Double Cardan or Wide Angle?

DiscoClay

Well-known member
Mar 18, 2021
451
90
Chapel Hill, North Carolina, USA
Have any of you seen a failed double cardin stock D2 shaft? I am wondering about the failure mode.

It seems that if the forward-most u-joint in the DC fails then the H-section [the "main" double-cardan component] would try to fling [~pivot 90° from its operating angle] centrifugally outward.. causing UFIO syndrome [Unstoppable Force -- Immovable Object] with anything it encounters [anything, in this case, being an aluminum gearbox].
 

kris812

Well-known member
Jun 11, 2014
323
119
Tucson AZ
Scroll down some, you'll see what we talk about..

 

DiscoClay

Well-known member
Mar 18, 2021
451
90
Chapel Hill, North Carolina, USA
Wow, that is about what I was thinking.


It seems that could be eliminated by placing the DC forward, on the axle end. I know this would mean more mass out there but.. so what :p. Separately, a flat steel plate could be installed as a guard next to the tranny. Of course keeping the joints lubed would solve most of this problem. :)

Anyways... Got it: no cheapo sweaters up near the wagon's dangly bits!