Another newbie prop question. Balancing
 

Hey, another question about props.... How important is it to balance propellers? And is this primarily done with wooden ones, or do all propellers require it?

Another question, I have a Hobbistar 60, and in the manufacturers documentation it tells where the center of gravity should be to balance it, but I also have an older Global Cessna, and am not sure where to balance this one. My question is, is there a general rule of thumb for balancing planes? Or is each one pretty unique in that?

Thanks, Caleb

RE: Another newbie prop question. Balancing
 

calebep, it's VERY important. An unbalanced prop can literally shake your plane apart, cause electronic failure, and ruin the engine itself.

All props should be checked, but the composite ones seldom need balancing. With either composite or wood props, here's my method:

Use your favorite balancer (I like the Dubro teeter balancer for small props) to determine the light blade. Spray a little clear poly-u on the front side of the blade until the prop hangs level. You can also spray the back of the light blade if necessary. Let dry and you're done.

CAUTION: If the prop swings down slowly and/or gently bumps the table, it's ok to balance. If it slams down or drops quickly, take it back where you bought it and exchange it.

I DO NOT recommend sanding a wooden prop to balance it. NEVER sand a composite prop. You can, however, use find sandpaper or a blade to scrape off a sharp leading or trailing edge. NEVER cut the blade length to balance it.

Dr.1

RE: Another newbie prop question. Balancing
 

I use clear nail polish on the back side of the light end to balance it. If you get too much just use acetone or nail polish remover to take some off. Works good. DR1's right...the composites are usually close enough.

WCB