Empennage, Horizontal Stabilizer, Vertical Stabilizer Horizontal and Vertical workHours this entry: 4.5 July 20, 2014 chris Spent more time priming the rest of the parts for the right side of the Horizontal. Quick shot of some of the ribs and stiffener. In addition to the priming, it was time to start deburring, dimpling and prepping the Vertical stabilizer for primer.