This started off as an experiment with making wheels for sci-fi models out of soda bottle caps. Then it turned into a unicycle robot build. It ended up as a monowheel cycle when I cobbled together a seat and threw on some stowage. Now that I see what it looks like with a coat of primer, I'm thinking of adding some wires and a couple more details after some initial painting.
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| Side view after priming. |
Big Wheel Keep On (Not) Turning
The wheel is a pair of soda bottle caps glued together. The edges were sanded down a little so the two pieces fit flush and to give the glue a rougher surface to work with. The ends were also sanded in preparation for painting. The overall shape and the pattern molded into the plastic creates the appearance of a wheel and tread pattern. The idea will come in handy the next time I need wheels for a sci-fi ground vehicle, robot, or in the landing gear of an aerospace craft.
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| Rear three quarter view before primer. |
Unicycle
I was intrigued by the possibilities of the model wheel in my hands. The idea of a single wheeled robot or vehicle has been in the back of my mind for awhile now. A little digging around the bits collection turned up a number of parts that either fit or could be convinced to fit around the wheel. I was initially going for a robotic probe equipped with sensors to explore some unknown world. That's a concept I may return to, but that's not the direction this project went.
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| Rear three quarter view after primer. |
Monowheel Cycle
As I piled things on, the project's appearance diverged from the lines of a purpose-built planetary probe towards a vehicle built from salvage. I started deliberately going for the look of a custom vehicle built by someone who had to scavenge the parts. Greeblies suggesting an engine exhaust and suspension add mechanical plausibility. Some stowage and fuel containers from a Tamiya 1/48 Jerry Can Set give the impression of an owner on the move.
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| Top down view showing stowage and seat cushions. |
The Seat and MDF Reinforcement
Adding a seat was a challenge. With no ready made options at hand, I built one from various plastic parts and used resin sandbags for the cushions. Unfortunately, glue alone wouldn't be strong enough to hold it in place. I used some small MDF pieces to reinforce the seat and add details. These were popped out of laser cut parts from previous projects. Using super glue between MDF and plastic creates a strong bond suitable for structural support.
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| Top down view after priming. |
Priming
Tamiya Surface Primer (L) in Gray spray for full coverage. Priming a project like this is an almost magical moment. The chaotic mix of different colors and shapes turns into a single object, unified under a coat of flat gray.
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| Side view during assembly. A couple details were added before priming. |
Moving Forward
I've got some ideas for putting this project on a plastic base, but there's some testing to be done first. After that, I might brush on some paint to see how it looks with some color on it. Final details will be added after that - I have some wire that will join together some of the mechanical details. And, of course, a couple of wash coats to bring out the details and add weathering.
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