The Ship Model Forum

Hey guys real life kicked in full force and I am needing to save me a lot of time so I am looking for a lofted hull for the Bismark in either silodworks, Delftship or IGES format.

Can someone out there help a fellow out.

joe

I been trying to work on the hull a little as i get a few mins but I am stuck at the Stern area. maybe some of you guys used to solidworks or whatever can give some tips.

Heres a closeup of the area

Don't do the skeg yet. The skeg is the vertical piece that the rudder mounts to. Do the hull form first completely ignoring the skeg, then add the skeg later and blend it with a fillet.

ummmmm lost me there. this is basically the first time I been trying to loft up a hull , for that matter do a ship as I been used to planes.

I am just using the outlines and stuff from the drawings. I dunno what is or isnt part of the skeg, how to redraw the stuff so that I dont get the skeg, or much else with ship hulls thats why at first I was trying to find a pre done solidworks or Delftship Bismark Hull because for those that use solidworks knows the program is really super good for being able to reverse engineer how someone did a drawing.The prog is made so a person can just have a solidworks part in front of them and be able to see step by step what someone did without having the person there to explain it.

thats why I was looking cause when it comes to ship hulls I am totally lost on stuff like mentioned abt the skeg etc.

Joe

I've had luck Lofting a solid block then rendering the ribs/stations, or whatever you want to call them in order right after the other. Now do a Lofted Cut and take it to shape like your "carving" it. *Sometimes Guide Curves are not your friend*

It can be done with each rib/station drawn in whole to make a solid but its a

You could try another way of doing this by rendering the hull in multiple sections and making an assembly drawing from that. I find myself having to do this third method all the time.

When I was messing around with the USS Ohio drawing in 1/96 the same stern problem came to bite me in the @$$. Your not the only one.

Solidworks 2006
&
MasterCAM X3

TommyL.

One last thing. I see from your posted pictures that you might be having trouble with the leading edge of the Bow and Stern. Are you? If you figure out a way to Loft these with the rest of the hull please let me know.

TommyL.

are you saying do a lofted cut between 2 stations then move to the next and cut then so on?

Joe

In a way yes but doing it with all ribs/stations.

Let me reinstall my software or find if I was smart enough to back up one of my other drawings to you can pick it apart and see.

.....................nope I didn't back up my stuff so I guess I will just have to draw up something tomorrow quick.

TommyL.

the bow and stern are easy to do. theres several way to do these. what I like to do is take the leading edge and split it in half top and bottom half. then add a sketch point in the center. when you loft you loft from the first station to the sketch point. then use the top guide and bottom guide and the top view outline as your third guide and it should loft right up.


Joe

Hey guys,

Be careful about posting your email address in forums. Spambots will find it and you will be inundated with spam.

Use the message part of the forum to contact other forum users.

He's actually right. I didn't think of that. Proflooney go and edit your post without your mailing address. I've got it saved.

TommyL.

kk think I got it a little better now

That is looking better. Add the bow and stern and then you can add the skeg. add just an extruded surface for the skeg from the bottom up into the hull, then fillet it with a multi radius to blend it into the hull surface. If you have problems getting it to blend, you might need to go back and do the hull as a single surface because SW has difficulty filleting across more than one surface (e.g. if the fillet cross a surface boundary or edge).

yea I did it as seperates so that the belt ledge didnt go all the way to the bow or all the way to the stern like is does when I do it as 1 loft. what its wanting to do when I do it as 1 loft is to blend the ledge to 0 over several stations instead of just to the next one.

as far as your radius blend thing I have never done that in SW before so will be another challenge

Joe

ps also I have to get the round part in on the Skeg to accomodate the center prop shaft which comes out the center of the stern

Joe

For the prop shaft, make a surface revolve. Use a surface extrude for the skeg. Then fillet everything. As for the armor belt, ignore it until you have your outer surface finished. Then do a surface offset inward. Don't try to make surfaces for the transitions areas until you have made the cuts in the surfaces, then use filled surface and boundary surface to fill the gaps. This will make it easier for all the surfaces to meet up when it is time to make the hull a solid.

well Rob got 2 problems here. 1:im totally lost as its my first ship and 2: i have never done any surface modeling. I always worked with solids as have never needed to learn surfacing.

do have some kind of sample file I can reverse engineer to see what you talking about?

joe

No, unfortunately. Like Tim, all my CAD belongs to Dragon. I looked for some older versions of my hull that I did, but I must have lost them in the great crash of 2009.

I hadn't realized you weren't surfacing, I'm sorry. I would suggest you need to spend some time learning it because it is absolutely the best way to make a hull. It is also a skill most drafters don't learn in SolidWorks which would give you an advantage over them come hiring and/or firing time. Try getting Matt Lombard's surfacing bible, it is extremely useful. And don't expect it to work overnight, I spent months learning it.

If you decide to stick with solids, then I certainly won't hold it against you, surfacing is a hard thing to learn. But I don't have as much experience with doing the hull in solids.

ok thanks. yes I usually do solids as all the work I do and need done requires solids. I am used to getting some really nasty curves etc done in solids with my planes and other stuff so I never had a need to learn sUrface modeling. that said I learned solidworks in 3 weeks on my own so if I can find some good tutorials shouldnt take me long with surfaces. the problem I have right now is when I am doing planes I have done them so long that I can look at a plane and see every shape in the thing. when I look at a ship I only see guns and not shapes yet. ))

Dont look like much but this was one of my toughest lofts mainly because of the elevation differences and the major shape changes