outrunner have lightweight and high torque ... smooth acceleration ...
500 class green outerunner kv1700
http://bbs.rc-evo.com/forum.php?mod=...&fromuid=31523
700 class outrunner kv500
http://bbs.rc-evo.com/forum.php?mod=...ead&tid=183056
700 class outerrunner kv600
http://bbs.rc-evo.com/forum.php?mod=...ead&tid=174013