HOW TO BALANCE PROPELLERS
To check the balance of
the prop hub, place the
propeller vertically so that
one tip points straight up.
;e heavy side of the hub
will cause the blade to fall
toward that side.
On the lighter side of the hub, apply some
Zap glue and spritz with some kicker to
accelerate the curing of the glue.
You’ll know that your
propeller is perfectly
balanced when you can
place it in any position on the balancer
and it remains there without a prop tip
dropping. Once this is done, you can
use the prop as is, or if you like, you
can apply a couple of light-mist coats
of clear paint to both blades to seal
the surfaces and prevent moisture
from getting into the wood grain.
Once the paint dries, your prop is
ready to use.
;e same process can be used with plastic
and composite propellers, with the exception
of adding a coat of clear to seal it.
;at’s about it. I highly recommend going
through the e;ort, whenever possible, of
balancing all your propellers before flying.
And since you might accidentally damage a
prop, you should have a couple of spares (and a
balancer, of course) in your field box. ;
Your propeller will be properly
balanced when it can be placed at
any position on the balancer and it
With a wood propeller, you
can spray a light-mist coat
onto the blades to seal the
surfaces. Apply paint to
both sides of the propeller
evenly to maintain
To determine which side of the hub is heavier, place the prop so that one
blade is pointing straight up. When you release the blade, the heavy side of the hub will
cause the tip to drop to that side. To bring the hub into balance, don’t sand the heavy side
but, instead, add some weight to the lighter side.
As with the blades, it doesn’t take a lot to balance the hub. Determine the
lighter side of the hub, and while keeping the prop on the mandrel, apply a bead of glue
about an inch long to the lighter side and add some kicker accelerator. Let the glue dry
and then place the prop back on the balancer. Keep applying a bead of glue at a time and
apply the kicker until the propeller remains pointed vertically when you release it with
the tip pointing straight up.