8.1
-Example 4: It is determined that a 50-pound weight placed 15º from rotor arm No. 1 (at 0º) will balance a rotor. However, the closest locations for installing weights are at 0º and 60º (rotor arm No. 2). Therefore, two weights must be installed at 0º and 60º that will have the resultant effect of a 50-pound weight at 15º.
8.2
- The 50-pound weight at 15º is scaled as the vector OE (fig. 7). To reduce OE into a pair of vectors located at 0º and 60º (fig. 7) construct a parallelogram with sides at 0º and 60º and OE as the diagonal at 15º. Beginning at the head of given vector OE, draw a line parallel to the 0º line
5