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Re: Crazy Drive Train Ideas
Mecanum swerve :yikes:
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Re: Crazy Drive Train Ideas
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also, when I was thinking of power, I was thinking of the power during the time before the tanks ran out, which I think would be more powerful than the CIMs during the same time period (how would I do the math to find out though, where is the power rating for a cylinder?) |
Re: Crazy Drive Train Ideas
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You can use solenoids in parallel to mitigate this somewhat, but other fittings and line losses limit what you can achieve. A CIM has a maximum power of 337 watts, but this can be sustained only briefly, not the entire match. |
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And... what is this? A student who wants to know how to the math?! I'm confused and terrified right now :D more on this later... Quote:
Back to the math... I assume you are referring to using pneumatics in a reciprocating-piston setup, in which case you can calculate a theoretical power output using ideal Otto cycle calculations, where your volume values are computed by geometry, and your pressure values are determined from approximate flow rates through the supplying solenoid(s). Edit: it won't be exactly like an Otto-cycle calculation, but it will be close, you'll be integrating work done in a PV chart. |
Re: Crazy Drive Train Ideas
The pneumatic cyllinder feasibility problem appeared simpler to me when I thought about it a few months ago. Simply add it in as a "turbo boost" to an existing drive train via a 1-way clutch or paulet system. Linking the two rear drive train axles together with 1 shaft (or 2 shafts + differential) would easily allow for this functionality.
Once implemented, we can analyze the weight: it's about ~15lbs extra, just for a brief turbo boost once or twice in a match. YMMV, but it wasn't worth it for me to investigate further. |
Re: Crazy Drive Train Ideas
If you're hung up on the idea of a pneumatic drive (store energy, then expel it all in one forceful lunge forward), you could accomplish the same thing by using a far more efficient motor, like a CIM, to compress a spring or gas spring (like many kickers did this year).
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Re: Crazy Drive Train Ideas
I use it correctly, 2 years of physics does that to someone :D
There are also always the crazy drivetrains where CIMs and Fisher Price motors are all connected together through a gearbox using planetary gearboxes or some other method to constrain the FP output to the same as a CIMs output RPM. As far as I can tell that would probably be the most powerful setup you could get. Though you would have to rely on Densos, Pneumatics and Globes (if they brought them back) for other components of your drive train. |
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Re: Crazy Drive Train Ideas
Understanding it's still a whacky thought for potentially great innovation (weight aside), the process of implementing it is invaluable. It's probably best done in the offseason though so your competitions have less chance for failure.
Another idea to link a 'turbo boost' to an existing drive train would be feasible if the drive train implemented a car-style setup with a differential that is driven by a hybrid planetary gearbox. By 'hybrid' I mean that there is 1 output and 2 inputs to the planetary gearbox, much like what is seen in hybrid cars. This would eliminate the need for a shifting transmission since the 'turbo' gives the extra power. It may also free up CIMs for use in other systems because an alternative power source is available for the drive train. Depending on the team, that may be worth it even during competition season. |
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