NRG Photographic Model Ship Competition - All eligible to enter - Reduced memberhsip fee - JULY 31 ENTRY DEADLINE
×
New Banner Ad Sponsor - Epic Engravers - Great plank bending machine (also bends thin metal sheets) and unique engraved coins to label your model displays!
×
vwmiller
-
Posts
6 -
Joined
-
Last visited
Content Type
Profiles
Forums
Gallery
Events
Everything posted by vwmiller
-
I agree with Mr. Cleek, seek out an appraiser to find a value. The workmanship appears to be very good to excellent on the ones you have pictured. Again, in agreement, if they are from kits, usually the value doesn't even equal the price of the kit. A scratch built model is worth much more. I refer to mine as "white elephants", in that they are interesting (to those interested in such things), but take up a lot of space and need to be properly cared for and placed inside a case. If not in a case, the lines tend to collect dirt and dust. If nothing else, you may want to donate them to schools, libraries, or local museums etc. that may want them. Although they probably wouldn't buy them, you can take a tax deduction based on the value. One other option is to take them to a craft fair, many times there are people who attend these fairs that would be interested.
-
Framing Math
vwmiller replied to vwmiller's topic in Building, Framing, Planking and plating a ships hull and deck
Jaager: Thanks again. I found that scanning the Marquardt book to be no real problem, the two pages match almost exactly. As to Underhill, I figured 5mm = 1', and as 5mm = .1968" and 1/5" = .20", I was right on. I'm relying on Marquardt, only using Underhill as a reference on places to small to see from the scans. Luckily I bought both the Endeavor and the Constitution book back when they were new for a reasonable price ($35?). Can't believe how much they went up. I was also lucky in buying the 4 Shipwright Annuals before Conway press closed. vwm -
Framing Math
vwmiller replied to vwmiller's topic in Building, Framing, Planking and plating a ships hull and deck
Wayne: Thank you for the info. The one book that I found to be very informative is "The Text Book of Laying Off, or The Geometry of Shipbuilding" by Edward Attwood and I.C.G. Cooper. As you say, they show the actual method used, not the math part. Very informative anyway and methods that can be transferred to model ship building. vwm -
Framing Math
vwmiller replied to vwmiller's topic in Building, Framing, Planking and plating a ships hull and deck
Mr. Jaager, thank you. Sounds like a simple direct solution. I checked and they are running a special offer for v. X9 for $39.99. Would this be the one that I'd want? Special runs for the next two days. The problem I have is that the drawings between Marquardt and Underhill do not match. Marquardt has more detail, and Underhill does not have what scale he drew it to. There's a blurry scale on Underhill's drawings, and from what I can tell it seems to be 5 or 6 mm = 1', which to me seems strange as you'd be mixing metric and English units. There is also a difference of just over 1 foot in the keel length between the two. I'm taking it for granted that both would have gotten the original dimensions from the same source, as I don't believe that there would be multiple drawings of that ship, if there's any at all. Something more to figure out! Thanks for your help! vwm -
Framing Math
vwmiller replied to vwmiller's topic in Building, Framing, Planking and plating a ships hull and deck
Thank you all for your input and help. I should have mentioned that I do not have, or have access to, any 2D or 3d CAD programs. All of my drafting is done using the age old pen and ink method. I was out of engineering just as CAD started to come in. I recounted, there are 105 frames on the ship! And you're right Jaager, at mid section the shape is very box like. It's only forward and aft where the hull takes dramatic curves. I've been doing the "lofting" technique when drawing up the frames, then smoothing them using a real spline curve. Just thought that a math equation would be easier and repeatable by just entering the points and letting the math do the smoothing. vwm -
I am trying to find a math equation that describes the curve of a ships frame. I have plans to build the Endeavor based on the plans I obtained from Underhill and reference of Marquardt's book. I plan to build this as a plank on frame, but do not look forward to trying to lay out 90+ different frames! What I believe is possible is that if I could discover the equation for the curve, I could insert the different points into a math program I have on the computer, and the resulting graph could be printed out as a template for the frames. I have researched my math books and purchased a number of books on ships construction, etc. without finding a clue. I have a background in engineering, so complicated equations are no problem. I have looked in NURBS, Bezier curves, T-splines, etc. Either I'm missing it completely, or in retirement I've forgotten more than I learned (extended senior moments!). Any help would be appreciated! VWM
Our Emblem ®
