Jump to content

SS Nomadic, Titanic's Little Sister - 1/200 - 3D (Design)


Iceman 29

Recommended Posts

Tks all.

 

Fusion 360 from Autocad.

 

These brand new resin printers bring us closer to our designs, we are much less frustrated with the result of the printing compared to the "old" models. I can't wait to see what the next developments in low coast 3D resin printing are going to be. It's exciting!

I will try to reduce the size of the control wheels, the circle is 0.35 mm thick and the spokes are 0.3. This part is a bit oversized because of the limits I had set for a first test.

  • Like 1
Link to comment
Share on other sites

I finished the windlass, it was an exciting design to do, but quite long, this type of steam windlass is quite complex and compact. Unfortunately I don't have all the technical informations, especially on some anchor chain sprocket dog clutch controls. 

 

I will now get down to the printing of the small parts, and the front part of the hull which is also now finished.

 

Screenshot-2020-11-25-16-50-26-555.jpg

 

Screenshot-2020-11-25-20-08-28-333.jpg

Screenshot-2020-11-25-20-51-25-406.jpg

 

Screenshot-2020-11-25-21-27-53-654.jpg

 

There's something written on this fly wheel, I couldn't figure out what, so I winked at the construction shipyard.  

 

Screenshot-2020-11-26-00-43-07-240.jpg

  • Like 8
Link to comment
Share on other sites

Printing of the second half-hull test this night, 8h30 printing with the Mono X Anycubic.

 

It went well this time I had reduced the tear off speed to 3mm/s instead of 4.

 

Everything is well printed, I have a small problem on the foredeck plank only on the port side, but it's my fault, I had removed the under plank on that side, a mistake, the battens were only resting on the hull and as it's not uniform, it was not resting on anything in some places, it's unforgivable.

 

The bulwark reinforcements at the bow are a little deformed, it's very thin, 0.2 mm maybe, I'll have to reinforce them a little. The ones on the first deck are well printed.

 

I was able to place the windlass on the foredeck, it is too big, -10% on its current scale will be perfect. 

 

The rest of the details came out well, especially the hull sheets. They are just prominent as they should be, it will look good when painted matt black. Adding 3D rivets is feasible, but I'm afraid to overload the program with a thousand more items.

 

This bare half-shell is already made up of 700 different objects.

 

Time for photos, the hull is not completely cleaned. 

 

Screenshot-2020-11-27-15-02-58-192.jpg

 

Screenshot-2020-11-27-15-04-09-491.jpg

 

Screenshot-2020-11-27-15-05-14-961.jpg

 

Screenshot-2020-11-27-15-06-06-286.jpg

 

Screenshot-2020-11-27-15-06-50-434.jpg

 

Screenshot-2020-11-27-15-07-31-497.jpg

 

Screenshot-2020-11-27-15-08-15-906.jpg

 

Screenshot-2020-11-27-15-09-19-501.jpg

 

Screenshot-2020-11-27-15-10-01-557.jpg

 

Screenshot-2020-11-27-15-11-30-328.jpg

 

Screenshot-2020-11-27-15-12-39-407.jpg

 

Screenshot-2020-11-27-15-22-28-486.jpg

 

Screenshot-2020-11-27-15-25-02-118.jpg

  • Like 12
Link to comment
Share on other sites

I started printing the forecastle's equipment. It came out very well, better than I expected.

Even the windlass flywheels, which I had already reduced in thickness, came out well with 10% of the basic scale down...

 

I am amazed at every impression by the new machines. The Photons S is far behind. What will the Chinese and Taiwanese be producing next year?...

 

Screenshot-2020-11-28-22-49-53-903.jpg

 

Screenshot-2020-11-28-22-56-38-213.jpg

 

Screenshot-2020-11-28-19-33-52-493.jpg

 

Screenshot-2020-11-28-19-41-33-597.jpg

 

Screenshot-2020-11-28-23-04-50-605.jpg

  • Like 9
Link to comment
Share on other sites

A friend of mine who specialises in the Titanic told me that there was one less port hole on the starboard bow, an eye of Lynx.

 

For the record:

 

That number 3 port hole was perpendicular to the bulkhead of the Ladies' Lounge. So they removed it at the design, the plan must be anterior. Only to starboard.

 

The two aft mooring bollards of the forecastle have also been moved, they have been moved because they were badly placed in front of the front doors, and not very practical in terms of mooring.

 

I have also modified the floor design, but not the design of the floor, which is too technically complicated.

 

I added the anti-roll keels.

 

Screenshot-2020-11-29-00-11-25-837.jpg

 

Screenshot-2020-11-29-00-14-35-398.jpg

 

Screenshot-2020-11-29-00-15-09-936.jpg

 

Screenshot-2020-11-29-00-59-40-007.jpg

 

Displaced bollards, they are used for spring lines.

 

Screenshot-2020-11-29-01-11-27-728.jpg

 

This photo serves as a reference, it was taken at the time I made the model, the first year of operation.

 

Screenshot-2020-11-29-13-11-38-021.jpg


Subsequent photos: here the bridge shelter is already in place, the aft flagpole has been moved. The big mast will be moved later from the first deck to the bridge deck at the rear of the bridge, it must have obstructed the view to the bridge and probably also hindered to board cars on the first deck. 

 

Screenshot-2020-11-29-13-10-27-803.jpg

 

We can see that the bulwarks at the front and rear of the first deck have been cut to take the cars without cranes, perhaps on ramps.

 

ehawuc10.jpg

 

screen41.jpg

 

screen42.jpg

 

screen43.jpg

 

Exploded, more than 600 pieces make up this part, not counting the elements that are not there, windlass etc...

 

screen46.jpg

 

screen45.jpg

 

screen44.jpg

  • Like 6
Link to comment
Share on other sites

Printing of the final front half hull today with the few modifications.

And I continued the design by starting the aft half hull in a new project on Fusion, because the program couldn't take it anymore... The rendering of the bow is not so good, it's normal because it's simplified with an STL file.

 

Screenshot-2020-12-01-00-50-28-079.jpg


It's almost straight, it's going fast. Tomorrow I'm really attacking the back. It will take longer.

 

Screenshot-2020-12-01-00-52-05-157.jpg

 

Screenshot-2020-12-01-01-04-02-070.jpg

  • Like 9
Link to comment
Share on other sites

I'm working on the stern at the moment. I've just about reached what I wanted after, as always, some trial and error on this part, which is always difficult to model.

 

The plans of the couples that I would qualify as sketches didn't help me much, fortunately thanks to some very good photos found yesterday on Flickr, I was able to make progress on the vault that is not so easy to reproduce correctly.

 

It's still at the draft stage, I still have the horizontal hull lines to add to refine the curves and modifications on the shape of the frames to make. We'll let the drawing rest until tomorrow, the good night will give us some advice... 

 

The propellers are in divergent mode, they will also have to be designed, but that will be the subject of another episode. 

 

Screenshot-2020-12-02-17-22-36-702.jpg

 

Screenshot-2020-12-02-17-30-40-608.jpg

 

Screenshot-2020-12-02-23-23-06-044.jpg

 

Screenshot-2020-12-02-23-23-41-046.jpg

 

Screenshot-2020-12-02-23-24-36-891.jpg

 

Screenshot-2020-12-02-23-42-15-657.jpg

 

Screenshot-2020-12-02-23-52-17-446.jpg

 

 

  • Like 7
Link to comment
Share on other sites

Redrawing the back part for 2 days is not perfect, but I stop there. 

 

Screenshot-2020-12-05-11-34-45-777.jpg

 

Screenshot-2020-12-05-13-57-35-380.jpg

 

There are some changes on this picture of the aft deck and its staircase from the main deck and the number of port to port:


Screenshot-2020-12-06-01-57-35-515.jpg

 

Screenshot-2020-12-06-01-30-50-952.jpg

 

Screenshot-2020-12-06-01-48-05-226.jpg

 

Screenshot-2020-12-06-01-35-36-235.jpg

 

Screenshot-2020-12-06-01-37-00-440.jpg

 

Screenshot-2020-12-06-01-37-37-903.jpg

 

Screenshot-2020-12-06-01-38-16-802.jpg

 

Screenshot-2020-12-06-01-40-13-605.jpg

  • Like 5
Link to comment
Share on other sites

Not having a picture of the SS Nomadic's transom, I had to dig around to find out about the steering gear that was outside at the time, later removed for a smaller, more reliable system with hydraulic jacks, sheltered below deck.

 

I came across these diagrams while researching a steering system with its emergency steering equipment that closely resembled what was mounted by Harland & Wolff on Nomadic.

 

This is the system on the 1927 coaster John Oxley, which is currently being restored in Australia.

 

http://johnoxley.org.au/

 

https://en.wikipedia.org/wiki/SS_John_Oxley

 

2560px-SS-John-Oxley-under-restoration-i

 

The system:

 

The main steering is driven by a steam powered steering engine in the wheelhouse. It drives a set of chains and rods that are connected to the quadrant. Tension in the linkage is maintained with a set of springs. The quadrant is riveted to the tiller, which in turn is keyed to the rudder stock. The steering chains curve around the periphery of the quadrant and are secured to the lugs on the tiller near the rudder stock.

The emergency steering is used when the main steering is in-operative. It consists of a left and right handed screw thread that drive the steering arms. Turning the wheel at the front of the assembly to starboard will move the forward arm on the tread forward and the aft arm aft.

The link bars from these arms are connected to the cross head with pins. The crosshead is keyed to the rudder stock. It will make the rudder to move to a starboard helm position.

 

The emergency steering is disconnected in normal operation. The pins are stored in a flat plate with three holes matching the centre pin in the emergency steering assembly and the holes in the wings of the cross head.

This type of steering assembly originated in the hey-days of sailing ships in the mid 1800′s. Our own James Craig, Cutty Sark and Star of India are all fitted with the same type. Interestingly, the steering assembly was made in Sunderland where the James Craig was build.

The emergency steering wheel was hacked off and stolen. A donator is making a new steering wheel.

Block and tackle can be hooked up to the quadrant, if both the above steering mechanisms failed, and only as a last resort.

 

____________________

In fact, this kind of back-up system still exists on some small commercial vessels.

 

http://johnoxley.org.au/artefacts/hand-steering-system/

 

JO-Rudder-elevation-legend.jpg

 

Rudder-plan-and-legend-web.jpg

 

Nomadic is all I have:

 

You can see the system on the back of the capstan.

 

Screenshot-2020-12-06-17-51-18-218.jpg 

 

Today's advances, the bulwark at the stern. 

 

It's going to go pretty fast now because most of the parts are identical to the ones at the front. All that remains is to copy and place them. The capstan will have to be drawn as well as the steering gear device.

 

Screenshot-2020-12-06-18-18-54-031.jpg

 

Screenshot-2020-12-06-18-27-19-397.jpg

 

Screenshot-2020-12-06-18-32-09-268.jpg

 

He was baptised. 

 

Screenshot-2020-12-06-21-52-37-526.jpg

 

Screenshot-2020-12-07-00-01-35-557.jpg

 

Screenshot-2020-12-06-22-30-04-019.jpg

  • Like 2
Link to comment
Share on other sites

Propeller day today, "the test" so dreaded by any budding amateur modeller like me, especially when you have no plan but your photos, it's already not bad and better than nothing...

 

Screenshot-2020-12-10-22-13-44-651.jpg

 

This is my second propeller modeling, the first one for the T2 tanker was not perfect, just acceptable, but it allowed me to develop a relatively fast and efficient method for what we do with it at our scale and for a non-functional propeller.

 

I start by drawing a base profile at the root of the propeller shaft, it will serve as a reference, I incline it at about 45° from the propeller shaft, it's according to the pitch we want to give, I draw an axis perpendicular to the axis of the shaft passing through this profile it will also be my reference axis for the propeller blade. I copy the basic profile at regular intervals along this axis, here 6.

 

I don't have any pictures of this phase.

 

Then I twist the 6 identical profiles by orienting them with an offset of a few degrees identical or not to each profile, we can make a linear step increase if we want to perfect the drawing. 

 

Once the profiles are shifted, I am lucky enough to have a front photo of the propeller in question, I put it as a transparent layer on my drawing to reproduce the shape, because all my profiles are the same size for the moment. 

 

You just have to increase the size of the profile on each side to reach the edge of the helix of the photo, so you always have the particular shape of each helix.   

 

Then I connect by a curved elastic line all the ends of the profiles, going to the last one, but not further, not like in the picture. It will be necessary to proceed differently for the blade tip, the last segment.

 

Screenshot-2020-12-10-15-19-13-901.jpg

 

Screenshot-2020-12-10-15-06-36-114.jpg

 

Screenshot-2020-12-10-15-11-16-866.jpg

 

Screenshot-2020-12-10-15-18-04-276.jpg

 

Screenshot-2020-12-10-15-19-43-122.jpg

 

On Fusion, as the profiles were not flat themselves, I had to use the Patch function to create temporary surfaces without thickness in "3D" to represent my profiles. I'm going to use it to use the LOFT.

 

Screenshot-2020-12-10-15-23-55-351.jpg

 

This is the right representation, the pale end is not yet drawn.

 

Here I have used the LOFT function to create my full 3D volumes.

 

Screenshot-2020-12-10-16-07-02-624.jpg


At the end of the blade I create a micro profile, which you won't see because it's tiny, but it's essential to create the blade tip. From this micro profile I draw two elastic lines towards the next profile, taking care that their curves are very soft and tangent to the other profiles, it is necessary to add points on the curves if necessary to perfectly adjust the edges. 

 

Screenshot-2020-12-10-17-27-48-659.jpg

 

We see here the micro profile at the end of the blade, we can make it even smaller of course so that it does not appear at the scale of the propeller.

 

Screenshot-2020-12-10-17-28-06-010.jpg

 

The Loft function can then be used to finish the blade tip.

 

Screenshot-2020-12-10-17-28-59-313.jpg

 

Screenshot-2020-12-10-17-51-32-308.jpg

 

Drawing of the propeller hub. I added a profile at the root, I was a bit short in blade length.

 

Screenshot-2020-12-10-18-05-22-743.jpg

 

Using the circular "Pattern" function to copy the blade in relation to the shaft line axis.

 

Screenshot-2020-12-10-20-45-00-957.jpg

 

Screenshot-2020-12-10-21-05-51-102.jpg

 

The surface rendering can be further improved by adding 2 rails parallel to the blade axis, but I didn't do it. It's not necessary at this scale, it's very small and just for printing in 3D.

 

Screenshot-2020-12-10-22-09-30-020.jpg

 

Screenshot-2020-12-10-22-13-23-906.jpg

 

  • Like 5
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...