This is a simple 3d model of an ogive nose cone. There are two triangles that join inside the nosecone that form a platform to tie the string around for parachutes. There is also a much deeper ring for connecting string, that you can use if you want to. This design is a bit stronger, so that the nose cone won't just break off from the force and get lost. The best part about this nosecone is that since it has the files for the top and bottom separate, you can customize the size of the bottom piece or the shoulder to fit inside you body tube snug.