Forums

 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   ProfileProfile   Log in to check your private messagesLog in to check your private messages 
Dangerously low planes?
Goto page Previous  1, 2
 
Post new topic   Reply to topic    Fortean Times Message Board Forum Index -> Notes and Queries
View previous topic :: View next topic  
Author Message
stunevilleOffline
Admin
Joined: 09 Mar 2002
Total posts: 10551
Location: FTMB HQ
Age: 47
Gender: Male
PostPosted: 20-07-2013 06:45    Post subject: Reply with quote

Right - me mate replied on the hoof (he's away too) so it's shortish:

"It's hard to tell what sort of plane by noise alone, because at distance the higher pitches fade but the low pitches carry a long way and most jet engines have a similar overall noise. From far away a Tornado doesn't sound very different from an Airbus, it's only up close you can hear the difference. That part of UK is probably fighters taking off and landing and flat topography means you won't necessarily see them but you'll hear them for miles, it can be hard to gauge where deep noises come from, and the sound can bounce around buildings and hills produce weird effects as the plane flies by which is why they can suddenly sound very loud then very quiet, its generating the same consistent noise at source but the echoes distort it. There are a few commercial flightpaths over there but no major airports close by so airliners would be high up and quite visible so I'd say it is military over the horizon."

The odd syntax is all his Smile.
Back to top
View user's profile Send e-mail 
MythopoeikaOffline
Joined: 18 Sep 2001
Total posts: 10645
Gender: Unknown
PostPosted: 20-07-2013 10:34    Post subject: Reply with quote

What odd syntax?
Back to top
View user's profile 
Dingo667Offline
I'm strange...but true
Joined: 27 Aug 2004
Total posts: 2000
Location: Deep in the Fens, UK
Age: 47
Gender: Female
PostPosted: 20-07-2013 12:40    Post subject: Reply with quote

Spudrick68 wrote:
I have a friend who has recently passed as a pilot. I'll ask him too when he gets back from holiday. You never know.


Thanks. I hope we'll find out. This is one genuine mystery to me. confused
Back to top
View user's profile Visit poster's website 
CochiseOffline
Great Old One
Joined: 17 Jun 2011
Total posts: 1774
Location: Gwynedd, Wales
Age: 58
Gender: Male
PostPosted: 21-07-2013 07:44    Post subject: Reply with quote

I often get low flying planes, because the RAF practice around here. The jet fighters can be difficult to see, because the plane is ahead of its sound, so to speak, so one instinctively looks in the wrong place.

But even though they are very low - well below the mountain-tops - they do make the distinctive Doppler effect, and if there is more than one (they are usually in pairs)you can clearly distinguish each one as it goes by.

I used to live right next to an airport, and occasionally you would hear engines being tested by being run at full bore for some minutes, but even though we lived within a hundred yards or so of the end of one of the runways, that was never as loud as a take-off. But these were civil aircraft, in the main.

Loudest noise ever - visiting Vulcan taking off on 'our' runway and doing a sharp turn - apparently standing on one wing-tip - right over our heads. We were gardening at the time. Brilliant. And sure did upset all the nimbys who'd bought a house next to the airport and started complaining about the noise. (I'm not a plane enthusiast, we bought the house because we could afford it - it was cheap because it was next to the airport. And a main road. And a railway. And therefore obviously subject to noise.)
Back to top
View user's profile 
eburacumOffline
Papo-Furado
Joined: 26 Aug 2005
Total posts: 1663
Gender: Unknown
PostPosted: 20-08-2013 01:30    Post subject: Reply with quote

There was a helicopter hovering over York last night for ages, and the sound was very peculiar - sort of echoey, unlike any helicopter I've heard before. I think weather conditions have a lot to do with how the sound reverberates sometimes.
Back to top
View user's profile 
Dingo667Offline
I'm strange...but true
Joined: 27 Aug 2004
Total posts: 2000
Location: Deep in the Fens, UK
Age: 47
Gender: Female
PostPosted: 20-08-2013 10:44    Post subject: Reply with quote

Thanks for mentioning weather conditions. Just last night I was thinking that the extremely loud sound could be from weird conditions. Maybe they get amplified somehow. That is why I would like someone who knows about these things to read this.
Too loud and too long but definitively a plane. I'm still waiting for it to happen again, because I will be recording it.
Back to top
View user's profile Visit poster's website 
oldroverOffline
Great Old One
Joined: 18 Oct 2009
Total posts: 2334
Location: Wales
Gender: Male
PostPosted: 10-11-2013 17:29    Post subject: Reply with quote

Cochise wrote:


But even though they are very low - well below the mountain-tops - they do make the distinctive Doppler effect, and if there is more than one (they are usually in pairs)you can clearly distinguish each one as it goes by.



Buzzed by two stupidly low on the road between the Cross Foxes and Corris Thursday, I thought the car had split in half at first.
Back to top
View user's profile 
ramonmercadoOnline
Psycho Punk
Joined: 19 Aug 2003
Total posts: 21047
Location: Dublin
Gender: Male
PostPosted: 10-11-2013 19:02    Post subject: Reply with quote

At least they didn't strafe you.
Back to top
View user's profile 
oldroverOffline
Great Old One
Joined: 18 Oct 2009
Total posts: 2334
Location: Wales
Gender: Male
PostPosted: 10-11-2013 20:00    Post subject: Reply with quote

There is that at least.
Back to top
View user's profile 
CochiseOffline
Great Old One
Joined: 17 Jun 2011
Total posts: 1774
Location: Gwynedd, Wales
Age: 58
Gender: Male
PostPosted: 11-11-2013 09:55    Post subject: Reply with quote

Not all of ours are jets - I was out on the motorbike one morning and suddenly thought the engine was about to seize - deep growl and vibration. Rolled off the throttle and some huge four-propellered military transport thing went over about 100 feet up. This was down by Penrhydeudraeth.
Back to top
View user's profile 
oldroverOffline
Great Old One
Joined: 18 Oct 2009
Total posts: 2334
Location: Wales
Gender: Male
PostPosted: 11-11-2013 19:55    Post subject: Reply with quote

Now we get those all the time down here, great big huge things in pairs that come over the house at about 2-300ft. I once saw one so stupidly low in the southern Cambrians I thought for ages that it must have crashed.
Back to top
View user's profile 
markrkingston1Offline
Great Old One
Joined: 04 Aug 2007
Total posts: 100
Location: London, England
Gender: Male
PostPosted: 20-02-2014 05:19    Post subject: Re: Dangerously low planes? Reply with quote

Dingo667 wrote:
Every now and then, we hear a really loud rumbling noise which seems to go on for far longer than it would take a plane to fly by.
[...]
Got out of car and this noise starts. It is quite deep [makes me think that it has to be large and heavy] and it always sounds as if the plane is far too low for comfort. It is also incredibly loud and it lasts for maybe a minute or so.


You hear exactly this effect in Southall which is about two to three miles to the north east of Heathrow. Now, you might think: Well, of course you are going to get aircraft noise that close to Heathrow. However, this sound effect does not emanate from aircraft in the sky. In fact Southall is not directly below any normal flight path for Heathrow.

I am pretty certain that the noise comes from airliners in the process of either landing or taking off. Specifically I think it is either the sound generated by the use of thrust reversers during the landing roll or very high thrust output at take off.

In open country this very high volume, low frequency sound could travel a very long way indeed.

I have not carried out any research to confirm my hypothesis. Such research would ideally need someone at the airport making a note of the exact times of landings and take offs and someone in Southall noting the start and end times of the noise. This would allow the sound to be correlated with specific aircraft actions, taking into consideration the travel time for sound.

Sadly the friend I used to visit in Southall no longer lives there so I am unlikely to do this research myself now.
Back to top
View user's profile 
Display posts from previous:   
Post new topic   Reply to topic    Fortean Times Message Board Forum Index -> Notes and Queries All times are GMT
Goto page Previous  1, 2
Page 2 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group