<https://www.avsim.com/forums/topic/608595-big-radials-p-40-tail-drag-modeling-the-worst-of-our-options/#comment-4643295>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.avsim.com/forums/topic/608595-big-radials-p-40-tail-drag-modeling-the-worst-of-our-options/?tab=comments#comment-4643131>