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Keep in mind the previous comment comes from the team leader of 229. Who's bot at this point has a set of wings that deflect a bot trying to push it. They have video of just the wing and a bot drives right up it until it gets hung up at the top. Its simply beautiful. After you see the video you'll understand why he said it will be hard to unseat rampdoms, at least his.
GregT: I don't see how its an unfavorable angle, As the bot comes up the ramp at a 14degree angle it can't push completely laterally whcih means some energy goes into an upward force. How a stacker is going to gain 40 lbs from carrying crates is beyond me, unless they hold 8 of them in a nice stack. But those 40lbs would be a few feet in the air, raising there CG. A slight bump from the rampdom would send it tumbling down the ramp. As for your generaliztions about tankdrives some of it is true but then there are teams like 45 that have tank drives that will excede the majority of wheel drives out there. As for matches without stacks, from all I've heard about scrimmages the tallest stack is a 4 human stack. Finally it seems people are under the assumption HDPE is slippery but there a materials that have VERY high COF on it, some 2 to 3 times the numbers John gave.
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