Bravo Drive helocopter noise and rumble

krisnowicki

Lieutenant Junior Grade
Joined
Jul 11, 2007
Messages
1,172
I have a bravo drive that has driven me nuts. I had a tapping noise so I hange the coupler and it went away. I also did the ujoints and gimbal bearing. Now I have a noise when making turns and on WOt take offs. I changed the u joints agian and the same noise.

the alignment is dead on, the drive and alignment bar just fall into place.

Yesterday when changing the U joints for second time I measured the space between the yokes and the opening was 2.125 on the middle yoke and 2.25 on the shaft you and the yoke attached to the drive.

Would this cause a rumbled? What is rubbing when I hear the noise?
 
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