SS Hydrograaf, 1/100 3D, hydrographic ship, Royal Dutch Navy

[Devin]

Beautiful work! I love utilitarian boats.

I've read through this entire thread and don't see mention of what software you're using. Rhino by any chance? I've done a few hulls in Rhino --I'm an architectural model maker and that's our software of choice at work -- and always found lofting the hull shapes a bit tricky.

[Iceman 29]

Thank Devin, i use Fusion360 from Autocad, a very nice program to draw industrial pieces, but less for ship hull, not easy because the limitation of this program.

I've just uploaded a trail version of Rhino 3D to test and learn to draw hull.

I could use the two programs alternately to model the ships. But it's going to be expensive to license.

The advantage is that Rhino's licence is permanent, which is not the case with Fusion360.

[Iceman 29]

I fitted the missing railing, the stairs to the forecastle, the descent to the lower deck under the forecastle.

[Iceman 29]

Drawing of the main deck floor and forward skylight.

[Iceman 29]

End of the skylight drawing, add some details of the bulwark. Starting to draw the hull plates, quite time consuming.







Thanks to a friend for this nice picture of the front clerestory, it allowed me to refine it.

[Fliger747]

The skylight casing is very much a period item, reminds me of the era of the very classic and still operating Star Ferries in Hong Kong. A lot of available delicious detail items!

Cheers: Tom

[Maarten Sch�nfeld]

Lovely detailed skylight! And I notice that in the current situation the forecastle deck has been extended backward nowadays? Plus the obvious wooden bulkhead with two doors just forward of the skylight.

[Iceman 29]

That's right Maarten. Thank.

I continued today to draw the planking, the deck portholes, the coal bunker filler hatches.

[Maarten Sch�nfeld]

Hi Pascal,

You're going nice! But are these deck details not a little too prominent? I'm afraid your vitual crew will trip over them and break their virtual neck! I would make them almost flush with the deck.

[wefalck]

Maarten is right, as nicely done as they are, the coal scuttles etc. should be flush with the deck, as seen also on the photographs.

Not sure, how it is done on the prototype, but a typical solution is to frame the deck-planking with L-irons (as on the forecastle), which then forms a gutter together with another L-iron that runs inside of the bulwark. The gutter thus formed then is shaped with a cement mixture into a trough - the idea is to prevent water from accumulating in the corners of the L-profiles. The stanchions for the bulwark would also be standing in these gutters, rather than on the planked deck. The reason is that that fitting the planks around the stanchions and sealing the perforations against rot would be difficult. I would check this my assumption against prototype photographs, of course.

Nice progress otherwise

[Maarten Sch�nfeld]

... Not sure, how it is done on the prototype, but a typical solution is to frame the deck-planking with L-irons (as on the forecastle), which then forms a gutter together with another L-iron that runs inside of the bulwark. The gutter thus formed then is shaped with a cement mixture into a trough - the idea is to prevent water from accumulating in the corners of the L-profiles. The stanchions for the bulwark would also be standing in these gutters, rather than on the planked deck. The reason is that that fitting the planks around the stanchions and sealing the perforations against rot would be difficult. I would check this my assumption against prototype photographs, of course...

Yes indeed, a clipping from an earlier posting shows these gutters on Hydrograaf were exactly as Wefalck describes:

[Iceman 29]

Thank wefalck.

@Maarten

The extra thickness is deliberate, because you always have to think about the paint and how you are going to paint these details easily. So I left 0,15 mm to make it easier.

You can see the gutter on the sides in this view.

The extra thickness won't show up at this scale, I'm not even sure it will show up in the print.

[Iceman 29]

Replaced the legs in the gutter.



Overview.

[Iceman 29]

Drawing of the pipes on the deck, probably of the steam pipes for the windlass, and the skylight in front of the castle.

Various modifications. And I continued the drawing of the hull plates.

[wefalck]

Strange pipes. Normally, there would be one (insulated !) pipe to the windlass. This pipe should have a diameter of about 5 cm without insulation, I would guess.

Perhaps these are modern hydraulic pipes supplied from a central pump. Still strange, as an electric motor would be more convenient than a hydraulic one.

[Iceman 29]

No hydraulic oil system at the time (1910).

Only steam or men's arms.

I worked on steam winches in the 1970s when there were still turbine on supertankers ( ULCC / VLCC) . The winches and windlasses still worked with steam. On deck the pipes were not always insulated especially the condensate return pipe to the boilers aft.

The problem with the insulation outside and especially at the forward of the ship is the sea breeze in bad weather and rain. The insulation remains wet and corrodes the pipes quickly, they are only hot when the winches are used of course, so rarely.

There is not one but two pipes at least, one that brings the live steam to often 15 bar, and a condensate pipe that brings the condensed or semi condensed steam back to the boilers. Sometimes there was a third, smaller pipe which allowed the steam engine and steam line to be heated so as not to damage the special Monel spiral wound joints. The condensate pipe is always of larger cross-section.

On this picture taken in 1976, you can't see any insulation on the pipes, this ship is new. We can see protection for the mate against burns.

[Fliger747]

Pascal:

A very convincing virtual world! At some point soon will you begin producing hardware? To accomplish this will you begin reducing the virtual model into printable pieces?

Cheers: Tom

[Iceman 29]

It's almost done for the hull to the main deck, Tom. The first part, the superstructures will be the second.

Many of the small parts on the drawing are ready to be printed.

I'm waiting for the hull to be finished so I can hollow it out and cut it into two 20 cm long pieces. I've done a test already but I didn't print it, the hull without support for the moment:

You have to take your time and check everything again before printing the big elements, a mistake is always possible leading to a loss of time, precious printing hours for the printer, and wasted resin.

[wefalck]

I didn't realise that the pipes were in the drawing, I thought they were based on the photographs of the ship in preservation, hence the idea of hydraulic pipes - hydraulics in principle existed in 1910, but not for exposed parts, such as winches. I think hydraulic steering gears were invented before the turn of the century, but I may be mistaken.

[Iceman 29]

I found that:

https://www.arts-et-metiers.net/musee/m ... lique-case

https://translate.google.com/translate? ... lique-case

"An ancient history.

William Armstrong was responsible for the first hydraulic cranes (1850) based on Pascal's theorem.

In 1889, the lifts of the Eiffel Tower were operated by hydraulic cylinders using water from the Seine. Around 1900, attempts were made to use hydraulics for the transformation of movements. Glycerine was added to the water to prevent it from freezing, and it was replaced by vegetable and then mineral oils.

From 1910 onwards, the hydraulic fluid was used both as an energy transmitter and as a lubricant."



First Hydraulic Motor:

http://info.texasfinaldrive.com/shop-ta ... have-known

The first hydraulic motor was developed by Lord William George Armstrong in 1876 for use with a swing bridge over the River Tyne in London, England.

The original motor is still in operation as it swings a 900 ton bridge span about a central pivot point that works much like a gun turret. It was revolutionary in its time, and despite the years it remains both practical and functional.