Heh, yeah, its a whole lot of guessing. You have to remember the type of models I generally try to make, typically easier to construct, and not necessarily as accurate as they could be. Once I actually make that sort of tutorial, you'll probably get it.
Meanwhile, expect some pictures of my latest model sometime soon.
Well how do you want to tackle it? You can download the newest DC-10 in United Airlines colors and take a look at the way I decided to design the engines. You could even just copy the parts over and use them yourself (though with some modification I'm sure, because they aren't the same shape, and mine might not be detailed enough). The United Airlines DC-10 even includes a little diagram of the engine structure for my model, if that helps.
Yes, thats the L-1011. It needs a little more work before release, but that shouldn't take too long.
Dyna-Soar; that XF-103 is looking good so far. I was actually going to make it at some point, but I don't mind you beating me to it. Can't wait to see more.
I do mostly ignore the front view, yes. The only time I can remember needing it was with the design of the DC-10, for the pattern of the engine turbines.
I do currently use flat parts for the engine bridges. I haven't made any models with wingtips at seperate angles from the rest of the wing, if that's what you're asking about. I've only recently moved from the flat wings to 3-D wings, starting with the DC-10 and L-1011. The rest have used flat wings.