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Author Topic: Dr Al's workbench - V1, V3  (Read 40539 times)

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Offline Dr Al

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #30 on: July 01, 2015, 09:35:45 am »
Having compared my K3, built with a modified version of the originally intended V2 chassis, you can really see that difference in the rear part of the coupled wheelbase. That extra 1.5mm length really makes a big visual difference. If I needed any more encouragement to build at least one more using this method, I think I got it!

To me the big difference (and one I aim to avoid as it ruins many N gauge kitbuilt models) is that the V2 based model's body sits way too high - it's a bit up on stilts.

My aim was to get the body down low, as close to matching up with the tender footplate as was viable.

To me the wheel spacing is secondary to this as the first thing that stands out to me.

Cheers,
Alan
Quote from: Roy L S
If Dr Al is online he may be able to provide a more comprehensive answer.

Offline Dr Al

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #31 on: July 01, 2015, 09:36:48 am »
I can see me building one of these now.

I'll happily claim any commission on sales Steve generates after seeing mine  :P  :P  :P  :P

Cheers,
Al
Quote from: Roy L S
If Dr Al is online he may be able to provide a more comprehensive answer.

Offline Atso

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #32 on: July 01, 2015, 10:19:59 am »
I'll happily claim any commission on sales Steve generates after seeing mine  :P  :P  :P  :P

Hate to tell you, but I've had a B1 in bits for several years pending me actually getting on with this!  :P :P :P Thanks for proving the concept though (I might throw a certain loco body your way at some point)!  ;) As for sales, I can't see me wanting to file down and fettle several chassis and valve gear (one or the other maybe!), although I might have a solution to this...

Some modest investigation suggests that the boss on the back of modern Dapol and Farish wheels are nominally the same size. Maybe this opens up the possibility of a Dapol B1 conversion for those wanting loco drive, or even for some other classes sharing that coupled wheelbase? I would have thought that a suitable 20 tooth gear would have to be found to fit a Farish Fairburn wheelset though (plus the dread of having to take Farish wheels off their axles and get them back on again!) - I haven't checked but I doubt that Farish and Dapol use the same MOD size for gears.

Will have to investigate further but need to tidy up from building a signal box. OT but believe it or not, I found some baseboards and the start of track laying when I started this last night!   :o :o :o

Offline Newportnobby

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #33 on: July 01, 2015, 10:30:40 am »

Stunning, totally stunning

Wot he said. I stand (or at least sit) in awe, Alan :goggleeyes:

Offline Atso

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #34 on: July 01, 2015, 10:47:44 am »

Stunning, totally stunning

Wot he said. I stand (or at least sit) in awe, Alan :goggleeyes:

Completely agree!

Offline Dr Al

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #35 on: July 01, 2015, 11:25:49 pm »
Tonight's progress might not look much different, but all the black central lining is now done, apart from the loco footplates. Other side of the loco finished out too apart from this and one RA number.





Cheers,
Alan
Quote from: Roy L S
If Dr Al is online he may be able to provide a more comprehensive answer.

Offline R Marshall

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #36 on: July 02, 2015, 12:11:20 am »
Very Nice!

Offline Atso

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #37 on: July 02, 2015, 09:12:31 am »
Tonight's progress might not look much different, but all the black central lining is now done, apart from the loco footplates. Other side of the loco finished out too apart from this and one RA number

Looks great Alan! The cream lining is next?  :D (I'll get my coat!  :-[)

Offline paulprice

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #38 on: July 02, 2015, 09:13:51 am »
Tonight's progress might not look much different, but all the black central lining is now done, apart from the loco footplates. Other side of the loco finished out too apart from this and one RA number.





Cheers,
Alan


Im lost for words, BR lined black.............. I suppose one or two additions to my fleet would not hurt, of course just in case a friend needs to borrow a loco

Offline Jonny

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #39 on: July 02, 2015, 09:45:13 am »
I definitely feel a lner lined one coming on now

Live each day as if it's your last

As one day you may be right.




Carlisle to Silloth. 1854-1964
http://en.m.wikipedia.org/wiki/Carlisle_and_Silloth_Bay_Railway

Offline Jonny

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #40 on: July 02, 2015, 10:04:56 am »
I definitely feel a lner lined one coming on now

Picked up a dapol b1 for next to nothing yesterday. 
Now do I keep it as b1 or convert
Live each day as if it's your last

As one day you may be right.




Carlisle to Silloth. 1854-1964
http://en.m.wikipedia.org/wiki/Carlisle_and_Silloth_Bay_Railway

Offline Atso

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #41 on: July 02, 2015, 10:20:53 am »
I definitely feel a lner lined one coming on now

Picked up a dapol b1 for next to nothing yesterday. 
Now do I keep it as b1 or convert

Hi Jon, if you're looking to use the Dapol B1 for a K3 then you'll really need a wheel swap. The Farish B1's driving wheels scale out at about 5'10 (against the K3's 5'8) while the Dapol B1 is slightly over (I think) the prototypes 6'2 drivers. Most certainly the Dapol B1s wheels are bigger than the Farish equivalent. Most of my cheap Dapol B1's are in the process of being turned into various tender driven 4-4-0s due to the lovely 9' wheelbase are the back end.

Offline Jonny

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #42 on: July 02, 2015, 11:01:48 am »
Cheers for that Steve.

I may  just line it out as a lner b1 then

What are these 4-4-0's you talk about
Live each day as if it's your last

As one day you may be right.




Carlisle to Silloth. 1854-1964
http://en.m.wikipedia.org/wiki/Carlisle_and_Silloth_Bay_Railway

Offline Atso

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #43 on: July 02, 2015, 11:37:05 am »
Cheers for that Steve.

I may  just line it out as a lner b1 then

What are these 4-4-0's you talk about


No problem Jonny, once the Dapol Grange comes out it might be possible to do a wheel swap with that to get closer to scale driving wheels.

My two, long term, projects are some D2s and a D16/3 (since released by Union Mills). Both use chopped up B1 loco chassis minus the worm gears which is still a bit of a squeeze into these bodies. It could be possible to use the Dapol drive arrangement of tender mounted motor driving the loco's driving wheels but all of my cheap B1s have shown a tendency to slip their gears which apparently is a weakness in the design (I believe Dr Al has a fix for this and maybe he'd show us how he does it one day). I've currently got no cab detail in any of these but this might be possible with some more chopping up of the chassis.

A rather old picture of where I was before I damaged the Shapeways bodies (still to print replacements):



The D16/3 has been retrofitted with Dapol A3 driving wheels while the D2 (from memory) was a little too tight in clearances to do this. The D2s may well make a reappearance in my own thread in the not too distant future.

A quick look through my references show that the following LNER 4-4-0s had a 9' coupled wheelbase:

GNR:
D1, D2

GCR:
D5, D6

GER:
D14, D15, D16 (all variants of the same basic class i.e. rebuilds, etc)

NBR:
D27, D28, D31

I have no idea if the B1 chassis could be used for any of the GCR or NBR classes as I don't have drawings but the coupled wheelbase is correct.

Sorry for hijacking Alan's awesome K3 thread!

Offline Jonny

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Re: AtsoCad LNER Gresley K3 2-6-0
« Reply #44 on: July 02, 2015, 12:12:45 pm »
Lovely looking 4-4-0's

I'll check the nbr wheel Base measurements

Cheers

Jon
Live each day as if it's your last

As one day you may be right.




Carlisle to Silloth. 1854-1964
http://en.m.wikipedia.org/wiki/Carlisle_and_Silloth_Bay_Railway

 

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