AAK

Sorry for not being specific. I mean like the following: http://en.wikipedia.org/wiki/Image:Ka-226.jpg http://www.barnstormers.com/EVENTS/020907/033.jpg

How well do helicopters with two sets of blades rotating in opposite directions work? I know they are supposed to be ideal, but don't the mechanics reduce the effeciency?

What I did last year with the same goal in mind as you, was install apache on my home computer (more specifically PHP Triad which included apache and some other useful things), and installed a CGI-Proxy ( http://www.jmarshall.com/tools/cgiproxy/ ). Everything worked perfectly.