I am trying to work out a system of "energy wings" for large sea-landing spacecraft in the vein of Space Battleship Yamato.
The "wings" would materialize only during sea landing and sea launch, creating a Wing-in-Ground Effect that lifts the ship above the water. They don't allow for atmospheric maneuvers (although they probably work as stabilizers), they are just for the transition in and out of the water. Landing is mostly a matter of airbreaking and then gliding into the sea on the wings. Once in the water the ships are essentially boats. For launch I like Trish's answer about creating rocket fuel from water.
For the moment I am suspending my disbelief that the ship has too many types of maneuvering engines (FTL, rocket, thrusters, jets, propellers…?), and focusing on just the wings and how they are "materialized". Are they fin-shaped forcefields created by rows of some kind of perpendicular energy projection? Or maybe another shape entirely, like something dynamic and undulating? Maybe they are not energy at all but something more mundane like laminar airflow or physical blades that retract into the ship, each shaped like a long thin wing?
As a bonus, could they serve double duty, possibly taking the place of thrusters in space and propellers in water?
Lastly, could energy wings scale down to smaller Ground Effect Vehicles that would need to maintain the wings for hours, or do I need enormous electric engines to generate them? One of my concerns is that I am casually creating a technology (solid force fields) that would essentially make all other technologies obsolete (why have walls if you can project forcefields anywhere?), so my goal is to find the simplest or least handwavium solution. If the wings can only be sustained for a short time because of energy requirements for example, that might rule out smaller vehicles.
The question is not about hard energy shields, and none of the answers in this question appear to apply. Reasons include it needs to function in an atmosphere not a vacuum, and the wing shape is fundamentally different from a shield "bubble" that encloses the ship to protect from projectiles.