Forum - Irreversible Screw From The Great Ball Contraption Wiki Special page Tools Special pages Printable version Overview > Great Ball Contraption > Customs > Irreversible Screw Write a reply [#55] <videoflash>TOMfg69vlik|560|350</videoflash> This time a variant of the Archimedes' screw type module. This one can't be reversed - balls are transported forwards regardless of rotational direction. Posted by Torso on 22 February 2016 at 23:09. Hey that's pretty neat! Does it need to go 'forwards' at least some of the time to feed balls in from the bottom? Or will it work if it goes 'backwards' the whole time? Either way, I'm impressed. Owen. Posted by Captainowie on 23 February 2016 at 08:48.It can feed in either direction. When going backwards, it will drop some of the balls back into the centre. Enough balls will make it through anyway. Posted by Torso on 23 February 2016 at 09:51.That is awesome. I also very much like the finished look of your module. Posted by 22.214.171.124 on 15 March 2016 at 17:57. To protect the wiki against automated spamming, we kindly ask you to solve the following task below and enter the answer in the box (more info): What year was the Scooby Doo theme introduced? Retrieved from "http://www.greatballcontraption.com/wiki/Special:WikiForum/Irreversible_Screw"