It's incredible how many differend grays and browns you have used! All the reflections, especially on the cyan/blue part look so good. The big and visible strokes brings it to life. I can't understand how the picture can be so messy and detailed at the same time!
Oh jeez. This is quite awesome. I love how you stick to a messy design, where nothing's all detailed crazy like other dudes, but you can still see the work put into it, and you can still make out enough details, like the pilot's silhouette.