HMS Granado Cross Section by thibaultron - CAF Models - 1/48th - First POF Model

[thibaultron]

My scanner seems to be fine. It measures correctly. Thanks.

[thibaultron]

Part 012

 

I added weights while the glue on the last chocks was drying.

 

 

Here is the frame with all the pieces glued together.

 

 

 

 

The last steps are to trim the chocks flush with the neighboring timbers. As you go up the frame the timbers get smaller as less strength is needed to support the hull. A chock starts out the same thickness as the larger timber, and the end attached to the thinner timber needs to be trimmed to match. I used a combination of a modeling knife to whittle down the bulk of the area, and Rifflers/Modeling/Needle files to remove the rest. Finally I use 400 grit Wet/Dry sandpaper run along the grain of the wood to remove tooling marks.

All these files come in various rough to smooth cutting teeth types. The Rifflers files are used for fine metal finishing, in tight spaces, and are very expensive. The Needle/Modeling files are much cheaper, but generally don’t list the aggressiveness of the cutting teeth. I buy a few different sets from different manufacturers of these files, which hopefully will come with smother and rougher cuts, giving a selection to use in my modeling.  The ones I show below, are a from a very cheap set, but have the right cutting teeth for this job.

 

First I use the knife to cut a Stop Cut across the grain, along the line of the finished edge. The Stop Cut helps prevent the wood splitting past the area you are removing, as you whittle along the grain to shear off the unwanted portion,

 

 

 

The knife may not cut all the way to the bottom the first time, so  press it down several times, and check as you cut, to see if you need to deepen it more. I didn’t want to risk marring the finished surface by using a saw for the cut. On larger pieces a saw may be required.

 

 

 

 

 

 

Then I slowly split off the unwanted area in thin sections.

 

 

 

Note, in the picture below that there is an extraneous laser etched line on the tip of one of the frame timbers. I’ll just have to live with this.

 

 

The files I use to finish the cut are: a 3 sided triangular file, a file with one side flat, and the other slightly rounded (humped), and a flat Safety File (file on the right below). The Safety File has one of the long edges flat with no teeth. This allows you to file an area without cutting into the adjacent finished edge.

 

 

Here is a diagram from the Nicholson “Guide to Files and filing” of a Safe Edge.

 

Finished cut before sanding.

 

 

Finished Frame 7. Note, that I will sand the taper on the inner and outer frame surfaces once I finish all the frames, and can set them up in the Frame Box. I don’t trust my skills at this point to pre-taper them individually.

 

Next time I will start Frame 8

[EricWilliamMarshall]

I’m just catching up; this looks great and I love the detailed log! Rock on!

[thibaultron]

Part 013

 

There is an error in the instructions for Frame 8. As detailed in the review of this kit by James H. The instructions do not show the part numbers for the shims that need to be attached to the plans before you start to assemble the frame over it. The picture below shows the part numbers.

 

 

After mounting the scan of the frame drawing, on the build board, I enlarged the slots in the upper frame piece to mate with the resin spacers inserts, that will used later.

 

 

 

Frame 8 is where the upper and lower frame halves start to have a significant offset, vertically, from one another along the bottom edge of the frames. They still match at the false keel notch. If you look at the false keel, you will see it is also getting taller as we progress further.

 

I progressed as in the previous frame by gluing the lower frame pieces together at the mating edges, and installing the chocks later.

 

 

Using another copy of the frame for reference, I glued the bottom section of the upper frame to the lower frame half, orienting the tips so that they were equally space “Up’ from the lower edge of the bottom of the lower half.

 

After this had set, I placed the rest of the frame pieces in place, along with the resin inserts, so that I could get a feel for how they would fit in place.

 

This is where I ran into a problem. The resin insert on the left hand side, was a little too large! It was too long and I could not get the upper top frame to mate with the neighboring piece, without bringing the outside edges much further in,  from the outside edge of the lower half, than those on the right hand side! It also seemed too thick and caused the tip to not mate with the lower frame, at the top (the bottom too, but more on that problem later). I tried sanding it, but finally gave up, and used a square block held against the lines on the drawing to position it.

 

 

Once satisfied, I glued the other pieces in place.

 

 

Here I found a mistake I had made. When assembling the lower half of the frame I somehow got the vertical spacing between the shim area and the unshimed sections wrong. And there was a gap between the upper and lower frame halves, where the drawing showed them touching.

 

 

I once again used Isopropyl Alcohol to soften the glue joints in this area, and took them apart. In the end I had to use an additional cardstock shim, on top of the supplied shim to get the correct spacing. The lower frame top piece may have been cut a little thinner, causing the gap. I didn’t go back and compare it to the opposite piece to be sure, I was satisfied that they now mated correctly.

 

 

The above picture seems to show the top pieces out of alignment on the right side, but this just an illusion due to the camera angle.

 

With that fixed I moved on to installing the upper half chocks.

 

 

 

 

After these dried, I went back and cut the chocks to match the varying surface levels, as detailed in the previous posts.

 

 

Yes, the frame drawing has mysteriously suddenly morphed into the one for Frame 9! I changed to the next frame before I took this picture. The camera was in the house, when I was cutting the chocks.

[HardeeHarHar]

Thanks for taking the time to provide such detail.  Having the kit on the shelf, I will have to reference your build log if I am to have even a chance with this planned future endeavor.

[Jim Rogers]

On 4/23/2021 at 5:02 PM, thibaultron said:

Part 004

 

 

 

Got a little accomplished today. I took the weights off the frame sheet, and the shims had glued down nicely.

 

 

 

 

 

 

To prevent the frame pieces from sticking to the shims and frame sheet, I was going to used wax paper, but decided that it was both too thick, and opaque, for the job. Instead I used Scotch tape.

 

 

 

 

 

 

First I put a long piece the length  of each shim, then cut carefully around the bottom of the shims, pushing the tape end down onto the paper, covering the area that the chucks will sit down on. Then I covered the rest of the bottom of the frame area, leaving a good length sticking up on the ends. I then cut across where the bottom tape crossed over the pieces left from covering the shims. Then, I pulled the cut ends off, leaving only  a short area where the taped was double thickness.

 

 

I noticed that the sheet was not completely flat near the top, so I placed a weight across that area.

 

 

 

 

 

 

The parts numbering was a bit confusing, at first, until I examined the parts sheets.

 

 

 

 

 

 

5F-6B4- For instance translates as, Parts Sheet 5F part 6B-4, as shown in the parts diagrams in the book. This picture also shows one of the reasons I scanned the instructions. As I find and remove the parts, I highlight them. As I progress, this will make finding the parts easier, by process of elimination. It will also, hopefully prevent me from ending up with parts left over, when I finish!

 

 

 

 

 

I still have to cut out the rounded areas left when the parts were CNC routed, so I’ve only cut out the three parts highlighted.

 

 

 

 

 

 

I have to figure out how to mount my lighted magnifier lamp “eyes” to the new work bench, as I had to leave off the built in vise at the right hand end, now that the spray booth sits there. The workbench top is too thick, to mount the factory “C” clamp.

 

 

I’m using a second compartmented box, like the one I put the small parts in , to store the frame pieces, while I’m assembling them, or when I finish for the day.

 

 

After some consideration I decided that I needed to be able to pin the frame sections in place while the glue dries, so I need to move the frame drawing from the glass plate to a wood base.

 

I did not have any wood that was flat enough for my satisfaction, so I needed to buy another piece. The best type of wood to insure flatness, is butcher block types. I went to Home Depot, and found a 17.5”X 1” thick disk butcher block piece. Even then most of them were far from flat. I went through them and only found three of a dozen or so, that were close to flat. I selected the one that was the flattest, and bought that one. It is still a little bowed, but very close to dead flat, and close enough for this application.

 

 

 

 

 

 

So I transferred the frame drawing from the glass to the disk.

 

 

 

 

 

 

I also bought a short MDF shelf, that I will cut into sections, and glue sandpaper to. This will give me nice flat surfaces to sand “stuff” on.

 

 

I received my kit yesterday. Where are these rib drawings located? All I have is the assembly instructions and parts list/drawings.

[thibaultron]

There should have been a roll of plans showing each assembled frame in scale. I scanned each frame and used the prints of each as a pattern when assembling them.

[Jim Rogers]

10 hours ago, thibaultron said:

There should have been a roll of plans showing each assembled frame in scale. I scanned each frame and used the prints of each as a pattern when assembling them.

Thanks Ron, I didn’t even look at the rolled up paper, thought it was protection for wood strips I wouldn’t need until later. Are you any further along? I can’t find any log entries on any bodies build log past 2021.

Edited July 11, 2023 by Jim Rogers

[thibaultron]

Due to family obligations, I have not gotten any further in my modeling. Physical projects at least, I have been doing a few CADing projects.