I made a small plugin for Sketchup where you can draw/sketch straight horn with any number of petals with any number of conical segments that span the length of the horn.
It is very simple to use. The user must input number of segments, and then input information for each segment.
This is just intended as tool for anyone who uses Sketchup.
Link to zip file containing plugin. I is different where you must place the file, but there should be a plugin folder somewhere in your Sketchup installation.
Input number of segments to begin with
Input data for one segment at a time. If you just press enter, the default values will be used.
Enjoy your creation