tower vibration [RE-wrenches]

[Matt Tritt]

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Hi Kirk,

This might be a bit on the overly-pessimistic side. ;-) An ounce can 
make a huge difference, but a few grams?

On the other hand, this pretty clearly illustrates why three blades are 
better than two. I've seen three blade turbines still running smoothly 
after loosing a good portion of the tip on one of the blades - close to 
1/2 a pound of material gone. (But not recommended!)

Matt T

Kirk Herander wrote:

>Thanks for all the advice. I guess it doesn't take much for the blades
>to go out of balance -I've been told from an old timer as little as a
>few grams difference can cause a problem -  So time to remove the blades
>and check it out.
>
>Kirk Herander
>Vermont Solar Engineering
>802.863.1202
>fax 802.863-7908
>NABCEP(tm) Certified Solar PV Installer
>Xantrex Certified Dealer Charter Member
>NYSERDA-eligible installer
>VT Solar and Wind Partner
>
>
>
>
>  
>


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