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plane catapult

a catapult concept it works all you need to do is paste it in a ship and add the throttle lever for the rotation the just get in then plane start the engine full throttle press the track brakes button and press 4 for the rocket boosters once you are safe in the air press 5 to drop the boosters
just remember that you will need to add a keep active block on the ship the plane and the booster module

the plane is just for example you can use your own planes on the catapult