the departure angle is good
the angle for entry and departure
the angle for approaching any kind of incline, or departing
imagine going down something like a ramp, or driveway, and transition onto a level surface.
you'd notice motorhomes with extended bodies way past the rear axle, which leaves them with a very shallow departure angle, which pretty much limits their use to very level surfaces, which is great in limiting people from living in their motorhomes in the hills.
however, you do see motor homes with decent entry and departure angles.
however, if you do not pay attention to those 2 basic angles, your vehicle, can potentially be limited.
with the above trike, quite possibly a simple transition from a driveway ramp, across a gutter of much significance, onto a road that is perhaps convex in profile... possibly could be a source of contention
as it may sound ridiculous
its not that uncommon, especially in areas where water drainage is a concern.
i've also noticed this concern with Velomobiles
once upon a time, i was seriously considering building a Go-One