Struggling to figure out how to script airship flight

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#1 
local Master = require(script.Parent.Parent)
local UIS = game:GetService("UserInputService")
local player = game.Players.LocalPlayer
local Character = player.Character or player.CharacterAdded:Wait()
local module = {}

Master.ClientEvents.ShipControls.OnClientEvent:Connect(function()
	local IsFlying = Character:GetAttribute("IsFlying")
	UIS.InputBegan:Connect(function(Input, IsTyping)

		if IsTyping then return end

		if Input.KeyCode == Enum.KeyCode.W  and IsFlying then
			print("SpeedIncreasing")
		end

		if Input.KeyCode == Enum.KeyCode.S  and IsFlying then
			print("SpeedDecreasing")
		end

	end)

end)

return module

hey guys, this is my code so far. Any ideas on how I would script flight and control speeds? Ideally what I am looking to do is that when each button is held, the speed either increases or decreases at a steady rate. I have an idea on how to do that via a loop, but how do I transfer this over to the server in an efficient way? I do not want to use Roblox seats