Basically you want a side slip. I.e. go straight but maintain a bank.
Usually never done in any normal conditions on any Airbus except in engine out case, where up to 5 degrees bank in a side slip may be commanded.
So if they accept just need to simulate an engine failure. Reduce the thrust to idle on the engine on the opposite side to which you want to lower the wing on. Ask pilot to go to max engine out alt that way you'll get max power from engine producing thrust which will give the maximum bank.
use a 320 without sharklets.
Hahaha this is crazy.