capnharv2 Posted January 7, 2014 Share #1 Posted January 7, 2014 I'm still playing around with transferring the NMM plans of the Ardent Class 64s to Turbocad (v17). Thanks, in part, to the folks on this forum, I've learned a lot and have made a lot of progress. But, I've stumbled across problems that have left me stumped. I had a digital copy of the plans made (I don't know the process they used to make them), so it's been pretty straightforward in tracing the profile. When I start tracing the body plan, I start having problems. The first thing I found was that the body plan is offset vertically from the profile. It's about 10" (when I trace the plans at full scale). It took a while till I figured this out, but I've managed to work thru that issue. Now, I'm seeing angular errors between the body plan and profile. They are off by .5 to .8 degrees (depending on the line I'm measuring). There's also some curvature to the straight lines from the copying process, but I think I know how to deal with that. I'm finding that TurboCad doesn't like to rotate images in less than 1 degree increments (I've tried increasing the angular precision from 2 to 4, but it still won't let me fine tune the angle). I plowed ahead and started the half-breadth plan from tracings of the body plan and the grid of the profile (if for no other reason than practice). The half breadths are way off. They follow the basic shape of original plans, but are offset from the original half breadths in one direction at one point (by about 10") and the other direction at some other point, and spot on in few places. I don't mind redoing the lines if I've made a mistake (I've redone them 4 times already), but I'm not sure how to resolve planss where the orthagonal views aren't orthagonal, and my program doesn't seem to be capable of correcting this. Any pointer on how to proceed? Thanks, Harvey Quote Link to comment Share on other sites More sharing options...
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