$(4\mathrm{.}6$ PLZZZZ$)(4\mathrm{.}6)$ Design a Lapple standard cyclone to function as a precleaner. The particles have a

density of $1250k\frac{g}{m^3},$ and have the same size distribution as in Problem $4\mathrm{.}4,$ but the air

is at $150F$ and $1$ atm $,$ and is flowing at $2000$ acfm. The cyclone need be only $65-75\%$

efficient. Specify your final choice of body diameter and the corresponding efficiency.