Sound of Wright vs Pratt Whitney (Super Constellation vs. DC4)
Ok, this one will bring tears to the vintage flyers amoung you with memories and a soft spot for pistons ...
As I mentioned in an other thread I grew up in the flight approach path of BOG El Dorado. To say that the sound of a Super Constellation flying over head was distrinctive is an under statement when comparied to the sound of a DC4 or even a DC6. Also to see the Super Constellation at fly over at night with all four exhaust stacks on fire ...
My father once said that the difference was due to the Wright engines on the Connie having synchronised firing making for a more uniform and smoother sound.
Not sure about the DC7 which also had Wrights.
I wish I could remember the sound of the Stratocruiser's P&W Wasp Mayor corn cobs whether they were synchronised and if they therefore sounded similar to the Connie. Something tells me the were but ...
I could also easily tell between a Curtis Commando ( C46) and a DC3 without stepping outside to look.