Manual trim is hardly ever used - it means getting the handles out and winding the bl**dy thing (and the handles will have your leg off if you're not careful). I have used it in testing and following failure, but I'm in the minority.
Auto-trim is to do with ensuring that the pitch force per G meets certification requirements especially in the climb after take-off, and is not under the pilot's control at all.
Electric trim, using the pickle switch on the control wheel, is the normal trimming mode.
Either way, I'm afraid that 'how many revolutions' is firmly in anorak territory for me, but doubtless someone with time on their hands will be along.
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Hmmm, well.
criticism from real-life pilots is especially welcome
Glad to oblige.
