I once saw a Princess flying. I was in Henleaze, Bristol and she was doing a pass over Filton, or rather Patchway, where the ten Proteus engines were built. No doubt a courtesy visit.
I've never seen anything so totally improbable, she was absolutely enormous, three decks supported by those tiny looking wings. Just like a large building flying over. From where I was there was no discernable sound, very unlike the other big guy who flew over frequently in those far-off years.
All the best with the model, if in doubt do both.