Am I putting too much thought into this.
14BFF with double cardan joint at the TC.

Through searching and reading I've found that I want my pinion perpendicular to the drive line at cruise but I can't find any methods for doing it. I have to put the axle in place to measure the distance from the pinion to the TC output. Then when my drive shaft shows up from Tom, I install and fine tune the angle. But, wont the angle change when the torque is applied. What method is there for anticipating the twist in the axle when cruise torque is applied?

Am I putting too much thought into this. I'm sure I'm over my head. Luckily, if the entire project is a failure, I've got a dependable bicycle.

at cruise not much power is being applied.

and i thought with a cv you wanted the pinion pointed at the output yoke?



using a angle finder from your local hard ware store, place you out put and pinion yoke in the 90* vertical position and the anlge finder on the yoke. rotate till you are with in 1-2* +/- each other.

...Through searching and reading I've found that I want my pinion perpendicular to the drive line at cruise...

I've never seen a u-joint capable of operating at 90°. :flipoff2:

I do want it pointed at the yoke but I'm maintaining the slip yoke so is going to be a few inches aft of the output. If you are saying the axle isn't going to twist with cruise torque applied then this whole thing will be pretty easy. The method you showed with the angle finders sounds like what you do with a single cardan U-joint set up because of the varying velocity shaft.

Set the angle just under aligned with the drive shaft. That way when under torque it rises to be more aligned...

Set the angle just under aligned with the drive shaft. That way when under torque it rises to be more aligned...

Bingo!!

Sounds easy enough. I guess its not as exact a science as I suspected. Thanks for the help.

I do want it pointed at the yoke but I'm maintaining the slip yoke so is going to be a few inches aft of the output. If you are saying the axle isn't going to twist with cruise torque applied then this whole thing will be pretty easy. The method you showed with the angle finders sounds like what you do with a single cardan U-joint set up because of the varying velocity shaft.

i didnt say that the axle doesnt twist when torque is applide, i said that at cruising you arent makeing much torque, there isnt much load on the motor or the drive train, ther is some but not much. when you luanch off the line and stomp th eskinny to pass somebody yes it will twist. but at CRUISE its at minimal load and twist.

I'm pick'n up what you're lay'n down. I think the idea is to have it pinion aligned with the shaft for the majority of the time.