step.0
this project has been on my mind for a while (4 years) and I
have always been postponing it for lack of time and resources....
the idea of a monowheel is not actually new, look around on the web 
and find out that it's been there for almost 100 years [even patented]

 

step.1
this model was inspired directly from the anime Steamboy, but
as I have not the same resources as little James, I just thought about
working with local means. so the first thing to do is have a bicycle
and measure it as exactly as you can, so the design is most precise.
then you can do it (redesign) manually or you can put it in a
computer-aided design (CAD) program


step.2
right after that, is to start investigating the bicycle mechanics
if you aren't already familiar to it by disassembling it and try to
learn the most you can about it.... it is really useful

 
step.3
to start looking for the right wheel radius (also measure yourself)
and make it more efficient and accurate I draw (with rope and chalk)
on the floor concentric circles with different radios to
calculate with the disassembled bike its position in the monowheel
so I could have a much better and real reference


  step.4
for the gears rotors I wanted to simplify the most I could the
redesign so I wouldn't change the original mechanics




the idea I came up with is to weld some steel rods wich will
hold the gears and still gain the effort from the existing
pedal system, so first I made a model with tape and cardboard



these are the two rotors with the welded steel rods
[the one on the left is the front rotor, the other is the back one]


  step.5
the wheel itself got its mechanical force directly from the gear,
[which is operated with the regular bicycle system (step.4)]
that's why is a triple-MDF-layer-sandwich, with the outer
circle-layers (MDF 9mm) as guides for the main gear and the inner
circle-layer (MDF 30mm) is the geared-wheel which gets the
force [mechanical energy] from the main gear



step.6
after verifying the design, each part is segmented into pieces so they can
fit in to the size of the MDF board (and also the CNC cutter)
[this is preferable to be done and specified by oneself in case it isn't printed in a fablab]




 step.7
once each piece is identified, the assembly process can begin


step.8
to cover up the surface of the geared.wheel that "hits" the floor
(or any surface the monowheel is driven on) I cut and screwed the
rubber of the bicycle tires and a couple more I bought


step.*
testing can be a game
=)