also has a curve, called a "Bezier curve, but that involves tangents, and I have never used it. This is the type of line I use to trace a sheer, or a frame line. In DesignCAD you can even specify a file with a list of points along the curve, and it will draw the curved line for you. If you have an offset table, these points can be generated from the table. The kicker is that the points in the file must start at one end, and finish at the other. This means determining the flow of the points in the offset table. I generally use a spreadsheet, to manipulate the offset points, into an end to end flow.

THe dedge winch drawing in an earlier post, is also a cleaned up 2D projection.

The 3D hull in the above drawing, is not solid, I used surfaces between the frames to give the look of solid, so I could see what she looked like. DesignCAD does not extrude a solid thing. It just make tall 2D walls, with no top or bottom surface, so I can't for example extrude a keel outline to 1/8" thick, and then operate on it like it was a regular 3D thing. The solid drawing shapes like a box or cylinder work just fine with solid add, subtract, and the other operators, but not extruded objects. That is the point I am at now with my new drawing of the boat above. I have to relearn AutoCAD (which I have an old copy of), in order to extrude a solid keel and frames. Then I'll import them into DesignCAD to continue. Why not just use the AutoCAD? It's an old copy, and I expect every new version of Windows to not run it, so far they have, but I'm familiar with DesignCAD, and can afford to upgrade it now and then, I'll never be able to afford a new copy of AutoCAD. DesignCAD is almost as good, just not in the Extrude operation. To illustrate this I have two drawings. The first is a random 2D polygon I generated, then extruded, with a box I made using the Solids menu. The box is of course, on the left, the polygon on the right. The second drawing is the above with using the "Hidden Line Removal" command. The box came out correct, but not the extruded shape. I can save a 2D projection, and remove the extra lines, and have, but I can't just do it automatically. Here are examples of that: The 3D drawing with hidden lines removed. The inner bands are 3D solids – Tubes, the outer band is an extruded shape, notice that the walls of the inner bands were not hidden, as the extrusion has no top surface. The end piece is generated from adding and subtracting solids, and also came out correct. This is the 2D projection drawing, as it was generated. Here it is after I cleaned it up by hand.