Here is a 2012 Pilatus PC-12 turboprop, N367AF, during startup on the ramp at Princeton Airport (39N) in Princeton, NJ followed by taxi to the runway for departure. The airplane took off a few minutes later & I just can’t get enough of that Pratt & Whitney PT6A engine on this aircraft when it ignites. What a sound! Music to my ears! Apologies for the shakiness.
Startup Time: 6:49 PM