CAD (vector) drawings of CP 19 ?

[Dingo]

I am looking for vector graphics of the CP19 pls.  All I can find are raster line drawings.

Does anyone know if the 'lines' are available please ?

thanks

Dingo (based in UK)

[HenryC]

When I wrote my article on the CP19 a few years ago, the designer, Robert K Johnson, gave me a set (on paper).  I seem to have misplaced them, but I'm sure if he still has the file he (or his son, Kirsten) might be persuaded to send you a copy.  The Johnsons are the owners of Island Packet Yachts, in Florida, and they can be contacted through the  IPY website on the internet.

You might also contact the the manufacturer of that hull, Com-Pac Yachts (AKA the Hutchins Company), also in Florida, and also on the Net.  Since that highly popular hull is no longer in production (the tooling was destroyed), I can see no reason why they would not be willing to pass the lines on as a historical document.  Those hull lines deserve to be resurrected.

It might be helpful to you to know that the CP19 was popular in Europe, where it was known as the "Compac 20".  Perhaps some third party took off the lines and they may be available under that name.

Good Luck,
Henry Cordova
Please feel free to mention my name when making your request to these gentlemen.

[philb Junkie19]

I'm also looking for design info. I need to know the fore /aft position of the center of effort (CE) for the CP19 II. I think I have it calculated.  Using a downloaded and printed drawing and using the sails as drawn I calculated it the aft side of the mast. However there a are a couple of possible sources of error. One is possible distortion in downloading and printing the other is calculating sail area of main and jib. Listed, measured on paper and actual sail measurements show some differences.  I'm wondering if someone has a lines or other drawing the shows the CE position.

[skip1930]

What the heck is a vector drawing? Anyway...









skip.

[Allure2sail]

Hi:
Perhaps if you could find someone in the CAD profession they can bring in the vector files (pdf or jpg?), then scale them to the correct dimension. Once scaled up you can trace over the image with splines or line segments to create a flat 2D cad file. Once the side, top and end views are created they can model the object in 3D. This process is done when industrial designers sketch up a product concept and want a cad model created from it. After the cad model is created they can have a model maker produce one or most likely in this day and age they would have it made with a 3D printer or a SLA machine. I may of over simplified it but there is a route to go from 2d scanned files to cad files and then to 3D models. The most difficult part would be what's called lofting the hull. That is where the section views of the hull come into play. There are programs out there that are great at lofting. Rhino 3D is one, check out their website and look in their library section of marine models created by the users of Rhino. There is a  boat building software package called I believe FASTSHPS which is supposedly Rhino with a customized user interface for designing ships.
Good luck with your project
Bruce
S/V Allure
Swansea , MA

[Dingo]

thanks everyone for the speedy and full replies.


I have a techy background, so reckon I can transfer black and white pics (as Skip has kindly posted) and make a set of lines for CAD.

I'll dig around and see what I can do.

Cheers !

Dingo.


BTW

My boat number is ABV 00545B 191, then a gap and 19.The first bit I am happy with decoding thanks to earlier posts, but the 19 ?

[skip1930]

I took my drawings to copy place and I used my ** 'scaler' to extend the hull and all the rest of the draws into a larger size. On this copy machine, the enlargements are scaled up without distortions. A few copies on heavier paper make swell templates.

Build with the templates glued to a building board and fair-line using a thin, flexible balsa stick. Whittle her to shape just like we did in our boat building class at the Door County Maritime Museum.

** The 'scaler' is a PS 80 Proportional Scale  It's about 8 inch in dia. ~~~~~~~ Measure the length of the lines and spin the wheel around to the new size you want. That gives you a % increase. Dial that % into the copy machine and hit print. You can find these 'scalers' at any good drafting supply/art supply store for about $9.00's.

Say the original drawing is 7-1/2 inch stem to stern. And you want that line to be 25-1/4 inch ... so it says % of original size is 349 1/2 % larger. Punch that # into the copier and hit print. may have to cut up the original drawing then paste all the copied papers together.


skip. You could also glue a bunch of Styrofoam boards together and carve and sand to shape.