text: 
  """This example file demonstrates the construction of a simple rocket.
  The corresponding .ork file is the OpenRocket implementation of the same rocket for comparison.
  """
  import numpy as np
  import matplotlib.pyplot as plt
  
  import rocketPy as rp
  from rocketPy import ureg
  
  
  ## First, create a rocket.
  r = rp.Rocket(name='Simple Rocket')
  
  ## create a nose cone
  nc = rp.NoseCone(name='Nose Cone', diameter=6*ureg.inch, fineness=3, material=rp.materials.PLA())
  # assign to rocket
  r.set_nose_cone(nc)
  
  ## create a BodyTube
  bt = rp.BodyTube(name = 'Body Tube', diameter=6*ureg.inch, length=48*ureg.inch, wall_thickness=2*ureg.mm, material=rp.materials.Phenolic())
  # define its location
  bt.set_position(after=nc)
  # assign to rocket
  r.set_body_tube(bt)
  
  # create a boat tail
  boat_tail = rp.Transition(name='Boat Tail', fore_dia=6*ureg.inch, aft_dia=4*ureg.inch, length=4*ureg.inch, material=rp.materials.Phenolic())
  # define its location
  boat_tail.set_position(after=bt)
  # assign to rocket
  r.set_boat_tail(boat_tail)
  
  ## create the fins
  fins = rp.FinSet(name='Fins', n=3, span=6*ureg.inch, root_chord=12*ureg.inch, tip_chord=6*ureg.inch, mid_sweep=10*ureg.degree, tube_dia=6*ureg.inch,  thickness=2*ureg.mm, material=rp.materials.Aluminium())
  # define its location
  fins.set_position(end_of=bt, offset=-fins.root_chord)
  #  assign to rocket
  r.set_fins(fins)
  
  # plot the entire rocket
  fig = plt.figure()
  ax = plt.gca()
  r.plot(ax, unit=ureg.inch)
  plt.draw()
  
  # describe the rocket
  r.describe(describe_components=True)
  
  plt.show()
  