The question oif gascolator/filters comes up regularly.
Both the Stearman and the Hartvard/SNJ/T-6 series had both. The water drains
are at the bottom of each tank. The gascolator is at the bottom of the
engine bay - last item before the carb. It is routine to check each before
every flight - although if at a training facility, the tanks are
water-checked only after each fuelling.
The explanation given is that the water-drains check for stored water in the
tanks (over-night or whatever), whereas the gascolator is checked for every
flight should foreign material be left or incurred in the fuel system
downstream.
Anyway, thass my story. And I have both.
Ferg
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