Robert Holme

[Robert Holme]

On Maryak’s example, stations 22 to 32 won’t give you very much information, furthermore, they would look like an unreadable big pack of lines, because they’d all look the same.
The best is to have all three views (side, top, front/back).
.

??? Maybe you are confusing stations with frames i.e. 22 -32 consists of 3 station profiles not 10 all looking the same.

[Robert Holme]

An example of uneven stations Frame Spacing 1 ft 9 ins

[Robert Holme]

An example of uneven spacing

[Robert Holme]

Sounds good to me with one proviso…………………..Stations are not always evenly spaced longtitudinally, i.e. the number of frames between station x and station y may not be the same as the number of frames between station a and station b.

It is usual to have more stations at the extremities, (bow and stern), where hull shape changes are more pronounced than midships where hull shape between frames is very similar, if not the same with high block coefficients.

HTH Maryak

[Robert Holme]

Yes provided you know the stations, (transversals), locations along the keel line and vertically up from the baseline.

HTH
Regards Maryak

[Robert Holme]

Hi Tim,

Yes its hard to get your head around the bow and stern of 18th/19th century wooden ships.

Attached is a model of HMS Beagle. Note the use of layers to give control to visibility and hydrostatic calculation.

HTH
Maryak

Attachments:

• Beagle2.fbm

[Robert Holme]

Check the settings in your locale. The mix of Cyrillic and western characters is most likely due to to non-unicode characters being presented as western if your locale is not Russia (Россия).

Regards Maryak

[Robert Holme]

Sorry about that
Quick and dirty flat bottom

[Robert Holme]

Add extra points at the Z axis along the y axes and make a sub grid of the area where the hull is flat bottomed.

HTH
Maryak

[Robert Holme]

The Greenwich Maritime Museum is a good starting point.

[Robert Holme]

AFAIK the free version no longer supports the IGES format. i.e. you need to export to another format and use a 3rd party for IGES; or buy the professional version.

HTH Maryak

[Robert Holme]

The blade count has an effect on Underwater Noise i.e. the idea being to reduce pulsation between each blade and thus the amount of noise generated, particularly at low propeller revolutions as this usually when a submarine is at its most stealthy and is harder to hear coming or going.
The requirements to keep the reactor cooled in Nuclear boats means they generate more noise than a battery powered (Conventional) boat. The latest French design is a pulse system where the propeller is inside the hull and draws water in and out through a duct. Cavitation and accoustics are theoretically reduced compared to a conventional external propeller.
HTH
Regards Maryak

[Robert Holme]

BZ Icare.

My method has been to draw a screw in CAD, export as VMRL1 file.
Import into DS and save as part.

HTH
Regards Maryak

[Robert Holme]

Download a copy of Freeship and open the file you received
Export the Freeship file as a part file.
Start a new empty Delftship file with the same LBD units as the Freeship part.
Import the Freeship part file into your newly created Delftship file.

HTH Maryak

[Robert Holme]

Hi Iosif,
Attached is modified fbm with layer close hull removed, stations buttocks and waterlines added, mid point set at 1 metre and transom closed in layer strake 1.
I don’t see the need for 2 layers in such a simple design.

Regards Maryak

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