Video Archive         Recent Topics      
YMR logo

You are here:  Your Model Railway Club > The Prototype Photograph Archive. > Rolling Stock. - UK > Locomotives - Steam > Twobolt John`s 7mm GWR small prairie tank kit build. To bottom of page
                 

 Moderated by: Spurno
Start New Topic Reply Printer Friendly

Twobolt John`s 7mm GWR small prairie tank kit build. - Locomotives - Steam - The Prototype Photograph Archive. - Your Model Railway Club
AuthorPost
 Posted: Tue Sep 1st, 2020 06:52 pm
PMQuoteReply
link to this 1st post
Twobolt
Full Member


Joined: Fri Jan 2nd, 2015
Location: Hednesford, Cannock, United Kingdom
Posts: 141
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

Lockdown pushed me into another loco kit build. 
 Back in 2008 my first O gauge kit build was this Springside all whitemetal Prairie kit which I eventually sold on ebay as the white metal crossheads and pistons would never stand up to prolonged useage.






So, searching around during the early weeks of Lockdown for a replacement non-white metal Prairie kit led me to a Warren Shepard version which was the only one out of a potential three choices available to me at short notice.

This turned out to be somewhat of a challenge to build as the kit requires a fair bit of marking out by hand and then using a riveter on fairly thick brass etchings. Also, being very much a `kitchen table` modeller with a minimum of tools there was a fair amount of shaping and `rolling` of tank ends and boiler work.

A further `self imposed` challenge was preparing the kit for a sprung chassis using a set of early Slaters nylon hornblocks.


So, this is where I began my build sequence and also preparing the wheels by chemical blackening using Birchwood Casey products.



Then using the sprung hornblocks  as datum for accurately cutting out the chassis sides.



Then on to preparing all that is required to assemble the basic chassis structure using the coupling rods as jigs for accuracy.



Sadly, nylon does`nt solder too well and so the hornblocks are superglued in place using a fresh quality glue.



Warren Shepard kits are well known for  quality lost wax castings as shown by these front and rear bogie assemblies.

 An early challenge was shaping and soldering up the cylinder block unit.



Eventually a very strong chassis  takes shape..................................



Using the rods as datum for the axle position always assures a free running mechanism every time.



So, diverting on to the body build.  Warren provides about 25% of pre-etched riveting but the rest has to be done by the modeller.

Warren has produced printed paper rivet patterns that need to be glued to the back of the body sides and ends as riveting guides for you to use a riveter of your choice.

A major problem with this method  is that the paper plans do not accurately fit the body etchings so you willend up with rivet patterns in the wrong positions.

I found it much more effective by copying the plans by hand and marking out the rear of the etchings just like scratch building.

and it only took me one evening at the kitchen table.................


The kit has no slot and tab method of assembly so superstructure assembly has to be slow and steady using at least an 80watt soldering iron to cope with the substantially thick brass.

Warren supplies a great deal of photographic prototype references and a diagrammatical booklet to follow but no written instructions




There are rear bunker corner castings which I preferred to modify for my build and the next challenge is to form bends at both front and rear of the tank sides that will sit accurately into etched positions on the footplate section.




There is a very satisfying set of etchings for the inside of the cab.






After that it is the long slog of adding all the detailing







Until eventually you can return to the chassis build once again.



Blacken everything that moves and put it all together. I always use Slaters plunger pickups for which I marked out and pre-drilled the chassis.

Taking care with the wiring to avoid any electrical shorts. (ready for DCC)




Then eventually a fully running chassis turns up....




Then it`s on with the lid and of for a quick non-powered ( cos the trackwork` s got paint on ) push through the pointwork to make sure everything is good to go.



as you can see I did this before I blackened everything up....

Then  add the final bits ready for the paint shop.



Then into and out of the paint shop..........................................................................................................................



A good dose of quality etch primer.









Now waiting for number plates , sand pipes, weathering of motion.

But she does have working cab side sheets.


Mid 1930`s livery and condition.











____________________
Twobolt John
Back To Top PMQuoteReply

 Posted: Tue Sep 1st, 2020 09:03 pm
PMQuoteReply
link to this 2nd post
BCDR
Moderator


Joined: Sat Oct 19th, 2013
Location: Reston, Virginia USA
Posts: 3501
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

Nice.

Nigel



____________________
©Nigel C. Phillips
Back To Top PMQuoteReply

 Posted: Thu Sep 3rd, 2020 10:58 am
PMQuoteReply
link to this 3rd post
georgejacksongenius
Kettle Watcher


Joined: Thu Feb 28th, 2008
Location: Hyde,Cheshire, United Kingdom
Posts: 2414
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

Beautiful loco!!!
Cheers,John.B.:thumbs

Back To Top PMQuoteReply

 Posted: Sun Sep 6th, 2020 12:25 pm
PMQuoteReply
link to this 4th post
Petermac
Moderator


Joined: Sat Oct 13th, 2007
Location: Nr Bergerac, France
Posts: 17592
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

Wow - that looks excellent John and a decent visible scale too to show off all that work.  You make it sound so easy .............................
Can you solder blackened brass OK or do you have to scrape back to pure brass first ?



____________________
'Petermac
Back To Top PMQuoteReply

 Posted: Sun Sep 6th, 2020 03:15 pm
PMQuoteReply
link to this 5th post
Twobolt
Full Member


Joined: Fri Jan 2nd, 2015
Location: Hednesford, Cannock, United Kingdom
Posts: 141
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

Thanks Peter,
No not possible to solder blackened brass without scraping first ,even with Bakers Fluid flux.



Any how, still awaiting arrival of the number plates, here is a final sound bite as she`s now ready to play with.

https://www.youtube.com/watch?v=baTUxIqUR9o



____________________
Twobolt John
Back To Top PMQuoteReply

 Posted: Sun Sep 6th, 2020 07:01 pm
PMQuoteReply
link to this 6th post
Petermac
Moderator


Joined: Sat Oct 13th, 2007
Location: Nr Bergerac, France
Posts: 17592
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

That's really good - I love them with sound.   :thumbs  Is that one of Paul Chetter's projects or a Digitrains generic ?  Whatever, it's very good.



____________________
'Petermac
Back To Top PMQuoteReply

 Posted: Tue Sep 8th, 2020 05:48 am
PMQuoteReply
link to this 7th post
Chubber
Casseroled Badger


Joined: Thu Oct 2nd, 2008
Location: Ivybridge, Devon, Gateway To Dartmoor.. , United Kingdom
Posts: 4786
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

Real miniature engineering. I'd be proud to achieve this standard of work!

Douglas



____________________
'You may share the labours of the great, but you will not share the spoil...' Aesop's Fables

"Beer is proof that God loves us and wants us to be happy" - Benjamin Franklin

"In the land of the slap-dash and implausible, mediocrity is
Back To Top PMQuoteReply

 Posted: Thu Sep 10th, 2020 01:48 am
PMQuoteReply
link to this 8th post
Ssamm
Full Member
 

Joined: Sun Dec 3rd, 2017
Location: Bribie Island, Queensland, Australia
Posts: 106
Status: 
Offline

My photos:
view photos in Gallery
view photos as slides

Great work, with lots of patience I'm sure

Cheers
Evan

Back To Top PMQuoteReply

This is topic ID = 16479     Current time is 09:55 pm  
You are here:  Your Model Railway Club > The Prototype Photograph Archive. > Rolling Stock. - UK > Locomotives - Steam > Twobolt John`s 7mm GWR small prairie tank kit build.
You can type a quick reply to this topic here. Click in the box below to begin.

Or to reply to an individual post, or to include images, attachments and formatted text,
click the Quote or Reply buttons on each post above.

To start a new topic in this forum, click the Start New Topic button below.
To start a new topic in a different forum, click the Forum Jump drop-down list below.
Start New Topic


Back to top of page

           
15 Most Recent Topics

Problems with this web site? Please contact the Webmaster.

All material submitted to this web site is the responsibility of the respective contributor. By submitting material to this web site you acknowledge that you accept full responsibility for the material submitted.
Unless stated otherwise, all the material displayed on this web site, including all text, photographs, drawings and other images, is copyright and the property of the respective contributor. Registered members are welcome to use it for their own personal non-commercial modelmaking purposes. It must not be reproduced or re-published elsewhere in any form, or used commercially, without first obtaining the owner's express permission.
The owner of this web site may edit, modify or remove any content at any time without giving notice or reason.    © 2008

                 

Recent Topics Back to top of page

Powered by UltraBB 1.15 Copyright © 2007-2011 by Jim Hale and Data 1 Systems. Page design copyright © 2008-2013 Martin Wynne. Photo gallery copyright © 2009 David Williams.