Editing Robot-sumo (section)

=== Mega Sumo ===
Mega Sumo or Sumo 3kg class, also called Standard Class, or simply Robot-Sumo, is the original class created by FUJISOFT. It is currently the most important class and considered the main event of robot sumo competitions.
[[File:|thumb|350x350px|A clash between Mega Sumo Auto 獅子奮迅, from Japan (in the left) and Galena, from ThundeRatz <small>[<nowiki/>[[:pt:ThundeRatz|pt]]<nowiki>]</nowiki></small>, Brazil (in the right) at the All Japan Robot-Sumo Tournament 2024. Magnets allow robots to move at high speed with high precision and power.]]
In this class, robots are limited in weight to 3 kg and in dimensions to 20 cm x 20 cm, with no height limit. Once the fight starts, the robot is allowed to expand its dimensions.<ref name=":4">{{Cite web |title=試合のルール｜全日本ロボット相撲大会 - ALL JAPAN ROBOT-SUMO TOURNAMENT |url=https://www.fsi.co.jp/sumo/rule/index.html#page2 |access-date=2024-12-31 |website=www.fsi.co.jp}}</ref>

In this class, the dohyō should ideally be a 5cm in height circular aluminum structure with a diameter of 154 cm (+/- 50 mm), including the border line, and covered by a black cold-rolled steel (SPCC) sheet located on top.<ref name=":4" /> The dohyō is made of steel, and the use of [[Magnet|magnets]] is allowed to increase the interaction force between the robot and the arena. Because of this, many robots can achieve normal force values that surpass 100 kgf.<ref name=":9">{{Cite web |title=ThundeRatz {{!}} Stonehenge |url=https://thunderatz.org/projects/robots/stonehenge |access-date=2024-12-31 |website=thunderatz.org}}</ref>

This class is usually divided in Mega Sumo Auto (Autonomous) and Mega Sumo RC (Radio-controlled).<ref name=":4" />