Originally Posted by
Big Pistons Forever
After that I would randomly cover the engine instruments with my hand and ask the student to tell where the needles were sitting. "in the green" was not a satisfactory response.
Interesting. How stable would you expect the oil pressure to be? I recall pulling back the revs to around 1,500 as I started the descent and on checking I saw the oil pressure at the very bottom of the green; a needle's width inside. I pointed this out and the instructor said it was because the engine revs were low. Indeed, flying with this a/c since then I see that the oil pressure is closely linked to engine revs, always within the green, but only just at the low end.