OK - the Basics....
Over the last 15 years I have ridden trikes with various fairings from the Zzipper custom on the Trice to the Streamer that used to transfer between the Street Machine, Hurricane and Trice
My 1994 Trice with Zzipper:
Fairings will NOT increase your speed greatly, but do provide an enhanced level of protection against wind, rain and bugs. Also increase your road presence as well.
They can however interfere with light fittings, and mega-lights within the fairing will illuminating it to a point which can affect night vision.
For this reason I use two fairings on my Catrike the Windwrap GX and XT fairings, the latter for summer use and the former for winter. Having said that the GX could be used all year. SIdewinds can be a problem, but trikes are stable enough not to be "drifted" like a two wheeler
The GX is more Streamer like, but is more flexible and I find the fittings more adaptable and easier. Foot clearance is simply fitting it in the right position, I have size 12s and it only took me two tries to fit perfectly.
The XT is far enough forward not to affect getting on and off the Trike, but both the GX (optional)and Streamer will tip forward to allow you to enter without having to limo under the fairing. Both GX and XT also allow lights to be easily fitted outside the fairng. Not an easy option with the Streamer.
For my money I find the Windwrap GX a better finished product and one that is easier to fit and position than the Streamer. It will fit the Scorpion.
I would also not be without one. The IoW Randonnee yesterday was an excellent example of why!
Ian (CatrikeUK) imports the Windwraps for his trikes.... but could advise on the Scorpion
Have a look at the
Windwrap for further details
My Catrike with GX fairing in place
My Catrike with GX Fairing in place:
The lights fitted outside the fairing: