Greetings all! I saw that the trucks tutorial get interested for many members so I decided to continue with the tutorial of making naval cannons (the way I do).
Today's topic is cannon carriages. Well, I found that making the carriages is time-consuming and becomes a burden in repetition, specifically if you have to make them for a three-decker.
But even for Alert, I am assembling, 12 cannons are quite enough to get bored with the redundant tasks. The problem, however, that all those cannons are in the upper deck and will be exposed to the viewer's eyes. They must be presentable and somewhat identical. This might not be necessary the way, your carriages should be built, but I like this method, and I would like to share it with you.
As mentioned above, the cartridges will be built for an Alert. There will be mostly photos as they are self-explanatory, but I will notate the process as it goes. Lets' begin. I choose Pearwood for brackets (sides), and now kinda in doubt whether the final color after oil will match the cherry hull to make a nice harmony. But I will deal with it later... 12 cannons are 24 brackets. Making 24 brackets individually - is a crazy idea and overkill. The solution was found to make a solid block with milled brackets steps, groves for both front and rear axletrees' and a grove for trunion. After the entire block ready, just slice for ready brackets. They will be pretty identical.
Part1, making the brackets
Brackets consist of two parts, they were cut on a table saw, and the top part blackened with HB pencil to create a nice separation line
Some of my earlier photos were lost, they were accidentally deleted (for good) without a recovery option. I will borrow some later images to show the current discussion. The below photo will show the blocks after gluing. Just look at the bottom one to get an idea of how it should look.
Both blocks: left and right were installed on the jig made specifically for this type of job. I use double-sided sticky tape, It is very thin and holds strong. Pay attention to the wooden block in the middle of the jig. This piece is really important when milling all the steps and groves as they have to be at a specific angle. This block was made by using the drawing from the AOTS book. First I downgrade the scale to 1:48, printed and cut it out.
The first task to mill the front and rear (hind) axletree groves. The rear grove 4.00mm wide and the front 2,5mm. This required straight flute mills (3.00 and 2.5mm)
The next task is to mill the middle of the brackets, For this job, I used round (ball) bur. Frankly, it doesn't design for use in the milling machine so it took a while until I get the acceptable result. You must remove a very tinny layer in one path to avoid wood-burning.
Once I satisfy with the results, I turned the blocks upside down using a new double-sided tape. Now, we will mill all brackets steps and the trunnion grove. For the steps milling, I used the same straight flute endmill (about 3.1mm), and for the trunnion grove the small 2,5mm round bur.
To check the proper angle and the trunnion grove I fit a cannon barrel and was quite happy with the test result.
Milled blocks from both sides should look like on the images below.
Now, we came to the rewarding part. Assuming that the milling job is done accurately, we will slice the blocks on the tablesaw to make actual brackets, and they should be identical!! Mission accomplished!
...and here you go!!!!
Well...this is the most difficult part and requires close attention and precision measurement. Remember, if you made a mistake, all the brackets will have this mistake. The rest of the tasks should be more fun.
Part 2, working with brackets
The next step is to make the holes for the bolts in both left and right brackets. Looks like a huge and time-consuming task making 144 holes. Here is comes another jig, just for this task. Here I use another set of blocks glued with the angle. Again the shape of the blocks determined by folding in the middle of the cut-out pattern used in Part 1.
I hope you get an idea why this angle is very important. Also, the wooden blocks are fixed with double sticky tape. I left the gap between the vertical side of the jig and those blocks. The size of the gap is the width of the bracket and will serve as a conductor when drilling holes for vertical bolts.
After some time drilling, you will have left and right brackets ready for assembly.
Alright, folks, we will continue with the assembly tomorrow. There will be more images and explanations... Please let me know if you have any questions and need to elaborate. Thank you!