Abellio Greater Anglia Class 755s (Regional Trains)

Meerkat

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If you choose to live next to a railway line or an airport, you must expect noise.
If you choose to live in a semidetached house you must expect some noise from the neighbours.
That doesn’t mean you don’t have a valid complaint if new neighbours have a stadium worthy sound set up!
 
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pompeyfan

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Same old argument comes up, but if you get used to a certain noise level and suddenly it becomes far more intrusive then they’ve got a valid compliant.
 

LWT-NRW

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According to Google Maps measurements I live just over 700 metres to the west of Lowestoft station, and 125 metres (shielded by intervening houses) and 200 metres clear line of sight (and sound) of the tracks themselves. So with the Norwich and Ipswich services arriving and departing all day long I get to hear plenty of the 755's accelerating out at various rates (especially with working from home!)

The engine note of the "rogue" trains is noticeably louder and does sound akin to a turbofan aircraft engine; and when I first heard it I assumed a new mystery train was about, but no, in to view appeared a 755/3.

Whilst the note is a bit like a turbo fan engine it is certainly not particularly loud, and there are no shrill, or piercing notes. It's certainly not as load as the throaty, window rattling roar of a Class 37 as it left the station. How I miss those!
 

Ianno87

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According to Google Maps measurements I live just over 700 metres to the west of Lowestoft station, and 125 metres (shielded by intervening houses) and 200 metres clear line of sight (and sound) of the tracks themselves. So with the Norwich and Ipswich services arriving and departing all day long I get to hear plenty of the 755's accelerating out at various rates (especially with working from home!)

The engine note of the "rogue" trains is noticeably louder and does sound akin to a turbofan aircraft engine; and when I first heard it I assumed a new mystery train was about, but no, in to view appeared a 755/3.

Whilst the note is a bit like a turbo fan engine it is certainly not particularly loud, and there are no shrill, or piercing notes. It's certainly not as load as the throaty, window rattling roar of a Class 37 as it left the station. How I miss those!
A rogue one passed me in Cambridge (bound for Ipswich) yesterday and it sounded like a formation of Spitfires coming past. Really very noticeably louder.
 

61653 HTAFC

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Another planet...
Same old argument comes up, but if you get used to a certain noise level and suddenly it becomes far more intrusive then they’ve got a valid complaint.
If the noise changes you'll notice it more, even if the new units were quieter than the old. Give it a few months and the residents will have got used to the new engine note and will barely notice it.
 

ashkeba

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If the noise changes you'll notice it more, even if the new units were quieter than the old. Give it a few months and the residents will have got used to the new engine note and will barely notice it.
Or not, if as @dk1 recons, a software update will cure it.
 

61653 HTAFC

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Or not, if as @dk1 recons, a software update will cure it.
My point wasn't really that the residents are lying or that the new trains can't possibly be louder... just that we get used to the noises we hear regularly, so we notice when things change. For example I used to live within earshot of a motorway, and after a few weeks living there I got used to the constant drone of road noise. On Christmas day when there was significantly less traffic on the motorway, the absence of the noise I'd become accustomed to was very noticeable and seemed weird at first. With everyone on lockdown things like that will be noticed more and more.
 

WroxhamTroll

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Norfolk
Looking at the posts in the village facebook group most were asking if the train was faulty and how to let GA know. If this was a new set of trains then you are correct it's just a new noise. However this is a 755/3 that's been running in service for months that suddenly sounds very different and louder. If your car did that it would be back to the garrage to ask why.

I am assuming the software change is to run the fans harder to stop engine shutdowns?

Good news is I can now know if the next service is a 755/4 or 3 just by listening.

WT
 

Abbo

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Sheringham
My point wasn't really that the residents are lying or that the new trains can't possibly be louder... just that we get used to the noises we hear regularly, so we notice when things change. For example I used to live within earshot of a motorway, and after a few weeks living there I got used to the constant drone of road noise. On Christmas day when there was significantly less traffic on the motorway, the absence of the noise I'd become accustomed to was very noticeable and seemed weird at first. With everyone on lockdown things like that will be noticed more and more.
This reply reminds me of a tale I was going to relate to the EDP but didn't get around to it. In 1964 I left Mundesley to go to Liverpool Street and was lodged in the Ilford Hostel next to the Ilford Flyover ~ constant trains day and night. I didn't sleep for about the three nights then got used to it. The came Christmas Day , very few trains and no overnighters so I couldn't sleep. The sensitive souls of Hoveton and Wroxham will soon get used to the new noise.
 
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mawallace

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Have to day - I live in Thurston and many of those years next to the rail line - you get used to the noise.

I was out washing my car this morning and it's noticeable that the trains are making more noise when pulling away from the station - it is a high pitched sound which seems to be more noticeable than the lower tone of the 66's that come thorough.
 

Abbo

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This reply reminds me of a tale I was going to relate to the EDP but didn't get around to it. In 1964 I left Mundesley to go to Liverpool Street and was lodged in the Ilford Hostel next to the Ilford Flyover ~ constant trains day and night. I didn't sleep for about the three nights then got used to it. The came Christmas Day , very few trains and no overnighters so I couldn't sleep. The sensitive souls of Hoveton and Wroxham will soon get used to the new noise.
Another very short letter in today'd EDP points out the fact that the 'new' trains have engines above the floors when the older trains had them underfloor. Has the writer got a valid point ?
 

Energy

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Another very short letter in today'd EDP points out the fact that the 'new' trains have engines above the floors when the older trains had them underfloor. Has the writer got a valid point ?
I wouldn't say so, they still have engines and although it affects noise outside the train I doubt it would affect noise outside the train.
 

LWT-NRW

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As the engine exhausts vent skywards from the roof of the power unit in the class 755's I would have thought it would make some difference trackside to noise levels compared to engines located below the floor.

IMG_2729.jpg
 

Domh245

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The engines on the existing stock also exhausted upwards?? The cooling vents (which also seem to be on the roof and are the main cause of the sudden increase in noise IIRC) may not help the noise compared to the existing stock
 

Peter Sarf

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The engines on the existing stock also exhausted upwards?? The cooling vents (which also seem to be on the roof and are the main cause of the sudden increase in noise IIRC) may not help the noise compared to the existing stock
The 91s iirc are pretty noisy. Being electric that is screaming cooling fans. I have noticed the 374s with their distributed traction are almost silent (only hear the squeaking brakes) when coasting into St Pancras compared to the almighty howl from a coasting 373. So yes the noise from a 755 could well be the cooling system rather than the engines - and with summer coming ?.
 

TheEdge

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The engines on the existing stock also exhausted upwards?? The cooling vents (which also seem to be on the roof and are the main cause of the sudden increase in noise IIRC) may not help the noise compared to the existing stock
The new noise is from the cooling fans and it does appear to be far louder on a few of the 3 cars than others. It isn't fleet wide.
 

Rhoobarb

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I live about half a mile from a wherry line station. Always able to hear the 755s pulling away from the station, although as has been said the cooling fans kicking in on some units does raise the decibels. However, I don't think it's too much louder than the GA 170s which were themselves loud when their cooling fans were operative (which seemed to be most of the time in the summer months).
 

dk1

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I notice earlier the vegetation at Yarmouth sidings has been cut back. Is stabling units here back on the cards?
This was discussed recently in a seperate thread about Yamouth carriage Sidings & it doesn't look like it to be honest. I think it's just part of the contract around the resignalling is that they are in full working order. Apart from vegetation clearance, Sidings have been spot sleepered & even rerailed as necessary even though there may be no future use planned at the current time.
 

Rick1984

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The 4 car Flirt I got around 1630 from Cambridge to Norwich yesterday seemed very noisy on diesel.
Don't know if it was just because I was sat behind the power module and the doors to it were open.
 

dk1

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The 4 car Flirt I got around 1630 from Cambridge to Norwich yesterday seemed very noisy on diesel.
Don't know if it was just because I was sat behind the power module and the doors to it were open.
Yeah it's always better to sit away from it unless like many you prefer the throb. All internal doors are set to be open at the moment due to Covid-19.
 

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