Bellerophon
Sorry - any multi, not including those with centre line engines, having ANY measure of asymmetric thrust will be sideslipping in straight flight whether wings level or banked.
When banked the moment of the horizontal component of lift acts around the lateral centre of pressure to balance the moment of the asymmetric thrust around the same lateral centre of pressure.
Weight does not play a part, except in manoeuvre, as one cannot have a resolved portion of the weight through 90 degrees.
Sounds like the sideslip indicator on Concord was a con.
I would like to be proved wrong!!