SimpleSailor,

The motor & gearbox are 12V 160RPM, double shaft, from ALIEXPRESS

ROGERA1

The drums are glued-up series of wooden rings, which are available at most craft stores. The big trick was picking the best size.

There are 6 servos and 5 winches and 2 battery systems (radio control & 12 Volt) in here. Where? this is the trial run on equipment placement

Alessandro, you like puzzles!

Alessandro,
Were you looking for these? Not yet installed, others not installed just placed there for show. If you squint very hard at each rib, in the preceding photo, you will see light reflecting off a tiny block on each of the ribs. Those are the supports for the beams

Alessandro,

You have addressed a problem that has stopped hull production here for a while. Given the intricate machinery going into this project I don't expect clear sailing (did he really say that?). I must be able to access the machinery space for changes, updates and repairs.
In the photo, the beam (in this instance #17) will be cut at the two lines and bolted to the 2 blocks beneath it (long silver screws). The decking supported by the beams will be plywood and planking, screwed to the beams (shorter black screws, second photo), and removable. If you see a flaw in this, point it out, please

Alessandro

You said that you would like to know how I am doing the volume calculation.This is just a screen shoot of the EXCEL sheet for one third of one eighth of the volume, yes approximately 4%. The INPUT columns are A ,B, C, & D. The rest are calculated fields. It is not difficult. Just tedious. MEASURE, ENTER, REPEAT. The difficult part is to put all this information into order. I know it will be around 1200 cubic inches or 18.6 litres, because of scale, because of the size of original BLUENOSE.
If it was computer designed this information would be a couple of minutes, but all I have is paper plans. so measure

My BLUENOSE transport vehicle The box is 8 feet long (2.4 metres) load capacity 680 kilograms. more on the volume discussion when I can think that much🙄

Alessandro has requested an explanation of my displacement calculations. This isn't the usual 'measure the area of the cross-sections and multiply by the length' I did that in high school, and it worked well. I want to try something different this time. This is not my tested and proven method yet. It is still being developed. If there are questions or disagreements, let me know. I will defend or change the method.

The hull design programmes, that are available, have long incorporated what I am attempting here, If the lines of the vessel are done on the computer, the volumes are easily calculated. I am working from old paper drawings. Question I ask here, are there techniques that will allow paper drawn curves to be transferred to computer hull design programmes? In that case, my method becomes obsolete quickly.

Until I find that key this is my method

So, visualize an imaginary box that the vessel will fit into, up to the waterline. Next, take that box and divide it into small CUBES. I have, for convenience, decided to work on a half-hull basis. Luckily, my half-hull happens to work out to 4 units high, by 4 units wide, by 28 units at the waterline. The unit = 2.5cm, from the plan or 5cm on the model. A cube is therefore 2.5 x 2.5 x 2.5 cm^3 for plan or 5cm x 5cm x 5cm^3 for the model.

There are 3 CLASSES of CUBES:

1 cubes outside of the hull lines. these have ZERO for measured hull volume, and are ignored.

2 cubes TOTALLY inside the hull lines are the standard 2.5 x 2.5 x 2.5 cm cube or 15.625 cc's for plan or 125 cc's for model

3 cubes that have hull lines that enter one side of a cube and exit another side of a cube.

Situation 1 and 2 are easy, either zero or 15.625. Like a light OFF or ON

Situation 3
I have decided to find the volume of the average point of entry to the cube to the average length of travel of the hull line through the cube, and the the average point of exit from the cube

My goal here is to find the CENTRE OF BUOYANCY.
By rearranging the adding together of the cubes I should be able to find the centre of buoyancy for the length. the centre of buoyancy for the height. the transverse centre of buoyancy is, of course, the centreline.

The accompanying exhibit shows the calculations for the first stern cross section. You will notice that many of the numbers are either zero (outside the hull) or 2.5 (inside the hull). The numbers between zero and 2.5 are measurements of lines crossing through the cubes

(to open EXCEL here there appears to be a DOWNLOAD MEDIA command in the top left corner)

Thank you Roy for your input

Yes, this is the basic technique I used 53 years ago, following instructions from SKENE'S ELEMENT OF YACHT DESIGN. I still have a copy by the bedside. (parts of it come with a warning. MAY CAUSE DROWSINESS, DO NOT OPERATE HEAVY EQUIPMENT AFTER PPROLONGED READING)

1 Measure area of 2 adjacent stations
2 Average
3 Multiply by length between stations
4 Repeat
5 Add all together
I used 10 stations in that equation
I am using 28 in this one

Using the EXCEL I have eliminated the repetitive multiplying and addition, so I increased the number of stations

Once I finish the EXCEL programme, it will be just inputting the data.

Roy,

The lines on your photos are lovely

The balance between CG & CB are my mortal fear. Along with that are the Centre of Effort & the Lateral Centre of Pressure.

I do have a distinct advantage of having statistics from the original vessel

Scale volume displacement is 18.6 litres or 1200 cubic inches
Scale weight is 18.7 kilos or 41 pounds
If keel ballast is 35-40% of displacement, the hull before ballast is 26 pounds. The current weigh-in for the boat is 24 pounds of parts and upcoming supplies, the finish, not yet calculated. Randomly, I am close. With the sail area decreasing by the square root and displacement decreasing by the cube root, yes, this will make a sail heavy boat. Eyeball estimate leaves a fin keel & bulb extension of about 8 inches for stability. If things are still a little crazy, i will be able to drop sail. Staysail, topsails, jib topsail. First tests will be with 4 sails up. I have seen BLUENOSE videos, with only 4 of her 8 up. It appears to be not uncommon. This is the reason for the long calculation for CENTRE OF BUOYANCY to calculate the CENTRE OF GRAVITY and the META-CENTRE.

I do race the little 65cm sailboats. The physical CENTRE OF GRAVITY of those is 9 cm's below the hull.