Re: U-joint/drive shaft alignment and trig functions

[Marco S Hyman <marc@xxxxxxxxx>]

Rod Neff writes:
 >  Its not easily apparent, but if the yolks attached to both ends of the
 > drive shaft are aligned, the u-joints are 90 degrees out of phase. I want to

That is counter intuitive.   I'd think that if the yokes are  shown as
the second diagram at http://www.4xshaft.com/driveline101.html they'd be
in phase, no?   This is implied by
http://www.borgeson.com/U-JointOrientation.htm
which says:

   When two joints are used on a shaft, the forks of the yokes closest to
   each other should be in line, or "in phase". 

// marc

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