[AGreatPer]

Just don't sit in the back of a 717. The noise is unbelievable.

This plane has always scared the carp out of me. Engines just don't look like they can do the job. But they have, over the years. Great track record.

[Lexinom]

Not sure about the DC-9 (aka the Boeing 717), but the MD-80 uses P&W JT8D's, rated around 20k lbs. thrust, with a 1.74 (low) bypass ratio. They are loud, and yes I have sat at the rear of these aircraft, but it's a swishy/whiny kind of loud, not a deep vibrating buzz as found on the 737-900 with it's super-high bypass engines.

Truth be told, I almost miss for nostalgia's sake the deafening shriek of the old water-cooled turbojets on the early 707's. Realize they're not at all efficient, but oh that sound! Fortunately their descendents live on in our military fighter jets.

[Gamecock]

This plane has always scared the carp out of me.

I would think you wouldn't want carp in you...