Model Boat Mayhem

Technical, Techniques, Hints, and Tips => Other Technical Questions... => Topic started by: Garabaldy on May 06, 2008, 09:51:42 am

Title: Hull building
Post by: Garabaldy on May 06, 2008, 09:51:42 am
Ok i have some jpeg plans for a tug.  The hull drawing with all the "squigly" lines on it is just an end view showing the profiles of the "frames".  But thats all there is, no drawing showing the she shape of the hull with all the contour lines.  But after some messing around in autocad i managed to produce one but when i project the positions of the frames they are not evenly spaced along the hull.  Does this matter or have i gone wrong some where?
Title: Re: Hull building
Post by: FullLeatherJacket on May 06, 2008, 10:19:29 am
You may well find that the frames are drawn closer together where the curvature of the hull changes more sharply i.e. at the bow and stern. If you "wire frame" you 2D views then any horrible mistakes will jump out at you!
Title: Re: Hull building
Post by: Bryan Young on May 09, 2008, 06:01:03 pm
Haven't we touched on this before? It's a common mistake for a modeller to confuse "frames" and "sections"...or "stations" on a hull drawing. For modelling purposes forget "frames". I doubt many modellers have hull drawings with the frames marked anyway as they are constructional and about 2' apart. However, the stations (a sort of frame drawing) are equally spaced along the vessels length. In the "middle" part of the hull where the lines are reasonably similar the stations can be drawn at full distance apart. Let us assume a ships hull with 20 stations. From station (say) 7 to (say) station 14 they can all be full distance apart and equidistant from each other. At the ends of the hull you will probably see the stations are "halved" you get 6.5, 6, 5.5, 5 and so on..and a very fine hull may even go to quarters...but the prime numbers are always equidistant from each other. Hope this helps. BY.