caps can do a range of jobs depending on where there placed and how there connected, Don't believe everything on wikipedia. Teachers put duff information on so students can't copy and paste for homework. My old teacher done that and i know of other teachers doing the same.</p>

to the op this might help with what caps do on a brushless esc.</p>

http://www.teamnovak.com/tech_info/power_caps/power_caps.htm</p>

http://www.castlecreations.com/products/cc-cap-pack.html</p>

i would avoid wikipedia for anything and try to search a site that does what your searching for, sorry for butting in buds.</p>


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