Quote:
Originally Posted by asid61
I used the JVN calc "rotary mechanism" tab. To calculate load I used
wheel width * 1/4 bot weight * CoF. In my case that was 0.75*37.5*1.3, or about 36lbs. Then I added a ~1.5x factor of safety and decided on 50lbs as a good estimate for loading.
Based on what I'm seeing here I guess I'll just suck it up and use a 500. Kind of unfortunate, but I'll take what I can get.
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1/4 bot weight per wheel is a best case scenario. Expect to routinely get pushed onto one or two wheels during pushing matches and having more weight on certain wheels when accelerating. 1/2 or 3/4 * bot weight seems like a far safer number.
Drivetrain is a terrible place to try to skimp out on. I want my drive to be as reliable as possible. I'd be especially concerned with the intensity of pushing matches and the small breaks between matches during eliminations, where reliability is the aspect that differentiates between teams the most.
In my mind, reliability trumps weight in this situation given that 540s are already pushing limits because they aren't very well suited to the needs of your steering motor.
That's one of the saddest stories I've ever heard. When your green isn't neon enough, you are in big trouble in FIRST. - JaneYoung [more] 
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