Step #1
Draw two rectangles.
Step #2
Draw shapes as shown.
Step #3
Draw rounded shape.
Step #4
Draw a rectangle as shown.
Step #5
Draw the shape as shown.
Step #6
Draw shapes for silencer.
Step #7
Draw orbiter.
Step #8
Draw doors & lights.
Step #9
Draw front portion & enhance the drawing.
Step #10
Make necessary improvements to finish.