Robert Moore wrote:

As a Naval Aviator, I flew the Lockheed P-3 Orion on 10-12 hour
patrols. After about 2 hours, we shut-down (feathered) the number
one engine and after 2-3 more hours, off went number four for the
remainder of the flight.

Why? I was thinking perhaps "for fuel economy", but then why wait?

- Andrew