Hi. This is my HeliCarrier. I originally built the Marvel one but it turned out to be completely impractical as a working model, so I designed my own.
It has 2 decks for landings and taking off, and you can toggle the plane lifts to lower or raise aircraft between the levels. It has places to park extra aircraft. Anything that looks like a door is a way in or out of the carrier.
Warning, due to KSP physics, don't try to walk a Kerbal on deck during flight, as they will rag doll.
It has rear engines and an RCS system that click in to a central node, simply place them just after spawning the carrier, before you move it to do anything else. Also remember to set the carrier to an independent throttle, so you can set it to hover while flying places.
I highly suggest the following mods to go with it.
AIRCRAFT CARRIER ACCESSORIES https://spacedock.info/mod/1068/Aircraft%20Carrier%20Accessories
For helping to land and secure planes while the carrier is in flight.
WASD Editor Camera Continued https://spacedock.info/mod/56/WasdEditorCameraContinued
So you can get around the size of it when building.
Physics Range Extender https://github.com/jrodrigv/PhysicsRangeExtender/releases
So you can fly around , land and takeoff while airbourne without the model unloading on you.
And something to be able to spawn the carrier out in the water.
Warning, do not spawn the carrier on the runway or it will destroy the runway.
Enjoy
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