Planes use skis to land on ice/snow runaway.
How can the plane brake in such conditions?
Friction must be limited to allow takeoff and aerodynamic braking are not the main contributors to the deceleration on wheel landings.
Aviation Stack Exchange is a question and answer site for aircraft pilots, mechanics, and enthusiasts. It only takes a minute to sign up.Sign up to join this community
You may find this manual of interest from the FAA. The short answer is that they simply don't brake or have breaking mechanisms like wheeled aircraft do. For what its worth with sufficient runway you don't need brakes to stop a wheeled aircraft either. The airframe often provides enough drag to bring the plane to a stop in a reasonable distance. You are generally correct that aerodynamics are not the primary method of braking, however they can in some cases be a sufficient method. On top of that ski operations are often flown from say a frozen lake or similar area where there may be a great deal of unobstructed distance for takeoff and landing.
There are some types of skis that allow the wheels through them to facilitate both snow and hard surface runway. In some cases the wheels may contact the ground beneath the snow and allow for traditional breaking or they may be plowing through the snow providing drag.
Full aft elevator and retraction of the flaps will increase aerodynamic resistance of the airframe and downforce in the skis, reducing the amount of time and distance required to stop the skiplane.
Seaplanes have the same issue.