Steamboat first.
For some reason, I love steamboats. I don't know why, but I just adore the two windows, the smokestacks, and all the machinery greeblies. When I saw that strange boat hull in a pile of Legos at my fat friend's house, I bartered it off him (easily, him being the awesome fat friend he is) immediately knowing it would make a perfect steamboat.
I like to load my steamboats with barrels of junk. Here it is, finished, with all sorts of random crap in it.

For more pics, click here.
Next, the Space Freighter.
This DT-2400 is owned by a small-time smuggler Jex Hantiir. He drives around, smuggling illegal spice and munitions.
I built this ship for one purpose only, to test a light-up hand-powered thruster system, with no battery boxes needed.

You can attach a hand crank to the nub here:

When the hand crank is turning, two things happen. First, the pulley piece on the back spins fast. Second, the fiber-optic brick inside lights up each one of it's lights in a circular motion. If it's kinda dark in the room, it looks really cool.

The faster you turn, the faster the lights spin around. This is an absolutely crappy picture of it, but you get the idea.

This is the inside system. You can see one motor and the hand crank axle, connected and geared for speed. What you can't see is the other motor. I discovered, if you connect two motors together and turn one, the other outputs power to anything connected to it, and it turns the shaft on the other motor. The second motor you can't see is connected to the first motor, and also to the light brick. The shaft of the second motor is connected to the light brick also. So when you turn the hand crank, it turns the first motor, which provides power and power output to the second motor, powering and spinning the light brick.

For more pics, click here.
That's all, folks! Tune in next time, for another
Dr. X Mocstring!
-Dr. X