I have noticed that bad behavior on the C172 and I really believe that the problem is due to the wind.We know that on the runway the C172 is very difficult to handle with winds…same happens on water.However ,while on water,If you give more power and go faster then you can make turns more easily.It looks like if you “navigate” at low speed the rudder is unable to compensate the wind effect.
I agree with you.I am on SU9 too and can confirm once more that there is a problem with the wind effects on some boat planes like 172 (which has the exact same problems on the runways…) . I have just tried once more a “see navigation” with the C172 and,if you set custom weather and zero wind,you can make nice turnings. With winds,instead, the effects on this kind of planes is strong (plane nose goes toward the wind, as it does IRL…) and difficult to counteract with the rudders.However,at about 10 kns,if you give thrust and rach about 50 knts speed, you can make high radious turns…if you have enough water around you.
I have recently purchased the sea plane Savoia-Marchetti (very nice plane) and did the same trials on custom set-up with and without winds and it always turns nicely on water…So,in my opinion, it is really a problem related to the config of each type of the planes.
However,it’s possible that things got worse on SU10 BETA as RATTMAN is reporting.
I have encountered the same issue today. C172 Float (steam gauge variant).
Landed at a seaplane base with roughly 10kts headwind.
When I wanted to turn around to make it back to the docks, I could not for the life of me turn the aircraft around. Full rudder turned the aircraft roughly only 10-15 degrees to either side, before the aircraft hit a wall and bounced/got pushed back. Same into the other direction.
In the end I had to use slew mode to get back to the docks.