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Buckaroo

Went from static WOT 5000 to 5170 with this!

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Well today I finally got with my prop balancer dude who put some mojo on my rig! After warming her up to 122 my guy attached the necessary stuff to measure a true prop balance. My wide open static rpm was right at 5000 rpm at 3880 msl.  To make a long story short we added 30 grams of weight to the problematic one of six prop bolts. After a re-start I full throttled her to max and by golly my static rpm increase was 5170 or 170 rpm. Impressed I did a test flight and sure enough she was much more refined and smooth feeling. 

The weights added on one stud of six was 3 weights at 10 grams each. 

This has smoothed my ride out immensely!  

Get a prop balance ASAP! 

 

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How are the weights attached?  Are they weighted washers?  When Lockwood balanced my prop they put the weight on the inside lip of the spinner back plate.  I noticed much smoother operation, but no rpm change.

Do you have a picture of the weights?  I'm curious.  

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We all have six prop hub bolts. Picture the bad side hub bolt fixed with three ring washers on one of the six bolts weighting 10 grams each. As a final top off he affixed a very small washer on an the hub bolt to make the rotation perfect. 

Wow these plastic prop companies obviously don’t balance there stuff! I’m thinking in their minds they think these little toy props can get by without the attention to detail! Wrong!!

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My understanding is most airplanes don't come from the factory with a good dynamic balance.  Most are static balanced and called good I think.

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Yes it’s a shame as it’s like mounting unbalanced tires on a vehicle. 

If you can try to get that done mine was out .4 which anything over .2 can be problematic.

 

 

 

 

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1 hour ago, Buckaroo said:

Yes it’s a shame as it’s like mounting unbalanced tires on a vehicle. 

If you can try to get that done mine was out .4 which anything over .2 can be problematic.

 

 

 

 

Mine was 0.3, after balance was 0.05.

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49 minutes ago, Buckaroo said:

Feel the difference?

Oh yeah.  Before the balance I would watch the Mushroom shake slightly.  Now it's smoooth.

 

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I read that most prop manufacturers don’t balance their props. That’s like mounting new tires without balancing. 

After how mine feels now I want to scream out to everyone to at least have yours checked. Mine was a number of 4 before balance and .05 after balance. The difference was amazing. 

 

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