McDonnell Douglas DC-9 and MD-88 Sound Comparison

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Here’s a little short showcase of the notable differences in noise level between two gorgeous classic jets; the McDonnell Douglas DC-9 and MD-80 series aircraft. The MD-80 series jets are equipped with Pratt and Whitney JT8D-217/219 engines while the DC-9s are equipped with the older and louder JT8D-9 engines.
JT8D-1 through JT8D-17 engines require Stage III hushkits to remain compliant with ever-stricter FAA noise regulations, whereas the JT8D-200 series (-217/-219 series JT8Ds) are built to be Stage III compliant from the start.
Notice the differences in pitch between the two idling engines, as well as the major difference in the prominent thundering/ripping/crackling sound of the DC-9 versus the less thunderous MD-80.
The two aircraft in the video are:
- XA-UPS, a 53 year old DC-9-30F operated by Aeronaves TSM.
- N837US, a 32 year old MD-88F operated by USA Jet.
Enjoy!

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Опубликовано:

20 май 2023

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Комментарии : 5

@Duderocks5539 Год назад

Obviously different throttle profiles, but off camera and data both prove the DC-9 is much louder then an MD-80 even with Stage III hush kits. JT8D-1 through -17 were derived and built off the J52 Turbojet that powers the A-4 Skyhawk, A-6 Intruder, and EA-6B Prowler. It has a bypass ratio (0.96 to 1) compared to the JT8D-209, -217, and -219 which have a bypass ratio (1.74 to 1). Adding a hush kit to the JT8D-1 through -17 to throw the bypass air directly into the core air stream does quiet down the crackle, but the -200s have just a much a higher volume of bypass air to cushion the core air stream and a more efficient mixing process, plus multiple other factors of the engine such as acoustic treatment, etc. 2 completely different engines.

@robertminard6357 6 месяцев назад

Damn hushkits.!!!!!

@trevorc5 Год назад

those 2 aircraft have been my very favorite aircraft in the world especially Delta's MD88 anytime they say USA Jet MD 88 makes call it a Delta MD 88 it's really Delta's MD 88 they retired but sold to USA Jet

@masonmccall6591 Год назад

That’s correct! It’s nice to see the old Delta maddogs be given a second life.

@zeroelus Год назад

I'm a simple man, I see a USA Jet MD or a TSM DC or Maddog and I listen and click like. I literally believe a TSM MD just flew overhead as I was typing this. Turned the video off and heard a very similar sound outside lol.