I think Doug Moon tried this already, with very poor results.
The closest to a side force generator I've seen might be the tall forward set canopy on Russian F2B ships, or the big. tall forward set canopy and turtledeck of Stiletto or Patternmaster, etc, ships.
I would guess that the aoa of the R/C side force generators when in knife edge flight is much more than the aoa a C/L plane could present , so they may have minimal effect in C/L maneuvers, but present alot of sail area for the wind to disturb the model.
Steve