The BNR (another way)

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GeraldH
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Re: The BNR (another way)

Postby GeraldH » Thu May 16, 2019 5:54 pm

Thank you Mountain.

There has been a recent discussion in the "other place" about brake coaches to match the Hornby 4 wheelers. The BNR workshops have had a couple of goes at this and No 1 can be seen hauling the brake alongside one of the regular 4 wheelers. It has Ratio sides grafted into a Hornby body, unfortunately the grafting in is rather obvious close up. It really is time Hornby produced one themselves :) .

4WheelTrain.JPG
Gerald H - BNR Correspondent :)

My layout: http://www.newrailwaymodellers.co.uk/Fo ... hp?t=28854

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Mountain
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Re: The BNR (another way)

Postby Mountain » Fri May 17, 2019 9:03 am

Wow captain BNR. That looks great! Yes, I agree. If Hornby made a brake version they would sell loads of them. Such a needed product, as we all love those 4 wheel coaches even if we don't have one. (I have one left in Caldonian blue. Anyone interested in it? The loco in the same colour I have will be used as a donor loco for a future 7mm narrow gauge project. Ooh. I also have a yellow track cleaning coach with very low useage in its box somewhere...)

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GeraldH
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Re: The BNR (another way)

Postby GeraldH » Fri May 31, 2019 9:56 am

The workshops have made some further progress on the 43XX. First the remains of the old gear spindle were removed and a hole drilled through the chassis where the previous spindle was.

DrillSpindle.JPG


Some 2mm stainless steel rod was then inserted into the hole to provide a new spindle for the gear. The chassis was reassembled for a test run, but the wheels kept locking up. It was initially thought that the wheels had gone out of quarter, but they looked OK. On closer examination it turned out that one side of the chassis had expanded slightly due to mazak rot.

NewSpindle.JPG


Another railway kindly sent a spare chassis block to the BNR workshops, but the shipping company somehow managed to snap the ends off the chassis blocks during transit! In desperation BNR staff superglued one of the chassis blocks back together and reinforced it with JB Weld. The chassis was reassembled and the loco remarkably runs! Having said that, it is not the smoothest of runners and may be suffering from overheating. The loco department have consequently decided to put the 43XX on light duties and will in the longer term look into adapting an alternative chassis.

43XX.JPG
Gerald H - BNR Correspondent :)

My layout: http://www.newrailwaymodellers.co.uk/Fo ... hp?t=28854

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Mountain
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Re: The BNR (another way)

Postby Mountain » Fri May 31, 2019 10:30 pm

Wow. Your workshops certainly try out ideas for repairs. :)

Something I am thinking of... Is it a possile that all mazak will rot eventually given enough time? Mind you, plastic does break down so the likelihood ones loco bodies will still be in one piece by then....

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Bufferstop
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Re: The BNR (another way)

Postby Bufferstop » Sat Jun 01, 2019 1:44 pm

It's the presence of lead in the mix eventually causes the rot. Early Dinky toys were the first to show it, samples of which that avoided the lead are still as strong as when they were produced pre WW2. It was the need to produce reliable castings for the War Ministry the started the investigation and found the answer. The problem now is modern day contractors who aren't scrupulous about the mix.
Growing old, can't avoid it. Growing up, forget it!
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GeraldH
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Re: The BNR (another way)

Postby GeraldH » Fri Aug 16, 2019 5:39 pm

In an attempt to resolve the rotten chassis issue with the Mainline 43XX, workshop staff have been picking up poorly Airfix and Mainline 61XXs as potential chassis donors. As always with the loco department, things have got slightly out of hand and a barely used Mainline model was picked up at a good price. Despite the loco being noisy enough to wake the dead, the operating department quite liked the loco's power and mechanical simplicity. They therefore persuaded management to keep it as is.

Two more damaged 61XXs were acquired along with a more attractive black Hornby body. The body was missing buffers, buffer beam hooks and had a loose tank vent. Workshop staff fixed these issues with parts they had in the depot, they also managed to restore a barely used non-running chassis and have created a second 61XX.

The only remaining problem is a very common one with these locos and that is the floppy rear couplings on the trailing truck. This is caused by the failure of a small piece of plastic to hold the top and bottom of the truck together to grip the couplings.

Trailing.JPG


Workshop staff cut off the protruding bit of plastic and drilled a hole right through the rear truck.

Trailing2.JPG


A self tapping screw was then inserted into the lower hole which pulls the assembly tight together.

Trailing3.JPG


The black Prairie is also pretty noisy but runs well and is able to take even the heaviest trains up the steep gradients on the line. The remaining parts will be kept for spares and possibly used to reinstate the 43XX, although a replacement Bachmann chassis has now been sourced.

Prairie.JPG
Gerald H - BNR Correspondent :)

My layout: http://www.newrailwaymodellers.co.uk/Fo ... hp?t=28854

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GeraldH
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Re: The BNR (another way)

Postby GeraldH » Wed Aug 28, 2019 8:15 pm

Heavy Bank Holiday traffic and slippery rails caused by oil deposited on the track from recently serviced locos, meant that double heading was called for. BNR No's 2 & 8 work very well together and can take 6 coaches up the steep gradient on the mainline without slipping. The only other steam option was the Ivatt 2-6-2 or the 9F.

BHols.JPG
Gerald H - BNR Correspondent :)

My layout: http://www.newrailwaymodellers.co.uk/Fo ... hp?t=28854


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