wrkempson
-
Content Count
291 -
Joined
-
Last visited
-
popeye the sailor reacted to a post in a topic:
Stage Coach 1848 by Eddie - Artesania Latina - Scale 1:10
-
druxey reacted to a post in a topic:
Cutter Grace 1763
-
wrkempson reacted to a post in a topic:
3d printing crew figures
-
mtaylor reacted to a post in a topic:
Shrouds for Revell CSS Alabama
-
I have used the plastic chains and channels. I suspect this is what you mean by the "platform" for the shrouds. I also used the kit's deadeyes and lanyards (the round things with ropes between them). The only part I discarded was the preformed shroud and ratline piece (looks like a triangular ladder). So, using the plastic parts, I set up the shrouds as was done in real practice. The final result was quite pleasing. You have already chosen plastic as the medium for your model, so there is no real requirement that you use wood deadeyes. I have followed this procedure on three of the Reve
-
Bob Cleek reacted to a post in a topic:
Galilee's Rabbet
-
Galilee's Rabbet
wrkempson replied to CDR_Ret's topic in Building, Framing, Planking and plating a ships hull and deck
Terry, I think your observations in the original post are entirely correct. I might add that there are some conventions in ship plan drawings that are not to be found in the actual construction of the ship. Rabbet lines are one such convention. The dotted lines on the body plan are indeed indicators of the depth of the rabbet, but the actual lines would be quite fiddly (read: almost impossible) to loft and would be of no value at any rate. On the profile plan the "flat" stretch of the inner rabbet line is not in fact flat; but since it varies from the width of the garboard plan -
wrkempson reacted to a post in a topic:
21 ft Yawl Longboat for a Sixth Rate by vaddoc - Scale 1:10 - Plans from the National Maritime Museum
-
wrkempson reacted to a post in a topic:
Need CAD type program
-
rshousha reacted to a post in a topic:
TurboCad curving surface of King's insignia to cannon surface
-
I have no knowledge of Spanish practice regarding the rabbet and the keel. I say this to excuse myself from comment only because I would like to be helpful but my knowledge base is restricted to English ships. I do observe, however, that on RN drawings the keel is more of a convention than an actuality. The men in the yard would not use a drawing to cut in the rabbet. So, to answer your question one would have to know the practice of the Spanish yards. All of this is to say: I don't know. Wayne
-
wrkempson reacted to a post in a topic:
H.M.S. Atalanta - Drafting my own plans
-
wrkempson reacted to a post in a topic:
An attempt at hull modeling with Fusion 360 Loft + Rails
-
wrkempson reacted to a post in a topic:
USS Oklahoma CIty CLG-5 (1971) 3D CAD model
-
Am I following a good approach, or are there features of Fusion 360 that I have overlooked that would make this easier? I believe your approach is sound and you are not missing some "secret." Programs dedicated to ship hull design handle things pretty well it seems (I have not used one to date), but hulls are fairly challenging for programs like Fusion 360. On the TurboCAD forum a ship's hull is something like the Holy Grail of lofting. How do incorporate the station lines that couldn't be used in the loft + rails? It helps when all the stations have the same number o
-
Fusion 360
wrkempson replied to Williamo's topic in CAD and 3D Modelling/Drafting Plans with Software
Mark, I found this and it may solve your problem. My copy of F360 refuses to load for some reason so I can't check it out, but it sounds to me like the answer you need. https://forums.autodesk.com/t5/fusion-360-design-validate/rotating-3d-wood-material-in-render-mode/m-p/7905382#M155048 Wayne -
A work around for TC Deluxe is to put your monogram on the barrel, then create a tube around that section of the barrel that has an inside hole that matches the barrel as to angle but is (say) an inch larger in diameter. Then subtract the tube from the monogram and you will be left with an upper surface of the monogram that is curved with a radius parallel to the barrel. Takes but a minute.
-
Breathtaking. The level of detail is amazing. Congratulations on your work. It seem to me you must have a very large file for this project. Can you give us an insight into how large? What are your render times for the complete model? And, just because of curiosity, what is your computer set up? I would guess you have a pretty good bit of horsepower. Thanks so much for sharing. Wayne
-
See above post #22. Does Solidworks have something called a Style Spline and is that the same thing as a Bezier? I can spell Solidworks and that exhausts my knowledge of the program. I may be confusing you by using the names given to spline tools in TurboCAD. At this point, it seems to me that splines and their control points all use the same equations, but differ in how one manipulates the control points. To be sure, I am not the person to opine here in that my acquaintance with mathematics falls in the interested hobbyist category. There are videos on YouTube that explain Be
-
internal framing
wrkempson replied to rth385's topic in Building, Framing, Planking and plating a ships hull and deck
I am with Druxey on this. Take a look at this part of EdT's log on the Naiad (a vessel of similar size and construction). This is page two of his log, Find post #57 and begin reading. You will find many helpful photographs of how the internal planking might be done. As a further caveat, Steel says that the limber strake is drawn on the inboard profile plan as a line parallel to the cutting down line (which amounts to the bottom of the keelson). On Steel's plates this line for the limber strake runs the length of the keelson, although as Druxey ponts out it is fairly im -
You ready for this bit of wisdom? It depends. I used something that TurboCAD calls Beziers which is fit points plus control handles for every point. I have more trouble with the other versions of the spline (by control or by fit points). I find "fit points" easier to use than "control points" and Bezier easiest among the three. So I would say use what makes the most sense to you. I would expect there to be a learning curve on using splines. rtwpsom2 says he prefers the control point splines to Beziers, I have the opposite preference, mostly on the basis of what I am most acc
-
I am not a mathematician nor do I play one on TV, but I find the visual explanation of Bezier curves to be quite interesting. The math behind it is barely in my range of comprehension. This link gives a picture of how linear, quadratic, cubic and quartic curves are generated. This is a very amateur understanding, but it takes something of the mystery out of how the spline is drawn and what is happening as it is adjusted. https://www.jasondavies.com/animated-bezier/ Also, the Wikipedia article on Beziers has some interesting animations about two thirds of the way dow
-
Both the drawing and your procedures are works of art. Thanks for sharing. I did not understand how the offset of the splines was used to center the traced working line. This may be because I do not have access to Solidworks. Still, I couldn't get my head around the theory of it, but it sounds like a useful thing to know in general (unless this is Solidworks specific). It seems you have a very good original plan. Even at that, I take it you did a bit of work to straighten some lines out prior to use in CAD. I find all this very interesting. The tools available to
-
Good observation, Rick. When you speak of splines are you including Bezier curves in that category? Frankly, while I use Beziers quite often, I cannot think of a time when I have used a traditional spline. The control handles on Beziers make them a very powerful way to create a curve. With that said, and with my completely amateur status noted: The "arc or spline" question might have the age old answer: it depends. For earlier plans arcs reflect the original practice; so if you want to mimic the old ways then an arc is your friend. On the other hand, later plans I suspect mad
-
If your program has this tool, construct a circle from three points along the curve of the stem. I would use a portion of the curve that does not intersect the base line since if there is more than the one arc, the second arc will be found at the base line. The center of the circle will of course be the center of the arc. The same end is accomplished geometrically by placing three points on the stem arc. Join the bottom and middle points with a line. Draw a perpendicular line to this line that bisects the line. Repeat the process for the middle and upper points. The intersection of the
-
It seems to me that a measurement taken from the plans should trump one taken from elsewhere. A contract measurement might trump the plan but only if the contract is for the specific vessel at hand (ie, not from a sister ship). My observation indicates that the lines on the plans are about 1/4" wide or so, so a variance of 1/2" is understandable in this case. I love the zebra analysis. The curvature of the rabbet in the area of the fore foot seems to be off, but that is due to the program, not your work. Wayne
Our Emblem™
