True, I had forgoten about that (parallel in/out shafts)

But does that mean a tractor or four wheel drive suffer from alternating
velocities on the front wheels when cornering?

Cam

"Dave Jackson" wrote in message
news:Cynxc.674680$Pk3.470737@pd7tw1no...
Cam

Two universals will only provide a constant velocity on the output shaft
if
the axes of the input and output shafts are parallel. For instance, when
these two shafts are parallel but not aligned, the first universal will
put
a varying velocity into the connecting 'shaft' and the second universal
will
remove this varying velocity.

I think that the hub and shaft axes on the V-22 are not always aligned and
therefore a double universal joint will not provide constant velocity.

Dave J