Hornby B12

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Lord Colnago
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Hornby B12

Postby Lord Colnago » Sun Jun 23, 2019 1:25 pm

Has anyone any experience of converting a Hornby B12 to P4?
The second best priest

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Lord Colnago
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Re: Hornby B12

Postby Lord Colnago » Tue Jun 25, 2019 2:14 pm

I'll take that as a no then.
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Crepello
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Re: Hornby B12

Postby Crepello » Tue Jun 25, 2019 4:49 pm

Perhaps we're all waiting for the correct driving wheels?

RichardS
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Re: Hornby B12

Postby RichardS » Tue Jun 25, 2019 5:19 pm

Surely in some darkened mountain workshop an intrepid engineer with googly eyes has already turned down the flanges of the Hornby wheels and reprofiled any other erroneous aspects. Or do such things only occur successfully in magazine articles? Perhaps the artisan is so engrossed in filing his spokes that time and place have lost all meaning and his cobweb draped skeleton still clutching a swiss 3 square will be found by a future version of Tony Robinson skipping between trenches in a holographic time team projected onto a coffee table.
Lest the membership be so reduced by such extreme requirements could somebody please help his Lordship soon. The integrity of the North Norfolk Area Group's layout 'North Elmham' depends upon the appearance of a B12.
Wot? No B12?
Never in the field of scale railway modelling has so much depended upon so few.
I thank you. :-D
Kind regards
Richard

I'm not always a railway modelling heretic

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Lord Colnago
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Re: Hornby B12

Postby Lord Colnago » Tue Jun 25, 2019 5:40 pm

[quote="Crepello"]Perhaps we're all waiting for the correct driving wheels?[/quote.

Alternatively, one could accept a modicum of compromise and get on with it using the best option available.

John.
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John Bateson
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Re: Hornby B12

Postby John Bateson » Tue Jun 25, 2019 6:12 pm

Alan Gibson for a start/compromise?
4878E 6’ 6" 26.0mm. 20 spoke LNER B12 Class Plain PB12" 4.00mm
Slaving away still on GCR stuff ...
Avoiding the soaps ...
http://www.greatcentralmodels.co.uk

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Lord Colnago
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Re: Hornby B12

Postby Lord Colnago » Tue Jun 25, 2019 6:27 pm

Thanks John, that's handy to know.
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Philip Hall
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Re: Hornby B12

Postby Philip Hall » Tue Jun 25, 2019 8:23 pm

I’m not that familiar with steam engines from the East (as in Anglia) but I always thought that Alan Gibson did a B12 driving wheel. If so there is probably a set with the correct axle size available. If not, then assuming that the chassis has brass bearings they can probably be reamed out to 1/8”. Unless the Hornby axles are 2mm...

Turning the flange down on a Hornby wheel is not for the faint hearted. The tyres are quite nice, but the flange is in the wrong place for a P4 wheel unless you are able to turn nearly a millimetre off the front face. Now the plastic of these wheels is very tough indeed (I have had trouble with a piecing saw!) and turning the front face off will result in quite furry spokes which will need a lot of cleaning up. I believe it has been done but on my little Unimat SL I didn’t fancy the idea.

A positive goer though is to remove the Hornby tread and reduce the plastic centre to take a Gibson tyre. For this again you will require a lathe of sorts and a mandrel. The axle hole can be reamed out to take an appropriate axle, new axles made and the wheel pressed on in the usual way. I have seen this done recently in a Hornby Peckett and it worked well.

Philip

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45609
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Re: Hornby B12

Postby 45609 » Wed Jun 26, 2019 1:33 pm

Philip Hall wrote:A positive goer though is to remove the Hornby tread and reduce the plastic centre to take a Gibson tyre. For this again you will require a lathe of sorts and a mandrel. The axle hole can be reamed out to take an appropriate axle, new axles made and the wheel pressed on in the usual way. I have seen this done recently in a Hornby Peckett and it worked well.


Indeed it is possible. I’ve successfully re-tyred Hornby (BR standard 4MT 4-6-0) and Bachmann BR Standard 9F wheels. The latter was very time consuming but I feel the end, below, justified the means. A lathe, soft jaws, a couple of mandrels, patience and a can do attitude all played a part.

axle bore 5.jpg


Morgan


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