Driveshaft operating angles

[mike_belben]

Ive done a bunch of typing several times explaining this to help people fab or troubleshoot equipment driveline issues.  Figured id share this vid that got suggested to me just now.  First time ive seen it illustrated this way.

Drive shaft velocity - YouTube

[donbj]

Very interesting and informative. Very well done video.

[moodnacreek]

Great video. I remember reading about this when I was a kid in Hot Rod magazine.  Think what a conventional 4x4 does while making a turn.

[trimguy]

Very interesting. I Learned something again today. Thanks Mike.

[Gere Flewelling]

Years ago I worked at a fire truck manufacturer installing Hale, Waterous, and Darley pumps in new truck chassis.  The pump directions always dictated that the pump had to be mounted in the frame at the same angle as the engine and transmission angle to control vibration.  I thought I was smart enough to know why, but this video explaining and showing the changing yoke speeds explains the real reason a vibration would occur.  And I thought I wasn't going to learn anything new today!
Thank you for showing this.  GF

[moodnacreek]

My old log truck has 4 drive shafts. It once had a growling at 45 mph that was in the drive shafts. The man who fixed it showed me the formula. It started with the crankshaft angle and when it got to the 2nd half of the 2 piece between the aux. trans and the first rear it had to have a steep angle the looked all wrong but it fixed it. Funny thing is that they say a straight driveshaft has a short U joint life. 

[mike_belben]

Definitely true... When you have a straight at one end and an angle at the other.  If thats the case you need a double cardan at the bent end. 


In single cardans you need both joints straight or both equally bent.