If not immediately on impact, then shortly afterwards as the plane's momentum carried it downstream. Here's a photo of the plane as it was coming in for it's landing in the Hudson River. You can see both engines are mounted close to and below the fuselage. In that location, they would have acted as huge water scoops, probably helping to keep the plane from cartwheeling. But the weight and action of large volumes of water rushing through the already damaged engine housings likely would have ripped the engines off the plane.
Thanks! Good pic!
Wolfstar
I wonder about that...
He came in with a high AOA. My guess is they would have contributed to a cartwheel and he is trying to prevent it.
When a Seaplane or Amphibian land with the gear down in the water it flips. I wonder if that goes the same for Nacelles.....