This is just a first draft and needs to be scaled a little better. The rear triangulated part will serve as part of the frame and shock support. It might be hollow to allow for rear wheel travel. This will allow for open additional storage and a place to place lights at the rear most part of the velomobile. Just giving an update on the progress. I have a feeling this will take several drafts before getting everything figured out. I am still learning how to use sketchup. I also need to confirm measurements to make sure I allow for the proper tolerances. Remember the old saying, measure twice, cut once.
This is a view of the bottom back of the velomobile idea.

This is a top view of the frame.

At this stage, it shows the main frame and wheel wells.