you really did a good job with this; great job with the perspective view! i didn't have time to give mine a perspective view they probably DQ'd mine and yours for "shading" (which wasn't explicitly prohibited by the rules )
I hate perspective views! XD, my first step was always to imagine the ship and later to try the views with sketchy lines, the reason to participate was that a lot of people can see your work and comment, thats cool ^^, thanks for your words and sorry for my rusty english XD!
I love this technical drawing skill, I hope it is not DQ'd because of no measurements or a 6th "left" side view. This is great, great show of technical skill. WONDERFUL! (one of my TOP-10 for sure). Good luck!
Also, I see now that it just says "Sketch" as the description. Even more impressive that one of your "sketches" would be in my top-10 in terms of skill. I too lean towards hand-drawn designs, and understand the difficulty and challenge a design like this presents. Good luck to you!