It's the igniters starting the engines. They are like a huge spark plug. The pilot turns them on to ignite the fuel. They turn off when the engine starts unlike a spark plug.
@@gregorygardner4431 Yup Igniters somehow PA picks up the sound of the current! Pilots can and do turn "continuous ignition" on flying thru certain weather conditions rain/snow/ice etc.otherwise it is off after engine start.
Looks like the DC-9 ceased flying in North America in 2014, if i recall correctly. Looks like MD-88s are left behind for use for the time being until their eventual retirement.
I love that DC-9 Sound. Reminds me of my first Trips to the USA with Northwest Airlines.
you may have been on that very plane
Flew on these a lot when I was in the Navy. It had it's ups and downs for sure
Did this flight in August 2013 to Atlanta from Savannah on the DC 9
I took a dc9 to Reno Nevada from STL
Ive always wondered what that sound is in the background sounding like an alarm during engine start o n all DC9s
It's the igniters starting the engines. They are like a huge spark plug. The pilot turns them on to ignite the fuel. They turn off when the engine starts unlike a spark plug.
@@gregorygardner4431 Yup Igniters somehow PA picks up the sound of the current! Pilots can and do turn "continuous ignition" on flying thru certain weather conditions
rain/snow/ice etc.otherwise it is off after engine start.
@@tomb4568
Continuous ignition is turned on during landed too.
Never knew about the “continuous ignition” feature. Learned something new today! 🙂
Nice video
GREAT JOB :-)
Nice to fly this ex Northwest DC-9 in 2012...how long will Delta fly this oldtimer?
Looks like the DC-9 ceased flying in North America in 2014, if i recall correctly. Looks like MD-88s are left behind for use for the time being until their eventual retirement.
@@DH111d which was June 2, 2020
Man, that plane was heavily loaded! Full flight?
Reduced thrust takeoff (derated)
The days when flying was fun. Not the awful modern days where they nickel and dime you to death.
I luv me some real flying!
Nice👍👍
@zerberus500 until September 2012...