Fuel Vents... UNOBSTRUCTED. It's a common step on an airplane's
Preflight Inspection checklist. But what are you really looking
for? Why is it so important to check fuel vents for
obstruction?
The FAA Aircraft History Project documents the aircraft used by the
FAA and its earlier incarnations. Not much in the way of
photographs... but lots of aircraft lists starting from "N" number
1.
"CONSTANT PEG afforded pilots an opportunity to learn how to
fight enemy aircraft in a controlled, safe environment without
having to endure the risks of actual air combat. Typically a pilot
would start with a basic familiarization flight to observe the
enemy airplane and study its characteristics, practicing one-on-one
defensive and offensive maneuvers against it, and finally,
experience multi-bogey engagements high over the desert scrubland
of the Nellis Air Force Base ranges."
Source: Brig. Gen. Hawk Carlisle, 3rd Wing
commander at Elmendorf Air Force Base, AK and a former member of
the 4477th Test and Evaluation Squadron.