Well, landing a 100 ton aircraft in water is not going to work. It would be safer in the old time with the DC-6's and such, but it is hard to get a 777 down fast on land, imagine water!? Also, it would increase the drag A LOT. The whole point of retracting landing gear was so nothing stayed out. I do belive it is a god idea on little aircraft though. Happy new year to ya!