correct angle for a drive shaft with 2 joints

[SnoC653]

That's my point. The angle on the drive shaft is set in stone, unless he moves something.
What was the point of saying his v drive might lean forward 2*. How would he go about changing that. By relocating the strut or changing the prop shaft angle? By changing the v drive angle to an 8* from a 10? or a 10* from a 12 which ever the case may be?

From the time I started rigging my boat, until I was setting the engine and making plates, I never gave a thought to the drive shaft or u joint angles. Why would I?
It the boat isn't currently rigged, then you just rig it. Period. Worry about the drive shaft and U joints angle when you get there.

Curious. You say the strut isn't set. Is the shaft hole plugged? Or is he willing to fill it if he moves the strut or angle?
If the hole is filled, you know why nobody asks where the hole goes? Yep, it goes where the shaft would hit the boat. Drive shaft angle is pretty much the same.
U joint angle is a little different, but you deal with that when you get there.


OR ..... as I asked, is he considering rigging this boat around a drive shaft angle and that's why the question is being ask.

He has said before that his strut is a 10* and his Vdrive is a 12*. If he changes to a 7 or 8* strut, that would put his Rewarders pointed almost up at the sky unless he changed Vdrives too.

It always amazes me when someone gets a boat to work and then they take it apart and don't record where everything was at before hand. Hopefully, he measured the angles of the prop shaft and driveshaft before he took it all apart. It is possible that his 10* strut was sitting at 9 or maybe 8.5* depending on how they had it sitting. In one of his other posts he said he had this one taking a good set finally. If so, that is where he should put everything back, unless he is planning on buying some new hardware (strut, v-drive, engine plates, possibly a shaft log).

[gn7]

He has said before that his strut is a 10* and his Vdrive is a 12*. If he changes to a 7 or 8* strut, that would put his Rewarders pointed almost up at the sky unless he changed Vdrives too.

It always amazes me when someone gets a boat to work and then they take it apart and don't record where everything was at before hand. Hopefully, he measured the angles of the prop shaft and driveshaft before he took it all apart. It is possible that his 10* strut was sitting at 9 or maybe 8.5* depending on how they had it sitting. In one of his other posts he said he had this one taking a good set finally. If so, that is where he should put everything back, unless he is planning on buying some new hardware (strut, v-drive, engine plates, possibly a shaft log).

Unless its a drop thru strut, I doubt the angle was changed much from what it is simply bolted to the hull. Even with a drop thru, If he reinstalls it with the same holes drilled in the strut and mounting angles, its not going to change much.
If he put the strut back in the same place, All the angle figuring is done. Now its just a matter of putting the boat back together.

[SnoC653]

Unless its a drop thru strut, I doubt the angle was changed much from what it is simply bolted to the hull. Even with a drop thru, If he reinstalls it with the same holes drilled in the strut and mounting angles, its not going to change much.
If he put the strut back in the same place, All the angle figuring is done. Now its just a matter of putting the boat back together.

I agree as long as they didn't do any filling on the bottom of the boat where the strut was located. I know on the Guasti, it had a 9* bronze strut. The bottom of the boat was ground down and when the strut was bolted to it, it sat at 8.25*. When I put the steel strut on it, I intend to have it sit at the same angle with the back of the barrel in the same location. The boat was rigged as a SBC boat before so I'll start back with what worked all those years ago. And before anything got filled, sanded, or touched, every piece of hardware was bolted back into the boat to make sure where it was originally located and at what angles.

[ogshotgun]

no work on the bottom other than a little cosmetic..

[ogshotgun]

He has said before that his strut is a 10* and his Vdrive is a 12*. If he changes to a 7 or 8* strut, that would put his Rewarders pointed almost up at the sky unless he changed Vdrives too.

It always amazes me when someone gets a boat to work and then they take it apart and don't record where everything was at before hand. Hopefully, he measured the angles of the prop shaft and driveshaft before he took it all apart. It is possible that his 10* strut was sitting at 9 or maybe 8.5* depending on how they had it sitting. In one of his other posts he said he had this one taking a good set finally. If so, that is where he should put everything back, unless he is planning on buying some new hardware (strut, v-drive, engine plates, possibly a shaft log).

the question was what angle should the u joints be ? , nothing has changed and yes i know exactly where every bolt was located and have templates .