surfacing for blockheads

HP-24 is a very nice looking sailplane.

Bo

Why doesn't it work? Complex edges meeting complex edges is always dodgy and results can change from one service pack to another - it's generally much better to handle it yourself by deleting the faces instead of counting on 'cut with surface' to figure out how to trim and delete the faces for you.

FYI - that is a very old slide to show the basic principle. Today, you ought to first try Insert>Face>delete face, and select 'delete and fill' from the options, and 'tangent fill down at the bottom. Then pick the faces of the block, hit OK and you are done.

Delete and fill is a macro that does the following:

- Deletes the faces of the block from the model (turning a solid model into a surface model)

- Creates a surface fill tangent to the surrounding faces

- Knits the surface fill to the rest of the model

- Converts the model to a solid.

I have run into this problem before. The fix has been to change the shape and/or size and/or location of the "stop" feature slightly. I think the cause of the problem is that the cutting surface doesn't always cut completely into the "stop" feature within SW internal tolerances. So a slight joggle here or there usually makes it behave.