Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 


Wheel dampers next step to reduce J'ville line squeal noise

Media release from Greater Wellington Regional Council

18 March 2013

Wheel dampers next step towards reducing wheel squeal noise on Johnsonville Line

A trial of wheel dampers, which reduce noise radiation, on two trains next month is the next step towards trying to reduce the wheel squeal noise on parts of the Johnsonville Line, says Fran Wilde, Chair of Greater Wellington Regional Council.

The noise emerged after the new Matangi trains began running regularly on the Johnsonville Line just on a year ago.

The squealing noise is created when the wheels of the train manoeuvre through some tight corners. “The old English Electrics that used to run on the line generated more noise but it is the high-pitched tone of this particular noise that is literally getting on some people’s nerves.

“Wheel squeal issues are not uncommon on rail lines around the world, so we were able to engage some rail experts experienced with these issues. They investigated the exact cause of the problem and developed a range of possible solutions for us. We’re now trialling the two top solutions.”

Fran Wilde says over the last few months a friction modifier material has begun to be applied to the track on some parts of the line to modify the steering performance of the wheel sets on tight curves. The material is then distributed, via the wheels of the train, further along the line. “This is having varying levels of success – some trains are less noisy but others aren’t. Staff are currently investigating ways to increase coverage of the friction modifier to reduce the noise all along the line.”

From next month wheel dampers - devices that reduce the radiation of noise - will be trialled on the wheels of two trains.

“Hopefully the greater spread of friction modifier on the track and the effect of the wheel dampers should significantly reduce noise levels.

“I appreciate the distress the wheel squeal noise is causing to some residents who have to put up with the noise day in and day out, but I can assure them that this is the number one priority for our rail operations staff and they are determined to find a lasting and effective resolution to this issue.”

Regional Council and KiwiRail staff will give a full update to residents at a public meeting at Ngaio Town Hall on Wednesday evening at 7.30pm.

ENDS

© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

Gordon Campbell:
On The Team Behind Trump's Throne

Forget the Putin factor. Daily, the team of charlatans, bigots and stunningly ignorant crackpots that Trump is appointing to head key federal agencies is just as alarming. These are positions with vast power and budgetary discretion over policies that stand to affect tens of millions of vulnerable Americans. Sad! More>>

 

Gordon Campbell: On Bill English, Abroad

If David Cameron was the closest thing John Key had to a political mentor, their successors also share a whole lot in common. Theresa May and Bill English were both propelled into the top jobs as the result of unexpected resignations, and without much in the way of credible competition from their colleagues... More>>

ALSO:

Pike River: Labour Bill To Override Safety Act For Mine Entry

“Bill English has been hiding behind the legal excuse that any attempt to re-enter the mine to recover the bodies might place the mine’s owner, Solid Energy Limited, and its directors in breach of the Health and Safety at Work Act 2015." More>>

ALSO:

Gordon Campbell: On Populism And Labour 2017

For many people on the centre-left, populism is a dirty word, and a shorthand for the politics of bigotry. In this country, it has tended to be equated with the angry legions of New Zealand First. Who knew they were not just a reactionary spasm, but the wave of the future? More>>

Oxfam: 30% Of NZ Owns Less Wealth Than Our Two Richest Men

The research also reveals that the richest one per cent have 20 per cent of the wealth in New Zealand, while 90 per cent of the population owns less than half of the nation’s wealth. The research forms part of a global report released to coincide with this week’s annual meeting of political and business leaders at the World Economic Forum in Davos, Switzerland. More>>

ALSO:

Hospitals: Resident Doctors Set To Strike Again

Despite discussions between the DHBs and NZRDA over safer hours for resident doctors progressing during the last week, the strike planned for next week appears set to proceed. More>>

ALSO:

Not So Super Fund: More Burning Ethical Questions For Steven Joyce

Greens: Radio New Zealand reported this morning that the New Zealand Superfund has $77 million invested in 47 coal companies that the Norwegian Government’s Pension Fund – the largest sovereign fund in the world – has blacklisted. More>>

Activism: Greenpeace Intercepts World’s Biggest Seismic Oil Ship

Greenpeace crew have made contact with the world’s biggest seismic oil ship after travelling 50 nautical miles on two rigid-hulled inflatables off the coast of Wairarapa... Greenpeace radioed the master of the Amazon Warrior to deliver an open letter of protest signed by over 60,000 New Zealanders. More>>

ALSO:

Gordon Campbell: Why Tax Cuts In 2017 Would Be A (Proven) Bad Idea

Ever since the world fell prey to the mullahs of the free market in the 1980s, no amount of real world evidence has managed dispel one key tenet of their economic faith. Namely, the idea that if you cut income taxes and taxes on small business, a wave of individual enterprise and entrepreneurial energy will thus be unleashed, profits will rise and – hey bingo! – the tax cuts will soon be paying for themselves ... More>>

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news