N8911E From United States of America, joined May 2012, 48 posts, RR: 0 Posted (1 year 5 days 6 hours ago) and read 2511 times:
Hello,
I am oblivious as to what the noises are when a BR715 FIRST Starts. It sounds like card spokes in a bicycle as it slowly starts up. I never notice this on any other engine.
Can ANYBODY please help me figure out what that sound is, and why it is so noisy at first?
PapaChuck From United States of America, joined Aug 2010, 134 posts, RR: 0 Reply 1, posted (1 year 5 days ago) and read 2447 times:
If you are referring to the loud buzzing sound as the engine starts, that's more than likely coming from inside the cabin. Could be almost anything, perhaps a loose tray table latch or some other plastic fitting vibrating in harmony with the engine. Hard to tell, but it sounds like it's coming from inside, not out.
N243NW From United States of America, joined Jul 2003, 1489 posts, RR: 21 Reply 3, posted (1 year 4 days 14 hours ago) and read 2279 times:
To me, it definitely appears to be some cabin fixture rattling. It's a plasticky sound, so it would strike me as a cabin ceiling or sidewall panel, overhead bin, tray table, seat, etc.
N8911E From United States of America, joined May 2012, 48 posts, RR: 0 Reply 5, posted (1 year 4 days 6 hours ago) and read 2164 times:
Thanks guys. May I ask, and possibly get some answers as to why it does this on the 717 only? DC9s or MD80s don't do it, and I can't recall if the MD-90 did it.
kcrwflyer From United States of America, joined exactly 9 years ago today! , 3627 posts, RR: 7 Reply 7, posted (1 year 3 days 10 hours ago) and read 2000 times:
Quoting N8911E (Reply 5): Thanks guys. May I ask, and possibly get some answers as to why it does this on the 717 only? DC9s or MD80s don't do it, and I can't recall if the MD-90 did it.
The 717 engine and the D9/MD engines are drastically different.
The 715 can have a very deep growl when getting started.. sometimes more noticeable than others. The rattling sounded like a vibration in the cabin.
AA737-823 From United States of America, joined Mar 2000, 5333 posts, RR: 11 Reply 8, posted (11 months 2 weeks 4 days 1 hour ago) and read 1318 times:
Yup, it's interior stuff.
The BR715 does have some very distinctive startup noises, though... I always thought the thing sounded like someone filled the oil reservoir with bee-bees.
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