F IGURE 3. Typical harness section.
erances specified in the model specification.
shank end of the blade in such a manner that it
Other means shall be subject to approval by the
will not be detrimental to the strength of the
blade. The balancing material placed within
procuring activity, as shown in figure 4.
the hole shall be adequately secured.
3.31.2 Hub. The rotation of the hub caused
3 . 3 1 . 1 . 2 Wood. Final balance of wood
by out-of-balance shall be stopped or reversed
blades shall be attained by the removal of ma-
by an opposite moment determined as the
terial not to exceed the minimum allowable tol-
weight of the hub times an eccentricity of 0.0005