Re: A parade of spaceships...
^^ First I created the outline of the fins. Then I created the shape of the edge and used the Follow Me tool to extrude along the outline. You then have to use the Intersect tool to merge some of the conflicting surfaces after the extrusion. After intersecting you cut away the excess, connect the furthest points to each other to complete the sides then finally soften the lines to get a smooth surface.
STAR TREK: 1964-1991, 2013-?