Jump to content

CF MRC

2502 Hyperion A3 3.5” gauge

Recommended Posts

Posted (edited)

This 3.5” gauge A3  was recently offered for sale by the Steam Workshop.

 

DF1EE18F-C018-49C4-B1DA-782F88A3CA47_zps

 

Consensus from the learned came down to one of the last batch of A3s and of these, I have chosen 2502 ‘Hyperion’ to fit most aspects of the model’s condition; name plates are now on order. It rather elegantly graces a window sill at home. 

 

C1A03249-3055-42B6-95E2-4EBB8461A1D9_zps

 

The engine is very well made / engineered and should run well at the NLSME tracks at Colney Heath (as soon as life becomes more normal).  However, it has quite a lot of features that can be improved, especially around the cab area. This is about 4mm too tall, originally because the manifold and fittings were too high. It’s also a bit wide and the firebox a bit narrow, but that may be trickier to modify. The manifold has now been lowered and so some surgery will be made to the bottom of the cab, amongst other things.  There will be many other area where I think the engine can be improved and detailed: it is a bit plain. 

 

0B7D0B10-A65D-46A0-BC85-B2A0F04DD342_zps

 

Should provide a bit of distraction in these strange times: some show track and a rolling road is a priority.


Tim

Edited by CF MRC
  • Like 5

Share this post


Link to post
Share on other sites

I think you may need to put the one from Copenhagen Fields on the footplate and photograph the two together.

 

"If I eat all my coal, one day I may grow up into this".

 

She looks lovely Tim.

Share this post


Link to post
Share on other sites

Hi Tim

 

Great to see you posting plans/progress on your A3 here, I shall be following it with great interest... hopefully when things return to normal I'll get to see her at the NLSME track....have fun...

 

Pete

Share this post


Link to post
Share on other sites

I’ve spent the last few days making some display track for Hyperion.  Supplied by the Miniature Railway Supply Co. the concept is very good, but quite labour intensive. 
946F5A77-294F-44FB-A03C-C9AB8F9370F4.jpeg.f6f1ad7f06cf2cd1f7df1a1a6e1156d0.jpeg

4E9EA5F8-1078-4608-AA5C-3BB0A07E4923.jpeg.43f44b3b129d4016827f5cabbdbb8d35.jpegQuite interesting applying model railway weathering techniques at such a large scale. 
 

Tim

  • Like 7
  • Craftsmanship/clever 3

Share this post


Link to post
Share on other sites
Posted (edited)

Papyrus now looks the part on some proper track.

C9B33D16-6607-47EF-8BE5-6C58AAAF3AD3_zps

 

For comparison, we have Papyrus from Copenhagen Fields on the running plate.

200A241D-1E25-436F-8158-9CE00A1BD767_zps
 

The dome on the model is incorrect for Papyrus, indeed any pre-war A3,  as it is of the streamlined type. 
D24F9D0B-87C3-4E1B-94C7-A025FFFF51AB_zps

 

As this engine is going to become Hyperion, I sourced a pre-war, proper banjo dome casting from Blackgates. 
030F71C3-54B5-4AF4-8C31-86CC1B46C40E_zps

 

Inside this lump of gunmetal was the correct shape trying to get out.

5316E6F5-79A2-4C7F-B681-F99554C547AD_zps
 

A little BLack and Decker 1/2” belt sander proved to be useful for fettling the casting, which has some interesting geometry interacting with the cone of the boiler.  Making it fit was tricky as I didn’t want to cause more damage to the paint than was necessary - it will be touched-in for the time being.  I really much prefer the appearance of this dome, I think it has an elegance about it.

BE6FFED9-EE06-4774-906A-0734F57E3212_zps

 

Tim

Edited by CF MRC
  • Like 5
  • Craftsmanship/clever 4

Share this post


Link to post
Share on other sites

The dome has now been painted (only brush finished) and fitted.  The engine will eventually be completely re-sprayed when I have finished modifications to it and so I’ll be able to improve the fit at that time.  
05F0D6DC-2EFE-40AA-9175-E23BDD9CF056_zps

I made up the rolling road yesterday (from the Model Engineers Laser).  A very substantial piece of kit.  The engine was lined up on it in the kitchen as that is closest to where it lives at the moment.  I will have to get a lifting  trolley to shift her as her weight is not trivial. 
26C89D91-7770-4A16-B098-B7DCE1CFF340_zps
I now need to make some bits and pieces to enable her to steam - shovel, poker, blower chimney adaptor etc. 
 

Tim

  • Like 6

Share this post


Link to post
Share on other sites

I had the A3 in steam today on a rolling road for two hours.  Quite a learning curve keeping a small engine in steam. She runs well and I’m beginning to work out what sort of fire works best.  There is are a few areas need investigation for slack and wear, but one step at a time. 
26572AB1-EDCF-4B9F-9EEE-6F58E83B85E1_zps

https://youtu.be/DF2R_LoT_to

 

Tim

  • Like 8

Share this post


Link to post
Share on other sites

I think the loco inspectors will be very happy with the lack of wobble at high speed. Just like a full sized A3!

  • Like 3

Share this post


Link to post
Share on other sites

I’ve been doing a lot of work on the cab and firebox these last few days, so she is really beginning to look like a proper A3. 
 

Tim

  • Like 2

Share this post


Link to post
Share on other sites

The cab on the A3 has been lowered by 3/16” and the firebox widened by the same amount on each side.  I think she now sits like an A3 at the back, especially when compared with the original condition which was much too lofty and skinny on the firebox. 

 

Holes have been made for the missing washout plugs and mud hole doors at the bottom of the boiler.  The ash pan should have some large brackets on either side of it, front and middle.  The roof ventilator will be replaced by a more accurate representation at half the height and the rain strips moved to the correct position.  Further detailing at the cab end e.g. spectacle windows, will wait until this is stripped to bare metal for repainting and numbering.   A lot of lining out is to be reinstated as a temporary trial of techniques before that. 
73F68C6A-4B03-4A05-B84A-E3F0DB3A8B9D_zps

A3AAD59F-1129-4B3E-BD90-DAA3717D208A_zps

 

She fits the work bench well and also has the advantage of being easily lifted, turned over and generally manoeuvred for working on.  Quite nice to be able to work on something with just reading glasses. 

1CDE16B5-8459-4C23-A910-C1F2097A22FA_zps

 

Tim
 

  • Like 9

Share this post


Link to post
Share on other sites
Posted (edited)

The lining out around the cab and firebox on the A3 has progressed quite quickly using an ‘easi-LINER’ pen. These are tube capillary flow-type pens that take un-thinned gloss enamel paints. In sizes 0.25, 0.5, 0.75 and 1.00 mm they are easily fine enough for a 3/4” scale model.  They work well in this size and are much quicker and more versatile to use than a bow pen over the distances to be covered.  
 

The washout plugs were first lined out freehand in white: these can be quite thick lines as the black will be use to reduce the line thickness. In fact, of course, the white lines are grey as this produces a much less prominent line. 

E0036592-9E39-458D-89AC-7212DE2C0BAC_zps

 

The pen was used to follow suitable edges to back fill the black lines and the set can use an edge follower where appropriate.

290F388A-6A32-4EDC-8C64-3984D715F41B_zps
 

The extra lining has really made the back of the engine much busier. The finish is OK, but is hampered by the relatively rough paint work beneath, especially where I have made the modifications to the body work.  On final assembly, I will make some adjustments to the line weight and evenness.   I will probably also make greater use of templates when I do the definitive re-paint.  
9C85ABF1-31C2-4E37-9D28-E8190B39F7C8_zps

 

The last remaining lining will be the boiler band immediately in front of the cab.  This will actually be made as two separate pieces, joined with a nut and bolt at the top: you can’t do that in 2mm scale!

 

Tim

 

Edited by CF MRC
  • Like 4

Share this post


Link to post
Share on other sites

The last boiler band was made from 8 thou brass strip, painted with Plastikote gloss black. This is actually a good heat resistant paint but also flexible.  A 12BA clearance hole was drilled at one end and it was then both taped down and a 0.5mm line drawn on one side.  
8034DBB6-D3EE-46AA-A0DB-A4527925314D_zps


Once the paint was hardened the end with the hole was bent at 90 degrees and the other end formed into a hook to engage with the firebox cleading at the  bottom.

EED41BC7-1CA6-4A2F-8141-373F65CBB29D_zps

 

At the top, the 12BA nut and bolt tightened the band onto the firebox - 12BA is the biggest screw size I use in 2mm scale...

3A2A7D89-CBDB-4EC5-BF55-402A0354BD4F_zps

 

The end result looks a lot tidier. 
E1665BF4-0B0E-40FF-BB12-94BDAE9537F5_zps

 

The engine and tender line up correctly now, do you think it looks more like an A3 now?

0E7261B0-25A8-4132-A8CD-CFFD3299DEA2_zps

 

Tim

 

  • Like 8

Share this post


Link to post
Share on other sites

Looks very much like an A3 to me Tim... nice work.

 

Pete

Share this post


Link to post
Share on other sites

Not much to show for it, but the front bogie wheels have been re-painted and lined on the A3.  The driving wheel rims also need re-painting to be more accurate.  There is a very attractive evening light that bounces off the far side glass in the room to light up the valve gear.

CC4BA740-C318-47F2-88E9-CD4E9DD1C66B.jpeg.1301d32e12e121359bb3c73cdedbaf92.jpeg

Tim

  • Like 5

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.