This is going to be a rather long post, so fill up your... drink... holders...
I'll go in order, why not.

KH-100 Krackabloa Clipper

The Very First

The Clipper was the very first 'KH-' designated aircraft, and the very first of my craft to have the double-fuselage design (using two fuselage pieces in an over under layout for a larger overall fuselage), although subsequent propeller-driven ships would have a single, linear fuselage design. I was rather hard-pressed to find flaws in the Clipper, and sitting here in my Algebra 1.2 class, I can think of none.

...But Not Quite The First

The Clipper was only the first to be 'KH-' designated, but its predecessor was the founding point for my current livery. That said, the livery was the only thing that it established, having a single-fuselage design, and making extensive use of the modular cockpit block as opposed to the RCS nozzles currently standing in for windows.

KH-110A Island Hopper

Put It On the Ground

The Hopper was a very simple aircraft, with the wings consisting of only two sections each, and the empennage bits only one each. One major flaw: IT HASN'T GOT ANY WINDOWS!!! Another major flaw: IT HAS TWO GREEN NAV LIGHTS!!!

KH-130 Duke

Not a Baron...

The Duke was an aircraft that gave me quite a lot of trouble during designing, as its small size combined with the original landing gear placement made appear that it was reluctant to touch the ground (it looked like it had massive legs). The propeller clearance was yet another issue. At least this one had a red nav light.

KH-140 Starliner

The big'un

The Starliner was an aircraft with many flaws, including, its two green nav lights, lack of tail insignia (seriously), the fact that the inboard props have roughly a smurf wiener's worth of ground clearance, the wings being rather too forward-set for my liking, the round cockpit top-bit, the fact that the windshield is visible through the bottom of the fuselage... Yeah, not very fond of it. I feel as though if I got it right the first time, It would be a great aircraft approaching the levels of the Clipper. The Clipper. Yeah.

I thought it was original...

I spent the longest time thinking of a good 1940's-1950's-sounding aircraft name, but one that was original, see, and I thought when I got to 'Starliner' I hit the jackpot, right? Perfect name, and completely my own. Never before seen. And it didn't sound ridiculous, like Kinglifter. What sort of name is that?! (I'm kidding, Mr. Emu, don't hit me pls) Anyway I was browsing around on Wikipedia, and I happened across an aircraft, first built in 1956 in Burbank, California by the Lockheed Corporation as the last model in the Lockheed Constellation line, the L-1649 Starliner. WHO WOULD USE STARLINER AS AN AIRCRAFT NAME?!? IT'S A RUDDY IDIOT NAME, STARLINER!! IT'S NOT AS THOUGH AS IT'S ACTUALLY GOING TO 'LINE THE STARS', IS IT!? WHY DID SOME GIBBON IN A SUIT AT LOCKHEED GO "ohr, wee have thees plenes, called conshtellashunsh, lets name them STARLINER OOOOOHH" LIKE NO FFS MAN, THAT'S A TERRIB-wait oh whoops well its not stupid when I use it, see it... nobody... asked... you...

KH-200

The first King of the Jet Age

Ah, the 200. The founder of all my jet designs to this date, the KH-200 was my 707, my DC-8, my Convair 880, the romantic end of the past and the start of the future. So few problems arose during design that I was almost careless, but not quite, leading me to correct every problem that showed itself.It perfected my double fuselage design originally set by the Clipper itself, the small on top and the large beneath. It was the basis for my original flap design, with the actual lifting done by internal VTOL nozzles, and the apparent lifting done by the structural panels, with their simple rotation and flare on the outboard end. It was the first to have the Nav and anti-collision strobes bound AG8 and the flaps and landing lights to AG1.

The Supersonic Turbofans

One particular issue was the engines originally being powered by the Blasto J90 turbofans that it appears to be, allowing it to be massively overpowered (it could break 400 mph on the Wright North Strip). My solution to this is my solution today: Hiding VTOL engines inside the fuselage, then placing VTOL nozzles on each engine, allowing for acceptable thrust, while still keeping each engine necessary. The only problem with this is that it allowed my windows to function as they were supposed to, as RCS nozzles. Well, I solved this problem by binding them to [redacted]. This also allowed me to use VTOL nozzles as flap replacements, by binding them to AG1 and VTOL. However, using VTOL controls also flared the engine nozzles outward. I solved this by binding them to AG[redacted] and controlling them with [redacted] and setting [redacted] to [redacted]. [redacted].

KH-210

McBigWings

The KH-200 was my DC-8, so it only made sense that the -210 should be my DC-9 (it was originally going to share a similar design to the 727), and I feel I did a rather good job, if we choose to ignore the fact that the wingspan is wider that the entire aircraft is long. Aside from that, nothing is really wrong with this aircraft, and despite the original 210-1 being over ten feet shorter than wide, it flies rather nicely with a wing loading under 40 pounds.

KH-220

The definitely-not-737

The KH-220 was fully 'inspired' (a replica of) the first the variants of the 737. (-100, -200, -300) The -1 was the first aircraft of mine to feature thrust reversers, bound to AG2, and not quite reversers of engine thrust, but rather thrust facing forwards, as I wasn't intuitive enough to actually make the engine thrust fire forwards, but rather stick J15's (or was J50's?... hmm...) in each engine nacelles and have them bound to AG2 and pitch up to activate. Either way, throttle control could be set to zero and they would work regardless.
Eventually, the dash-3 was born, with my horse-spankin-new engine design, the inlargnefnak OMG ITS SO COOOL!

KH-240

The Fat and the Mighty

The KH-240, oh my yes. Yes, indeed. Possibly my favorite aircraft to fly, the -240 is both a huge technical advancement, and really big, and something else. It was the first to have a four-fuselage design (FOUR!), first to be designed and and flown on my computer. It had an array of AG-bindings, with landing lights and flaps on 1, speedbrakes on 2, taxi lights on 3, Anti-collision strobes on 7, navs on 8. It (kinda) perfected my flap design, making it more of a Krueger-flap design, both sliding back and rotating down. Originally it was nestled nicely in the wing, with but a inch showing itself. However, the flap design was not perfect. Both the prototype and the two current production variants had flaps which did not slide backwards smoothly, but rather moved half a notch rearward, slowed and appeared tense greatly, then suddenly released, flew aftward and bounced back and forth, eventually stopping in the correct position. Worse, retracting the flaps, it shows reluctance on mobile, although with some coaxing it retracts properly. However, on PC (or at least Mac) it refuses entirely to retract past the first notch, and on occasion, under unknown conditions (possibly its own) the entire flap assembly will detach itself and end up lost somewhere in the ocean (or on the blastpad of Yeager runway 01 right). Worse still, on engaging the autopilot, the sudden reset of the VTOL control leaves it fully retracted, but stuck almost a foot above the rest of the wing in a rather hideous position.