Quote:
Originally Posted by sdcantrell56
Do you know how to search for information on the internet? Maybe a quick look at colsons website would reveal wheels in sizes from 1.625" to 8" diameter and widths from 7/8" to 2".
Searching just a pinch further would reveal a hub that will do exactly what you seem to need without requiring any machining. http://wcproducts.net/wcp-00052/
Even a pinch more searching....granted not much more would reveal that the weight difference between pneumatic wheels and colsons would be very close to negligible as well. |
I will refer you to my original post, in which I am searching for hard data, because AM's website lists an inaccurate diameter for 8" diameter wheels. I assumed the implication that I'm not trusting websites at the moment was obvious. I do apologize and will state things more plainly next time for you.
Also, my google-fu indicates an 8"x1.5" sprocket & bearing ready Colson weighs in at 28 oz. Based on AM's weight specs (which I trust a bit more than the size) a sprocket & bearing ready AM pneumatic weighs in at 18 oz. So alright, it only costs me 3.75 lbs. This still doesn't help me.
EDIT: On the other hand, you're coming to Lone Star... So bring me a bag of six 8" Colsons ready to go and prove me wrong. I dare ya.
EricH,
Some of my compatriots have suggested similar solutions, which is why I'm hunting up data on wheel sizes. Another mentor swears he measured them at 7.75", I measured one at Bayou at 7.5". To my horror, we're probably both right. At any rate, we're down to considering opportunity costs of our different options. We're running in a kit frame, so if I could just swap in 8" wheels on the front, life would be bliss. Or 8" wheels on front and back. I readily admit I like the grip those pneumatics have on carpet and bridge, and if they were actually 200mm, I'd go ahead with no worries. But if they're 7.5", then I'm obviously hosed. I'd much rather swap all the wheels and get back to a known solution than swap a pair, curse my luck, swap another pair....
Yes, 6" wheels with appropriate gearing and spacing could work, but that's even more time than a drop-in 8" replacement. Plus, our CG it biased somewhat back normally, but shifts more forward with the wedge down, and will shift radically forward if we ever get a robot on top of us.
All in all, I'm gunshy facing our second and last regional. I know we can get a standard 6WD running right. I don't have enough info on the actual size of our pneumatics to make me confident in a half-way approach. Yes, not knowing the actual size of the wheels on your robot is silly, but it was a really long regional, and it didn't matter outside this context.