I need help with a weld script? [Unanswered]

alright so this weld script doesn't work and i've tried a lot of other weld scripts but they all don't work my plane just falls out of the sky the parts in the plane (class names I mean) are WedgePart, Union, Part and thats it in play mode the thing just falls out of the sky after I Unanchor it and parts fly everywhere from the plane

if someone could just help me clean up this script and fix it that'd be great!

Here's the script

local pln = script.Parent 

local w = Instance.new("Weld") 
w.Parent = pln
w.Part0 = pln.Union
w.Part1 = pln.Union2
w.C0 = CFrame.new(0, 0, 6)*CFrame.new(0, -math.pi/5, 0)
local w2 = Instance.new("Weld") 
w2.Parent = pln
w2.Part0 = pln.Union
w2.Part1 = pln.Union3

local w3 = Instance.new("Weld") 
w3.Parent = pln
w3.Part0 = pln.Union
w3.Part1 = pln.Union4

local w4 = Instance.new("Weld") 
w4.Parent = pln
w4.Part0 = pln.Union
w4.Part1 = pln.Part1

local w5 = Instance.new("Weld") 
w5.Parent = pln
w5.Part0 = pln.Union
w5.Part1 = pln.Part2

local w6 = Instance.new("Weld") 
w6.Parent = pln
w6.Part0 = pln.Union
w6.Part1 = pln.Part3

local w7 = Instance.new("Weld") 
w7.Parent = pln
w7.Part0 = pln.Union
w7.Part1 = pln.Part4

local w8 = Instance.new("Weld") 
w8.Parent = pln
w8.Part0 = pln.Union
w8.Part1 = pln.Part5

local w9 = Instance.new("Weld") 
w9.Parent = pln
w9.Part0 = pln.Union
w9.Part1 = pln.Part6

local w10 = Instance.new("Weld") 
w10.Parent = pln
w10.Part0 = pln.Union
w10.Part1 = pln.Part7

local w11 = Instance.new("Weld") 
w11.Parent = pln
w11.Part0 = pln.Union
w11.Part1 = pln.Part8

local w12 = Instance.new("Weld") 
w12.Parent = pln
w12.Part0 = pln.Union
w12.Part1 = pln.Part9

local w13 = Instance.new("Weld") 
w13.Parent = pln
w13.Part0 = pln.Union
w13.Part1 = pln.Wedge

local w14 = Instance.new("Weld") 
w14.Parent = pln
w14.Part0 = pln.Union
w14.Part1 = pln.Propellar1

local w15 = Instance.new("Weld") 
w.Parent = pln
w.Part0 = pln.Union
w.Part1 = pln.CamPart

local w16 = Instance.new("Weld") 
w.Parent = pln
w.Part0 = pln.Union
w.Part1 = pln.Propellar2

local w17 = Instance.new("Weld") 
w.Parent = pln
w.Part0 = pln.Union
w.Part1 = pln.Propellar3

local w18 = Instance.new("Weld") 
w.Parent = pln
w.Part0 = pln.Union
w.Part1 = pln.Propellar4

if anyone could help me make this more efficient and not so long of a script and tell me what I did wrong that'd be great! :D