Announcement

Collapse
No announcement yet.

Prop clocking

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • #16
    Re: Prop clocking

    Review these. If there's access to a prop balancer that generates a plot of vibes vs rpm then it would be interesting to note any real measured changes or benefits by re-indexing. The rough start-up mentioned will be worth looking for:

    https://groups.google.com/forum/#!to...lt/5vp2oGDiEKE
    https://www.lycoming.com/sites/defau...20Location.pdf

    Gary
    N36007 1941 BF12-65 STC'd as BC12D-4-85

    Comment


    • #17
      Re: Prop clocking

      I have propped a Comanche set at 9/3 and it sucked, put it at 11 and he done with it, you may have to prop and it's the safest position to start from. Tim
      N29787
      '41 BC12-65

      Comment


      • #18
        Re: Prop clocking

        Ok, you know it's been a while when you forget your password and need to request a reset...

        So I've been flying the prop clocked at every available angle and the 11'oclock is the best. The 9-3 made it buzz (slight roughness) at most rpms over 2k, the current position with the prop at 11'oclock but with the #1 blade pointing down (180 deg out) seems to be the best for my current set up. I know these Lyc's are not sewing machines, and certainly not paint shakers, but if I ever rebuild one I'm going to balance everything. I thought for sure the 9-3 position was it, but I guess the precession forces have better ideas and Lycoming was right.

        Comment


        • #19
          Re: Prop clocking

          Originally posted by SpecialT View Post
          Ok, you know it's been a while when you forget your password and need to request a reset...

          So I've been flying the prop clocked at every available angle and the 11'oclock is the best. The 9-3 made it buzz (slight roughness) at most rpms over 2k, the current position with the prop at 11'oclock but with the #1 blade pointing down (180 deg out) seems to be the best for my current set up. I know these Lyc's are not sewing machines, and certainly not paint shakers, but if I ever rebuild one I'm going to balance everything. I thought for sure the 9-3 position was it, but I guess the precession forces have better ideas and Lycoming was right.
          Yep, what I said earlier...11:00
          N29787
          '41 BC12-65

          Comment

          Working...
          X