The Bulldozers: Each of the bulldozers were unique, and solidly
represented the builder who brought it.
Bryan's dozer was able to detect opponents (and
sometimes builders) using an ultra-sonic distance sensor and would
slam a huge LEGO wheel down on them. When the weapon was activated,
it would crash into the opposing dozer, sending pieces flying and
sometimes snapping the opponent's treads. The dozer's weakness was
it's slow searching speed.
Brian's dozer was a classic sumo robot. It was
very solid and was able to detect the edge of the ring, and stay in,
using a light sensor that was well hidden behind the front grill.
While most others were trying to detect opponents, this one simply
tried to keep moving, and stay in the ring. It's weakness was it's
inability to detect the opponent.
John's dozer had a beautifully created rear
attachment. It would snap on, in place of the standard rear
attachment, and looked as if it was designed to be part of the
original kit. The attachment was a spinning wheel, which looked like
it could tear through both the opponent, and the sumo ring. The
weakness was that it used the stock drive train for the rear
assembly, so it had very actual little power.
Steve's dozer was nothing more than the stock
dozer, with an NXT hanging on the back, and two ultrasonic sensors
on the front. The programming was done the morning of the event, and
once the program was tweaked, it worked very well. The weakness was
the fact that the ultrasonic sensor threshold was too high for the
first part of the event, so it was detecting objects outside the
sumo ring, and trying to attack them.
Jay's robot was not exactly the stock dozer. It
appeared he did use several of the pieces from the bulldozer set,
but the robot bared little resemblance to the actual bulldozer.
While it did look kind of cool, in the end it's weakness was a total
lack of programming.