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Author Topic: SR Lord Nelson possible 3D print  (Read 3931 times)

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Offline Snowwolflair

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Re: SR Lord Nelson possible 3D print
« Reply #90 on: June 09, 2019, 03:43:06 PM »
Probably best to avoid the Drummond 4-6-0s, the T14 was the only one approaching successful after rebuilds and that had part of the valve gear above the footplate, can't think of a suitable chassis for that!

http://www.semgonline.com/steam/t14class_01.html


The bigger problem is the inside frame cart tender.  the mechanism is only going to work with the bogie type (at this stage).

Offline Dorsetmike

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Re: SR Lord Nelson possible 3D print
« Reply #91 on: June 09, 2019, 03:46:08 PM »
If we're getting into wish lists then I want an Adams A12 "Jubilee" 0-4-2.



(Union Mills tender drive)
« Last Edit: June 09, 2019, 03:47:18 PM by Dorsetmike »
Cheers MIKE
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Offline Bob G

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Re: SR Lord Nelson possible 3D print
« Reply #92 on: June 09, 2019, 03:50:17 PM »
I thought this thread was about useful locos.
Like proper Maunsell and Urie types.
Not locos that should never have been built!

Iím talking about the Drummond 4 6 0s btw.
« Last Edit: June 09, 2019, 03:51:50 PM by Bob G »

Offline Snowwolflair

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Re: SR Lord Nelson possible 3D print
« Reply #93 on: June 09, 2019, 03:51:37 PM »
If we're getting into wish lists then I want an Adams A12 "Jubilee" 0-4-2.



(Union Mills tender drive)


You could look at a 14xx chassis, however the motor may not fit in the firebox assuming the wheels are the correct size and spacing.  Also the tender is too shallow for a Union Mills tender drive.  My guess is it would require a custom chassis which is another level of complexity.

Offline Dorsetmike

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Re: SR Lord Nelson possible 3D print
« Reply #94 on: June 09, 2019, 04:45:41 PM »
Well UM do the Adams 0395 class 0-6-0 many of which had the same tender; the A12s had a number of different tenders over the years. The 14xx only has 5'2" drivers the A12 has 6'

This is my attempt in brass with a UM drive, currently in the shops getting improved fitting and better axle boxes for the the pony wheels; the tender does have a good load of coal tho'.
« Last Edit: June 09, 2019, 04:49:55 PM by Dorsetmike »
Cheers MIKE
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Offline CarriageShed

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Re: SR Lord Nelson possible 3D print
« Reply #95 on: June 09, 2019, 05:17:13 PM »
Ever since I saw Mike's attempt I've wanted an A12 too.

As for the Paddlebox, Urie rebuilt them, and Maunsell did so again around 1930. I was wondering whether a compromise could be reached with the above-the-footplate valve gear - could a static mock-up work with the only moving parts kept below the footplate, and perhaps even away from the cylinders if that's how it has to be...?


Offline Snowwolflair

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Re: SR Lord Nelson possible 3D print
« Reply #96 on: June 09, 2019, 05:20:11 PM »
Ever since I saw Mike's attempt I've wanted an A12 too.

As for the Paddlebox, Urie rebuilt them, and Maunsell did so again around 1930. I was wondering whether a compromise could be reached with the above-the-footplate valve gear - could a static mock-up work with the only moving parts kept below the footplate, and perhaps even away from the cylinders if that's how it has to be...?




What we need is a member who can make chassis and etches for valve gear. :)

Offline Snowwolflair

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Re: SR Lord Nelson possible 3D print
« Reply #97 on: June 09, 2019, 05:22:59 PM »
Ever since I saw Mike's attempt I've wanted an A12 too.

As for the Paddlebox, Urie rebuilt them, and Maunsell did so again around 1930. I was wondering whether a compromise could be reached with the above-the-footplate valve gear - could a static mock-up work with the only moving parts kept below the footplate, and perhaps even away from the cylinders if that's how it has to be...?




What we need is a member who can make chassis and etches for valve gear. :)


Static valve gear is always possible, few models have anything like real valve gear anyway.   It would be better to add it as etched parts even if they are static as you will never paint them to look correct.

Offline CarriageShed

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Re: SR Lord Nelson possible 3D print
« Reply #98 on: June 09, 2019, 05:35:49 PM »
What we need is a member who can make chassis and etches for valve gear. :)

In that case Nick at N Brass Loco would be a good chap to try. He's pretty responsive and already has a vast range of loco parts.

Offline Snowwolflair

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Re: SR Lord Nelson possible 3D print
« Reply #99 on: March 29, 2020, 01:58:02 PM »
OK back to the CAD for the Lord Nelson.  The tender drive works and it now needs a loco body.



I have started with the basic shapes for the firebox and boiler, but there is a long way to go.  NB the firebox base has not been cut back to the plate line yet.





Offline Dorsetmike

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Re: SR Lord Nelson possible 3D print
« Reply #100 on: March 29, 2020, 02:41:11 PM »
What chassis have you used, my first Nelsons were hacked Peco jubilees with scratch built tender on a Rivarossi NORD chassis, more recent ones are being hacked Scot or Jubilee loco with UM drive under a BHE N15 Urie tender. Two reasons for change in tender, first ones were for post 1938 layout, I've since changed to mid 1930s, also there's not anything I can find to do with  Rivarossi NORD loco, even If I could find one on Ebay.

First one, hacked Peco Jubilee and brass tender on Rivarossi NORD drive
Cheers MIKE
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Offline Snowwolflair

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Re: SR Lord Nelson possible 3D print
« Reply #101 on: March 29, 2020, 02:45:28 PM »
At this stage I'm using a Royal Scot, however until I complete the basic CAD I wont be able to match it up to my satisfaction.  When I did the Great Bear I moved the rear axle on the Castle chassis.

Offline Snowwolflair

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Re: SR Lord Nelson possible 3D print
« Reply #102 on: March 29, 2020, 03:09:21 PM »



Offline Stevie DC

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Re: SR Lord Nelson possible 3D print
« Reply #103 on: March 30, 2020, 09:12:02 PM »
Great stuff there! A word of caution about Roche drawings, they are not always accurate (a product of their time) and I would recommend as many photos of the prototypes as possible to double check details.

Offline Snowwolflair

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Re: SR Lord Nelson possible 3D print
« Reply #104 on: March 30, 2020, 09:15:48 PM »
Yes, I have three sets of drawings and they are all different so quite a lot of interpretation needed from photos.

 

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