The whooping is the compressor motor, 3 phase starting up across the line, inrush current on the windings. I work in HVAC and large water pumps (10-100HP) make the same, awesome sound!
@@polhpolh64 Its because the phase currents in big motors are much larger than smaller motors. The noise happens because the phase currents in the windings create a magnetic field which vibratess nearby metalic objects at the carrrier/phase frequency. The stronger the phase currents the stronger the field and the louder the sound.
LITERALLY listening to this in person now!!!! It’s night and I’m in bed by my window and live by a canyon. This noise ECHOS was throughout and sounds soo cool then after this noise I hear more of the engin roar, then it hisses (like it’s shooting compressed air) then next comes the loud ass train horn!!🤣 I love it I noticed the Whooping happens a could of times
So that’s what that whooping sound is. I’ve been wondering what that sound was since I was 9 and now here I am, 19 and I finally know what that sound is
*WE'VE HIT AN ICEBERG!* LMFAO, the starting bells on these Junk-Gevos as I call them sound just like Titanic's watertight door bells. I prefer starting a U50C, U50, and U-Boat Universal Series over a ES44AC any day.
The prime movers are different between these GEVOs and the P42s, but as far as I know most all modern GE locomotives use similar secondary components like air compressors and such.
Diesel locomotives were largely unregulated for many years but the EPA has started enforcing new emission requirements for locomotives starting in 2000. Most new locomotives have been and are still able to meet the standards without DEF even with the new Tier 4 regulations that were effective starting in 2015. EMD/Progress Rail's F125 does require exhaust after treatment and as far as I know it's the only one so far that does.
Probably because most street truck are modifying them to do so. Also they do not weigh 195 tons and 1000 cubic inches per cyl. Full load and hp at 1000 rpm. Most are clean at full song. Unless not loading properly. Added plus they dont idle in front of schools waiting to pick up their kids.
Most modern locomotives have auto shutoff/auto start functions. The ringing is an alarm, and I think it’s usually alerting that it is about to auto start.
