No wand, with or without wheels, can match the shear cleaning capability of a rotary. Not even close.
I went Bank Rupp so I was not able to make this wand.
The Best Portable ETM Ever Designed - Eletric Truck Mount Portable | TruckMount Forums #1 Carpet Cleaning Forum
This here is a concept I thought of. When using a carpet cleaning wand to clean carpet, This shows a modified solution delivery system. The jets are to impact two side of the carpet fiber almost at the same time if the wand is moving with about 400 PSI to 800 PSI.
I want the jets to spray on the sides of the fibers, hoping that the fiber moves so the solution can hit the base of the carpet fiber with out penetrating the carpet backing.
Also, I think as I have not tested, the force should push out sand and soil that gets imbedded in the lower parts of the carpet fibers.
I also think that the flow of solution may build up on the ends. There needs to be small channels that goes from the solution delivery head to the intake vacuum head. The channels are on each end 4 total, to draw the build up of the solution at each end of the wand.
This is the reason I like the 1,200 PSI pumps with over 2.2 solution flow. I think this will clean carpet a lot better then some wands made today.
I also think the rotary carpet cleaning tools need high water flow and some times 500 PSI to get heavily soil carpeting cleaner.
To have fewer solution jets, I found a better jet where 8 jets may cover a 16 inch area or a 16 inch wand, 4 jets spraying one way of the other 4 jets.
As I have not tested , I be almost sure 8 jets can cover a span of the 12 inch wands.
It is also best to use 12" or even 14" wands with high powered portables.
See the jets below.
This here is a water jet, made of plastic and used for underground sprinkling. It is the best image I could find on line to show a better water jet.
If one like this type, like a flood jet with about 1/8 or 1/16 inch opening, enters the chamber on the side instead of the top, using about 1/2 less jets, custom made to apply a even spray on carpet, is probably easier to make and maintain then the original jets I had showing in drawing.
TeeJet - Boomless Spray Nozzles