There could have been added lift generated at the higher speed as well, especially in the bow area of the boat.
Boats are also super tail heavy, so boat trailers usually have the axle(s) mounted further back. Whatever the when towing something, patience and smoothness will keep you out of most of the trouble.
Motorcycle wobble can be resolved in two ways:
Slowing down: this makes the wobbles frequency slower but bigger (til it disappears)
Speeding up 😱: wobble frequency gets faster so actually more stable. Gotta have the HP to do so though.
Here it feels like it’s just uneven loading or just not made for those speeds.
Seems like there was too much weight, too far towards the back. OTOH, not sure how he could have loaded it to get that bad?
There could have been added lift generated at the higher speed as well, especially in the bow area of the boat.
Boats are also super tail heavy, so boat trailers usually have the axle(s) mounted further back. Whatever the when towing something, patience and smoothness will keep you out of most of the trouble.