Quote:
Originally Posted by sanelss
the mounting for the steering isn't really a problem any which way just needs to be worked out. The worm is just one idea and a place holder, there are several options we can do for steering.
yes those are 6" wheels. the point was to start large and we can design down if need be but from previous years there may be a need for large wheels so good to have the option.
the goal of that shifter is just having a shifter at all. we can certainly use other systems but that's what just initially came to mind in regards to weighing a minimal amount and ease of construction.
the weight is unknown. our goal is to start off with the lightest materials available then upgrade parts as they fail. because yes weight always comes up as an issue.
aha oh yes failure... no matter how hard you try it's always just around the corner =p At least from this design everything is easily accessible and swappable. a screw or two(and maybe a retention clip) and absolutely any part on this should be able to be easily replaced.
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Sounds okay to me, except for the shifter. The reason I don't see it working out is because it will be unreliable and inefficient. The pneumatic cylinder approach won't work in your application because it will shove the gears into one another too close, causeing them to bind (especially once the teeth wear down), and this could potentially destroy your entire drivetrain. There is no easy way to shift gears penumatically unless you want to machin dog or ball shfiter shafts, or buy them.
Due to the height of your assembly, I would definitely flip the cims unpside down too, and shift on the coaxial shaft of the module. That will save a lot of weight and space. For shifting, just slap a 2-cim ballshifter on there or make a custom gearbox using ballshifter parts and then put the output of that to the coaxial shaft. This will lower your COG considerably and provide more reliable shifting, and it shouldn't be too difficult to machine. The base ballshifter only give a little bit of reduction, so teh final reduction can still be on the chain going to the wheel.