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CRJ/ERJ Windscreen Noise  
User currently offlineFlyASAGuy2005 From United States of America, joined Sep 2007, 7004 posts, RR: 7
Posted (6 years 12 months 2 days 15 hours ago) and read 2693 times:

I have heard this several times that the CRJ cockpit is much more quiet the ERJ (CRJ200/700, ERJ135/145 not E-jets). This came from an ASA captain. I too have noticed that the ERJ guys are always wearing David Clarks or some other large headsets for this exact reason supposedly. Yep, I've seen the CRJ pilots wearing the little Telex head phones.

Second, why is the 135/145 APU so loud! I HATED working around those things. I always tried to avoid the north end of D concourse for this same reason. You could hear the thing from halfway down D and when you drive behind it, it was this high screeching noise; almost deafening.


What gets measured gets done.
8 replies: All unread, jump to last
 
User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 1, posted (6 years 12 months 2 days 13 hours ago) and read 2672 times:

Quoting FlyASAGuy2005 (Thread starter):
Second, why is the 135/145 APU so loud!

For the ERJ a lot depends on the APU Exhaust Mod installed. Older APU's are much louder then the newer models. You may have also had one with a curled impeller blade. Those will just scream loud........!!

[Edited 2007-12-23 13:35:18]


"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlineHals From United Kingdom, joined Aug 2005, 44 posts, RR: 0
Reply 2, posted (6 years 12 months 2 days 13 hours ago) and read 2655 times:

The ERJ-135/145 nose end and cockpit area is very similar to the EMB-120 externally. At the higher speeds that the ERJ's fly at cockpit noise due to wind/airflow is quite noticable I'm led to believe. Though I stand to be corrected...

[Edited 2007-12-23 14:08:39]

User currently offlineKstatepilot From United States of America, joined Mar 2007, 159 posts, RR: 0
Reply 3, posted (6 years 12 months 2 days 12 hours ago) and read 2646 times:

Also depends on the CRJ. Some of the older ones have a different wiper on them. This creates alot more noise. The newer ones are quieter but still not very good. The 700/900 are quiet enough you don't really need headsets.

User currently offlinePilotpip From United States of America, joined Sep 2003, 3152 posts, RR: 10
Reply 4, posted (6 years 12 months 2 days 11 hours ago) and read 2632 times:

The nose is exactly the same on the 135/145 as it is on the 120. You have a turboprop nose going a lot faster. The wipers create a ton of noise.


DMI
User currently offlineA10WARTHOG From United States of America, joined Jul 2004, 325 posts, RR: 0
Reply 5, posted (6 years 12 months 2 days 10 hours ago) and read 2614 times:



Quoting EMBQA (Reply 1):
For the ERJ a lot depends on the APU Exhaust Mod installed. Older APU's are much louder then the newer models. You may have also had one with a curled impeller blade. Those will just scream loud........!!

Yes, the sound of an APU change. I once stood at our hangar and listen to a APU of one of our planes scream, while it was at the gate. The gate was 1/2 mile away.


User currently offlineEMBQA From United States of America, joined Oct 2003, 9364 posts, RR: 11
Reply 6, posted (6 years 12 months 1 day 19 hours ago) and read 2558 times:



Quoting A10WARTHOG (Reply 5):

Not being there... but I'd say it had a curled blade. Those will just scream......


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Some older planes have been modified, but the cost is pretty high



"It's not the size of the dog in the fight, but the size of the fight in the dog"
User currently offlinePilotpip From United States of America, joined Sep 2003, 3152 posts, RR: 10
Reply 7, posted (6 years 12 months 1 day 6 hours ago) and read 2493 times:

The APU's crap out on the 145s so often that the mod has been done to most of our airplanes.


DMI
User currently offlineModesto2 From United States of America, joined Jul 2000, 2819 posts, RR: 5
Reply 8, posted (6 years 12 months 19 hours ago) and read 2449 times:

The ERJ cockpit is really loud. That's exactly why you may see ERJ pilots wearing David Clark's! Some of the guys have their own headsets but many of them wear earplugs with these headsets. I just stick to the DC's so I don't go deaf in a few months!

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