I'm open for examples on this one. Bob >> You see my point though? I know of at least one robot in RW that was actualyl powered by a pair of alternators and some trick motor controllers. A 12v alternator being driven by a phased motor controller at 24v gives a surprising power-to-weight o/p Cheers for the links Martin Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/DMCForum/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/DMCForum/join (Yahoo! ID required) <*> To change settings via email: mailto:DMCForum-digest@xxxxxxxxxxxxxxx mailto:DMCForum-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/