Grounded27
I have allways been a firm believer when testing an engine to advance quickly up to where you think 80%n1 might be the set power from there. Better an engine stall before 80kts than when you need the motor and firewall it st save your arse.
Not a good idea to test out the stall margin of an engine with passengers aboard. Best to let the engineers do that against a company approved program. Engines have a tendancy to wear out quicker (lose stall margin) with rough handling