A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Piloting
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Police chopper noise levels



 
 
Thread Tools Display Modes
  #1  
Old July 7th 08, 02:11 PM posted to rec.aviation.piloting,alt.law-enforcement
Charles Packer
external usenet poster
 
Posts: 8
Default Police chopper noise levels

At 3 AM recently I happened to be up and about and I
heard a whining-whirring sound that turned out to be the
police helicopter circling over the public housing
project up the street. But...when that chopper comes
around in the daytime and evenings, it's much louder --
the well-known bupbupbup that lowers the quality of life
in this part of town. So how did they fly relatively
quietly at 3 AM and why don't they use that mode more
often?

--
Charles Packer
http://cpacker.org/whatnews
mailboxATcpacker.org
Ads
  #2  
Old July 7th 08, 03:01 PM posted to rec.aviation.piloting,alt.law-enforcement
[email protected]
external usenet poster
 
Posts: 1,130
Default Police chopper noise levels

On Jul 7, 7:11 am, Charles Packer wrote:
At 3 AM recently I happened to be up and about and I
heard a whining-whirring sound that turned out to be the
police helicopter circling over the public housing
project up the street. But...when that chopper comes
around in the daytime and evenings, it's much louder --
the well-known bupbupbup that lowers the quality of life
in this part of town. So how did they fly relatively
quietly at 3 AM and why don't they use that mode more
often?

--
Charles Packerhttp://cpacker.org/whatnews
mailboxATcpacker.org


Diferent choppers, no doubt. The MD500 has no tailrotor and five
main rotor blades, and runs fairly quietly. Often used at night. The
other popular police copter is the Bell 206, which makes more noise
and that distinctive chop-chop sound.

Dan
  #3  
Old July 7th 08, 07:03 PM posted to rec.aviation.piloting,alt.law-enforcement
Gig 601Xl Builder
external usenet poster
 
Posts: 683
Default Police chopper noise levels


On Jul 7, 7:11 am, Charles Packer wrote:
At 3 AM recently I happened to be up and about and I
heard a whining-whirring sound that turned out to be the
police helicopter circling over the public housing
project up the street. But...when that chopper comes
around in the daytime and evenings, it's much louder --
the well-known bupbupbup that lowers the quality of life
in this part of town. So how did they fly relatively
quietly at 3 AM and why don't they use that mode more
often?

--
Charles Packerhttp://cpacker.org/whatnews
mailboxATcpacker.org



"Quality of life" and "public housing project up the street" are not
phrases that you see together very often.
  #5  
Old July 7th 08, 07:15 PM posted to rec.aviation.piloting,alt.law-enforcement
Steve Foley
external usenet poster
 
Posts: 563
Default Police chopper noise levels

"Charles Packer" wrote in message
...
At 3 AM recently I happened to be up and about and I
heard a whining-whirring sound that turned out to be the
police helicopter circling over the public housing
project up the street. But...when that chopper comes
around in the daytime and evenings, it's much louder --
the well-known bupbupbup that lowers the quality of life
in this part of town. So how did they fly relatively
quietly at 3 AM and why don't they use that mode more
often?


Blue Thunder - Whisper Mode?

  #6  
Old July 7th 08, 07:46 PM posted to rec.aviation.piloting,alt.law-enforcement
[email protected]
external usenet poster
 
Posts: 1,130
Default Police chopper noise levels

On Jul 7, 12:10 pm, John Smith wrote:
In article
,

wrote:
Diferent choppers, no doubt. The MD500 has no tailrotor and five
main rotor blades, and runs fairly quietly. Often used at night. The
other popular police copter is the Bell 206, which makes more noise
and that distinctive chop-chop sound.


Check before you SEND, Dan. :-))
Your are thinking of the 520N, NOTAR (No Tail roTAR)
Other versions of the 500 do have a conventional bladed tail rotor.

http://en.wikipedia.org/wiki/MD_Helicopters_MD_500


I was thinking of the original tailrotorless version, the
MD500N, but forgot the N:
http://www.deca-aviation.com/hawc1.htm
http://futurshox.net/aeroview.php?level=image&id=732
http://www.militarypictures.info/hel...d500n.jpg.html

Dan
  #7  
Old July 8th 08, 03:20 AM posted to rec.aviation.piloting,alt.law-enforcement
gpsman
external usenet poster
 
Posts: 148
Default Police chopper noise levels

On Jul 7, 10:01 am, wrote:
The
other popular police copter is the Bell 206, which makes more noise
and that distinctive chop-chop sound.


"Choppers"... go whop-whop-whop.
-----

- gpsman
  #8  
Old July 8th 08, 11:57 AM posted to rec.aviation.piloting,alt.law-enforcement
Charles Packer
external usenet poster
 
Posts: 8
Default Police chopper noise levels

On Jul 7, 10:01*am, wrote:
On Jul 7, 7:11 am,Charles wrote:

At 3 AM recently I happened to be up and about and I
heard a whining-whirring sound that turned out to be the
police helicopter circling over the public housing
project up the street. But...when that chopper comes
around in the daytime and evenings, it's much louder --
the well-known bupbupbup that lowers the quality of life
in this part of town. So how did they fly relatively
quietly at 3 AM and why don't they use that mode more
often?


--
Charles Packerhttp://cpacker.org/whatnews
mailboxATcpacker.org


* * * Diferent choppers, no doubt. The MD500 has no tailrotor and five
main rotor blades, and runs fairly quietly. Often used at night. The
other popular police copter is the Bell 206, which makes more noise
and that distinctive chop-chop sound.

* * * * *Dan


Hard for me to believe that D.C. police could afford two choppers.
Is there a Web site where the different makes are shown in profile so
I could learn to identify them?

--
Charles Packer
http://cpacker.org/whatnews
mailboxATcpacker.org

  #9  
Old July 8th 08, 01:44 PM posted to rec.aviation.piloting,alt.law-enforcement
john smith
external usenet poster
 
Posts: 1,446
Default Police chopper noise levels

In article
,
Charles Packer wrote:

Hard for me to believe that D.C. police could afford two choppers.
Is there a Web site where the different makes are shown in profile so
I could learn to identify them?


Some cities did not have to purchase helicopters.
The federal government has a program to give surplus equipment to state
and local governments if they apply for it.
Former US Army OH-58 helicopters (military model of the Bell 206) are
one of the items which come available as they are retired from military
service and are placed on the surplus list.
  #10  
Old July 8th 08, 02:16 PM posted to rec.aviation.piloting,alt.law-enforcement
Gig 601Xl Builder
external usenet poster
 
Posts: 683
Default Police chopper noise levels

Charles Packer wrote:

Hard for me to believe that D.C. police could afford two choppers.
Is there a Web site where the different makes are shown in profile so
I could learn to identify them?

--
Charles Packer
http://cpacker.org/whatnews
mailboxATcpacker.org


Strangely, the DC Metro police don't have anything on their webs site
about their aviation unit. (This is usually something that PDs brag
about.) They mention on their web site in one place that they have one
but no mention of the aircraft they use.

Being DC though they may use federal helos on an as needed basis in
addition to what they have in their own inventory.

Google "pictures of helicopters".
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FAA paper Noise Attenuation Properties of Noise-Canceling Headsets Jim Macklin Piloting 26 January 13th 07 01:06 AM
FAA paper Noise Attenuation Properties of Noise-Canceling Headsets Jim Macklin Instrument Flight Rules 15 January 13th 07 01:06 AM
Commercial Airline Pilot Complains about noise from Police Siren!! Skylune Piloting 18 December 22nd 05 09:46 PM
US military rejects Japan police request for chopper probe Otis Willie Military Aviation 0 August 19th 04 02:58 AM
Prop noise vs. engine noise Morgans Piloting 8 December 24th 03 04:24 AM


All times are GMT +1. The time now is 08:19 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2004-2019 AviationBanter.
The comments are property of their posters.