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Universal joint placement

For a pivot point wherever possible it is best to use a Universal Joint (often found on the steering and tailshaft of rear wheel drive cars) rather than a Constant Velocity Joint (often found in independent suspension and front wheel drive cars), or DIY rod end based joint, as both may allow unwanted lateral twist. If you do use a CV or DIY rod end based joint then consider a cross brace with heim joint ends between the top and bottom frame to prevent unwanted torsional twist.

The Universal Joint should be placed as close as possible to the actual base plate of the seat. You also need to balance the rig to determine where it bolts to the seat base, find out how to do so here: http://www.xsimulator.net/community/faq/find-the-center-of-gravity-to-balance-a-motion-simulator.55/

unibase.jpg

As @SeatTime explains the proper placement of the Universal joint best simulates a race car, as detailed in this image:

[​IMG]
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Category:
Design Considerations & Resources
Published:
Apr 8, 2015
Page Views:
3147