He does attach large foam (pipe lagging?) to the bars.
But - there’s no way I’d ever want to intentionally “land on water”!
And “pondering the risks of flying over water” suggests you’re thinking about emergency situations?
So - the chances are …
- the “landing” on water won’t be gentle
- therefore it probably won’t land skids first
- the surface of the water won’t be like glass
… so - I don’t believe they’re much use … and you still have to find a boat to get to it before waves mean it topples.
I’ve flown loads over water - long distances (Video - Thread) - and it’s simple … if something happens it’s a gonner!
The additional weight / air resistance just means you stress the motors and batteries more and increase the chance of a problem. My opinion.