Sit-and-spin

The Sit-and-spin design was the former of the two thwackbot designs to appear in Robot Wars. They work under the same principle as a Full body spinner - a heavy spinning object that makes contact over a small surface area.

Definition

 * A Sit-and-Spin refers to any robot whose only means of attack is to spin on its own axis. Most sit-and-spin robots consisted of an arm with a sharp or blunt weapon on the end, but others featured a round body with spikes or blades around the sides.

Meltybrain
Sit and spins waned in popularity as more advanced weapons took to the stage. Recently though, a builder in the US discovered a way to allow Sit-and-Spins to move and spin at the same time. Dubbed "Meltybrain" technology, it involves equipping a Sit-and-Spin robot with LED's and a detection system, allowing it to automatically figure out its position at any given moment.

Advantages and Disadvantages
Advantages
 * Since the sit-and-spin design works under the same principles as a Full Body Spinner, in theory it should be just as devastating in effect. A notably potent sit-and-spin robot is first Dutch Robot Wars runner-up Lizzard, who used its tail to severely damage Neater's lifting forks in the Heat Final of the second series.
 * The sit-and-spin design provides a great degree of protection from attacks such as ramming, as it will often deflect the opponent upon contact with them. This was best shown in the Trial of Series 2 Heat E, as Matilda was unable to build up an effective charge in order to push Spin Doctor off the King of the Castle platform.

Disadvantages
 * While it is potent, a sit-and-spin cannot move and attack at the same time; to attack it must spin on the spot.
 * Spinning in place is not considered to be aggressive behavior, a fact that the judges will note if a match winner is to be chosen based on points.
 * In addition, if its wheel or drive becomes damaged, not only will its locomotion be crippled, but its weapon will too, since a Sit-and-Spin uses its drive system to attack.
 * Sit-and-spin robots were ineligible for the Seventh Wars, due to the moving weapons rule. However, controversy struck when T-Wrecks managed to qualify regardless.

List of Sit-and-Spin Robots
Robots are listed alphabetically. Robots that aren't heavyweight are listed with a green background.