[EricH]

Originally Posted by JesseK

Last year 1885 did a 6WD rocker with 4" wheels. It is my opinion that we turned "too well", and the center of rotation kept changing from one side of the bot to the other. This proved to be detrimental with sudden shifts in speed and direction, as we could very easily tip if we did the incorrect sequence of movements. We tried to limit max turn speed via the gyro but that went south pretty quickly as it was a last-minute "feature".

Sounds like a weight distribution issue to me. Was your CG right over the center wheels? If so, you would have had a two-wheel drive robot (effectively) with a chance that any loose weight (tubes and the like) could easily shift during a match and slow one wheel down more than the other.

330 has only tipped twice using their 6-wheel rocker (6" wheels), and one of those was due to tangling with another robot high up (and we still pulled them across half the field. The other was due to being on a ramp in 2006 and going down the "wrong" way by mistake. No tips at all in 2007, other than being on a partner's ramp and sliding off for whatever reason. (And who didn't do that?)