Motion Simulator build and test flight

hi and welcome to the Sim which obviously isn't here uh at the moment the reason for it not being here is that I'm building this a two of motion platform for the simulator my goal for this video is to assemble the cockpit on the motion platform but before we start assembly I need to address some issues with the motion system so let me start by showing you how the motion system works under under the center of the base uh there is a universal joint that carries most of the simulator weight and restricts the motion into pitch and roll then you have the activators that are responsible for moving the base the problem I'm having is that the universal joint is not rigid to torsional loads making it rotate and oscillate around the U axis to figure out why this is the case I did a little digging and this is what I found as you can see the whole U joint is flexing making the whole universal joint uh rotate having established where the problem is I have uh designed a new universal joint running stress analysis on this new parts uh show Improvement and hopefully this will be rigid enough there will of course always be some flex but it would be nice to reduce it uh to some acceptable level and here are the finished Parts after 300 hours of printing and 4 and 1/2 kg of ptg let's get the old universal joint out uh so we can swap over the cross bearing and install the new one [Music] [Music]