when you say without the arcs at the end , you mean the large bulbous ends of curvature graph ?
I cant dispense with the bulbous ends of aerofoil sections
That will mean redrawing (rebuild) the aerofoil sections, and rebuild does deviate from original curve shape, not just resite control points, it loses the curve accuracy, but I am also instructed to surface wings etc with them along lines that are drawn between their x/y plotted half cosine etc points. I am in a position to supply thw drawn sections to those that require them as per originals. ( I shall have to have another chat to my recipient, he might need a stiff drink !)
your surface is greenybrown by the way.
I see your surface goes beyond the central panel and down to leading edge, though it doesnt match it.
I also see that it overides into the 4 sided corner portion sweep that was Stratosfears approach, avoiding sweeps to points etc. I am now bemused as to if I do it this way, how do I get to skin the remainder as it looks like I am back to pointed sections. I spent some time, more time than I cold afford in fact, figuring out the 4 edge method, isocurves etc, and them messing up my profiles as you spotted. I need to keep my corner sweeps and sides etc. The leading edge misfit ?
I am with two approaches now and more than a little confused. I still havent confidence in loft having seen it not follow the edge rails. and matchSrf not fixing it without causing a massive gap. Somehow with time now almost having run out, I am not sure of my next move. I dont have time to rethink to this degree on this task.
I can try for the simplifying curves approach on the next task. The thing is, I am making an item from one plan and much later, a year maybe, I make another and the two must fir, working to the curves (not tracing them) on the dimensioned plans they were designed to fit 70 yrs ago, but if I rebuild to make the curves smooth, things will intersect and not abutt. I am unsure of that. If I supply my work to someone else who is also aviation precise, he might not be happy if things dont fit. its all a bit unsettling, pleasing rhino and deviating from original shapes.
I have tidied up the 4 profiles, only two wanted any attention, the one with one glitch I deleted an edit point and all is well, a 1mm square filled my screen and the before and after curve shows no difference aprat from one less edit point.
The one as explained with the extended curves for the Pascal corners, I nudged using 0.001 a few clicks and the down spike is now gone. reckon i gave it 0.004 nudge. as my final result is ok for +/- 1mm this sort of thing has me concerned given the time involved.
P.S see addendum in post following observation of poor CG’s for profiles, I realised why one profile was no longer perfect.
P.P.S I now see why things may be squiffy, I had 13 control points to my curves, by doing the Pascal corners they added in a few more, so now I have to try and keep this curve the exact same shape, else my top surface wont match that abutting it, rebuild I guess as longas its deviation from my original curve is within tolerance, it says 0.003 for 13 and deg3, so maybe I am ok.