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prop balancing

Discussion in 'General Discussion' started by scole, Mar 24, 2014.

  1. scole

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    I keep seeing videos on balancing props and they say to sand the back of the heavier prop, that seems like your going to effect the profile of the blade. shouldn't you take some off the end (tip)?
     
  2. Ozzyguy

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    I use pieces of tape over the leading edge if the lighter blade to balance
     
  3. OI Photography

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    I'd say the exact opposite is true...removing material from the tip of the blade would have an effect on the performance of the blade more so than if you took some off the back of the thicker part.

    Either way, tape is the easier option that I use more often now. Just put a small piece or two on the back of the lighter blade, and then move it/them towards or away from the hub to dial in the balance just right.
     
  4. ElGuano

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    I sand the bottom of the blade. I'd put the tape there too if I used tape.
     
  5. OI Photography

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    How 'bout them apples. I always thought that's where any changes to the blade profile would have the most impact (on the "push" side). :eek:
     
  6. Mofroggy

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    I put as piece of clear tape on the back side of the heavy end. I purposely put too much on, trying to get the most tape towards the center. Then I check it again and if it is now heavy on the taped end I take an Xacto blade and trim off small increments of tape until I get it exact. I save some of the pieces I cut in case I go to far on the trimming. If I cut too much I just add back a small piece of what I cut off about the middle of what is left. I have over 100 planes in my "hanger" and I have balanced a lot of props and I can get a prop balanced in about 3 minutes at the most. For what it is worth I think the magnetic prop balancers are the most accurate because they have nearly "0" friction. Having said that the Dubro is a really good balancer too.
     
  7. ElGuano

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    I'm probably wrong about that, I haven't put much thought into which side is better. But my assumption was it would be easier to increase the turbulence on the low pressure face....I'm sure this is a mech-e 101 final exam question with a definitive answer.

    I also figure tape strips affect aerodynamics more than sanding, I sand the entire face so it's taking off an extremely thin layer of clear coat and carbon fiber.
     
  8. OI Photography

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    Gotcha. I used to sand, and when I did that's how I did it...but I tried tape once and the net result seemed to be the same, so Easier:1/Better:0
     
  9. ElGuano

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    I'm going to try out the iPhone vibration app method to balance motors and props next time. Tape is the only way to go for that method.
     
  10. OI Photography

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    Google tells me that has nothing to do with birth control, and everything to do with another project I'll let you do first and wait till I hear the results :D
     
  11. LuvMyTJ

    LuvMyTJ ADMINISTRATOR
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    I sand them. It is such a small amount you barely even see dust. We're talking micro particles. No issues. I used to tape till I noticed some came off on my 525 quad one time. Been sanding ever since.
     
  12. DesertFlyer53

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    Shouldn't the tape go on the light end???
     
  13. DesertFlyer53

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    That would be my concern with the tape method.
     
  14. gen3benz

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    Problem I am having is centering the cone in the keyed side of the prop.
    Do you just eyeball it? Or is there a better way to center it?
    [​IMG]
     
  15. ElGuano

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    Cone pointed in at the collared end (assuming that is round) and cone pointed out (flat edge against hub) on the wider keyed end. If the uncollared end is the unkeyed side, reverse of what I said.
     
  16. gen3benz

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    Oh jeez....Yeah....that make perfect sense. **** i'm special sometimes...
     
  17. Ozzyguy

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