Andrew's 3D print builds

A full kit of parts to build on a Bachmann Mk1 chassis.....

 

 

 

These are the 2 body halves,..

 

 

 

 

 

 

the 3 underbody tanks and a set of bogie sides...

 

 

 

 

 

 

The bogie sides will be glued onto the side of the existing donor bogies which will require the detail on those to be sanded back to as this and flat as possible without impacting the axle mounts/bearings....

 

The prints are cleaned up and the joining edges check to ensure the best fit. They are printed with tabs to aid glueing together.

Edited June 23, 2022 by LMSfan72

From this point on it's pretty simple to put together. The steps are:

 

- glue the body and sand, fill and prime....

- Remove the bogies form the donor and flatten the sides to take the new bogie sides

- remove the appropriate underbody detail and end detail from the donor chassis

- glue the new detail into place

- prime and paint

- fit glazing to the body (using a tinted film)

- apply transfers (once again, Steve at Railtec came up trumps to make the transfers for the current version of the protoype)

 

....  I am going to set myself a challenge to adapt this one further with interior and lighting................

So, I have been thinking about the interior and lighting and came up with a plan. I was so impressed with the pick-ups on the Bachmann Mk2F coaches that I thought I'd see what similar designs Bachmann had. I picked up a pair of Bachmann Thompson bogies, 36-006B, which has the same pick up design. Since I will need to change the bogie sides anyway the style is less relevant. The wheels are quite a lot bigger so a redesign to now include a chassis and bogie mounts is required. I will also have to devise coupling arrangements so I will try and go with Keen Systems like I did on Mentor. At the same time, then, I'll do the interior and add the corridor ends.....

 

 

Edited June 23, 2022 by LMSfan72

Soooooo pleased with this print. This is the 3 pieces just pushed together, straight out of the cure machine with no finishing. You can barely see the join at all...

 

Edited June 23, 2022 by LMSfan72

On 03/12/2021 at 03:43, LMSfan72 said:

Soooooo pleased with this print. This is the 3 pieces just pushed together, straight out of the cure machine with no finishing. You can barely see the join at all...

Looks lovely as always! I’ll be definitely getting one when they are back on the popular auction house! 

Edited June 23, 2022 by LMSfan72

I airbrushed the interior before glueing the two halves together (I actually cut some access squares in the bottom of the body halves where the centre chassis will go - it struck me that I struggled with light bleed on some others so I thought I'd try an help to minimise that as well as getting a uniform interior). I suspect the light pigment and thin paint might not do a great deal though!

 

Then I glued it and primed to see what needed finishing. Not much, really!

 

 

 

Edited June 23, 2022 by LMSfan72

I disassembled the Thompson bogies and cut most of the detail away from them. I then flatted the sides back (the great thing about these is that the pickup frame acts as the bearing so if you go too far and this it so that the axle hole appears they should still work) so that they were about 1mm thick.

 

I then took the printed sides and glues them to the outside. I used glue'n'glazre rather than superglue so if I find the positions a bit wrong I can get them off and re-position....

 

 

...and reassembled...

Edited June 23, 2022 by LMSfan72

I then did a bit of mix and match on the body colour. After the grey Halfords primer I then airbrushed white Vallejo surface primer to get it back to white. Mid coat was then Vallejo chrome yellow. A couple of coats of that. That colour is a pretty good match for the prototype I think (this shade of Vallejo is RAL1003). However, I wanted to match my Hornby coaches as best I could, so, I find a top coat from a rattle can of Halfords Rover Inca Yellow gets me pretty close... I'll get a picture side by side when it's dry!

Edited December 3, 2021 by LMSfan72

Here's colour comparison with Hornby 72631 PLPR1...

 

 

...and a quick shot of 999602 mocked up on it's bogies....

 

Edited June 23, 2022 by LMSfan72

Now, turning my attention to the lights.... I want to model operating "tube" lights as on the prototype. The only way I could think of doing this was to create a strip of SMD LEDs close together. Looking at the length, it seems to be 6 LEDs end to end. I plan to solder them together in 2 strings of 3, each string with a 470 ohm resistor. I think this will work nicely with them wired in parallel on a single function of the DCC decoder.

 

I made myself a little jig to help solder the LEDs together and once removed from the jig I then painted them white and "filled" the gaps with glue'n'glaze..

 

 

 

 

Testing shows they still shine brightly, so, fealing quite happy so far!

 

 

Edited June 23, 2022 by LMSfan72

Installed the side lights...

 

 

Edited June 23, 2022 by LMSfan72

The interior ready to go in...

 

 

..Next I'll glaze it and then wire in the flood light LEDs..

Edited June 23, 2022 by LMSfan72

All the lights wired up and plugged into the test rig decoder.

 

We have

 

• an interior lighting strip,
• the tube lights on each side,
• eight spot/flood lights at the 4 corners of the bogies

 

Just the bogies to wire in then the decoder. I need to work out what clearance there is above the bogie wires between the floor and the interior....

Edited June 23, 2022 by LMSfan72

I have wired in the bogies and all the lights to a Zimo function only decoder. I made up a resistor board that I can access under the fuel tanks - I will make the chassis centre section removable with a screw.

 

 

 

The decoder and a stay alive went into the generator end. Really getting there now!

 

 

 

I have test run it all on the track to check the couplings and bogies are all free. I was concerned about buffer lock but using number 19 Kadee coupling on the loco work. When I put the rake together I will probably use a rigid connector. All that remains is to fix in the coach ends (they need a little fettling as they are too tight a fit) and then final paint details and decals.

Edited June 23, 2022 by LMSfan72

Here we go, finished coach fresh from the detailing shop:

 

 

 

 

Edited June 23, 2022 by LMSfan72

 

Edited June 23, 2022 by LMSfan72

Splendid.

I just changed printers and now can produce a one piece body section. Pleased with this, fresh off the printer/cure station:

 

Oops. One half of the CAD model is flipped so I’ve got the windows on the wrong side. That’ll be fixed and reprinted…!

Lovely work using these prints here:

 

 

Out of curiosity, would the body fit onto a Bachmann MK1 SK frame?

I originally did make it for that. Since then, though, I modified the prints to incorporate the bogie mounts so no donor was actually needed. The models have been through so many iterations I’m not sure it’s straightforward to go back!

 

I’m now working on 62287 UTU2 and then 62384 UTU1….

20 hours ago, LMSfan72 said:

I originally did make it for that. Since then, though, I modified the prints to incorporate the bogie mounts so no donor was actually needed. The models have been through so many iterations I’m not sure it’s straightforward to go back!

 

I’m now working on 62287 UTU2 and then 62384 UTU1….

I will definitely keep an eye out for 62384, another model I would like to build 👍

Rendition of the 3D models of 62287