Can you post a picture of the shapes you need to make?


Martin.

In you attachment VIACAD Skin.jpg, I think I see the "open" wing tips you need to close.

Have you tried with the gripper to see if you can "rotate" sweep a surface from one section 90 deg or along an arc to the next position?

If the Gripper cannot help, try using one of the sweep tools. I'd probably start by creating a surface at one of the sections and sweep along the arc to the next, or some variation of that.

Also, try the Guide Skin Surface tool. You might have to duplicate one of the curves and then scale it, or maybe two of them, so that VCP/Shark can have enough curves to form a surface correctly. Try differnt orders in your selection of "Select curves for skin surface" and "Select guide curves".

Thanks, tho, for posting your question, as it reminds me I must reexamine my own model (5-bladed, skewed, raked, CP) propeller.

Your problem is degeneration in the corners where the tip ribs are orthogonal to the wing ribs. You can overcome this by not having the profiles intersect at that corner, although they can come very close to it. If necessary, a minute cover surface is possible to fill the hole, as I've done here, but it's only really essential if you want to build a manifold solid.

Hi Alan

if you can post a file with your upper/lower wing surface plus profile of tip, I'll give it a go. I've done wing tips before and they are not trival. Darcorp did a live demo at OshKosh airshow a few years back using aeropack and polyconic surfaces which takes several hours. I'm game for giving it a go with tangent cover with guide surfaces in shark.

TIm

Hi Alan,
I had quite good results in using tangent cover.
Build your wing profile with upper and lower surface. cut away enough of the leading edge radius so the tangent cover command resembles the profile.
cou can cut the upper and lower win panels with a curve bending towards the trailing edge. You end up with one edge on the upper and lower panel resembling the leading edge and extending into the wingtip root. Now you cover the gap and you end up with a smooth transition between leading edge and tangent continuous wingtip.
Only Problem is: making a solid of it and doeing subsequent operations can deteriorate the quality of the surface....always check!
I have brought that up a time ago. Tim, is there a solution to this?

Hi Guys,

The problem is resolved, it was there all the time. I was unaware that Points could be used multiple times in lieu of a Curve, thus allowing a fan of arcs to produce a curved shell. This is what I produced at my first attempt, the nose shell is replicated in a much smaller size at the rear of the form. It may not be a wing tip but it is part of a good looking wheel spat. The construction is Net Surface.

Thanks again,

Regards,

Alan.