Wheel size considerations

[sdcantrell56]

For what its worth we have designed an 8wd frame using 5" wheels with no chance of bottoming out. Getting creative with the frame helps a lot

[Kage]

My team is discussing 4WD... 8" wheels and with the 29" wheelbase that we want, I just went through the calculations, and our robot will make a MAX 24.443 degree angle with the playing surface...
that is ALOT less that I had originally thought!

I dont think huge wheels would make any better improvement on this...

[ebarker]

Originally Posted by Kage

MAX 24.443 degree angle with the playing surface...

so what you are saying is you can do this within 1 / 1000 of an inch ?

[DonRotolo]

Originally Posted by thefro526

We're leading towards using 6" wheels in an 8WD.

Yeah, that's where we're leaning to.

Originally Posted by sdcantrell56

Getting creative with the frame helps a lot

What do you mean, exactly...?

[ttldomination]

We, team 1261, have a couple of ideas in the mills. They are both 10WD, but not all 10 wheels can necessarily touch the ground at the same time. They are primarily to insure that we clear the bump.

Although now that I think about it..one of the 10WD designs has a potentially crippling flaw...

[Kage]

Originally Posted by ebarker

so what you are saying is you can do this within 1 / 1000 of an inch ?

do what? climb the ramp?
no, I do not plan on designing that little tolerance...
this is just a theoretical angle based on exact numbers.

there are too many variables to call it that close. As it stands right now, our bot has about 1 and 1/2 inches of clearance over the top of the bump...

[ebarker]

Originally Posted by Kage

no, I do not plan on designing that little tolerance...

sorry about that.. I was just being a wise guy.

If you specify something to to that many decimals that implies your working precision. When you go to college and start your lab work you have to learn to be careful with them newfangled calculators and things or you will hear about it from your prof.

In this exercise I'd say "near bout couple of dozen degrees, give or take a smidgen".

[Kage]

my calculator goes to like 15 digits :|
and it also gives simplified radical answers... like if I do (sin 75) it gives me (√6 + √2)∕4 lol...my calculus teacher made me disable that function

I do plan on having precision, just not that much lol...
Im hoping we can get our fame up and designed before the end of next thursday...
then we can accomodate everyone elses mechanisms, and we can get it built...last year, we didnt have a working frame till week 5