In an epicyclic gear train shown in Fig. 15.47 the internal wheels (A) and (F) and compound

Question:

In an epicyclic gear train shown in Fig. 15.47 the internal wheels $A$ and $F$ and compound wheel $C-D$ rotate about the axis $O$. The wheel $B$ and $E$ rotate on pins fixed to arm $L$. The wheels have the same module and number of teeth are: $Z_{b}=Z_{e}=20, Z_{c}=30$, and $Z_{d}=28$. If arm $L$ makes $200 \mathrm{rpm} \mathrm{cw}$, find the speed of $F$, when

(a) wheel $A$ is fixed, and

(b) wheel a makes $20 \mathrm{rpm} \mathrm{ccw}$.

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