Originally Posted by
tdracer
I thought I posted this earlier, but it didn't show up so I'll risk repeating myself.
The bottom line is that running at/near idle for a few minutes then shutting down for 90 minutes does not meet the requirements for having a 'warm' engine. Perform a minimum of a five minute warmup.
Setting takeoff power on an engine that isn't thermally stable is hard on the engine. The impact can be anything from a tip seal rub (permanent performance loss) to in extreme cases it can cause an engine surge.
Saving a couple of gallons of fuel by not doing a proper warmup will be quickly swamped by even a small increase in engine fuel burn until the next overhaul.
Yea but what do you know? You're not a beancounter
Thanks as always for your insightful contribution.
I've flown with people who must pride themselves in applying takeoff thrust and shutting down the engine right at the limits. Never understood it.