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Author Topic: Peckett OQ - the Mardy Monster  (Read 1593 times)

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Offline mk1gtstu

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Re: Peckett OQ - the Mardy Monster
« Reply #15 on: February 22, 2020, 04:31:18 PM »
That looks great @maridunian  :thumbsup: I will be following this with interest, May have to invest in one of these bodyshells & maybe another Peckett for my new colliery layout build. Assuming the old Minitrix chassis can be converted to run on DCC?

Cheers, Stu
My Box File Layout (South Wales Valleys Colliery) http://www.ngaugeforum.co.uk/SMFN/index.php?topic=10430.0

Porthkerry (A South Wales layout in BR Blue) http://www.ngaugeforum.co.uk/SMFN/index.php?topic=39654.0
 
Abercwm Colliery (South Wales Area) https://www.ngaugeforum.co.uk/SMFN/index.php?topic=47521.0

Offline maridunian

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Re: Peckett OQ - the Mardy Monster
« Reply #16 on: February 22, 2020, 11:31:35 PM »
Hi Stu

Apparently, yes:

https://www.ngaugeforum.co.uk/SMFN/index.php?topic=24696.0

Power is collected via axles from one side and wheels/wipers on the other. It's presented to the motor as two wires, which could (as much as I understand DCC) be presented to a chip instead, the chip then driving the motor through its outputs.
There's certainly more room in this saddle tank than the Minitrix bodies.

When it's releasable, I hope you fancy having a go.

Mike
My layout: Mwynwr Tryciau Colliery, the Many Tricks Mine.

My 3D Modelshop: Maridunian's Models

Offline mk1gtstu

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Re: Peckett OQ - the Mardy Monster
« Reply #17 on: February 23, 2020, 09:44:55 AM »
Hi Stu

Apparently, yes:

https://www.ngaugeforum.co.uk/SMFN/index.php?topic=24696.0

Power is collected via axles from one side and wheels/wipers on the other. It's presented to the motor as two wires, which could (as much as I understand DCC) be presented to a chip instead, the chip then driving the motor through its outputs.
There's certainly more room in this saddle tank than the Minitrix bodies.

When it's releasable, I hope you fancy having a go.

Mike

Ok, thank you for that, I'm new to DCC & don't have any locos converted to run on it yet but I'm building the colliery layout with DCC in mind. Yes, I think 1 or 2 of those little engines will be future projects for me. I think they look the part  :thumbsup:

Cheers, Stu
My Box File Layout (South Wales Valleys Colliery) http://www.ngaugeforum.co.uk/SMFN/index.php?topic=10430.0

Porthkerry (A South Wales layout in BR Blue) http://www.ngaugeforum.co.uk/SMFN/index.php?topic=39654.0
 
Abercwm Colliery (South Wales Area) https://www.ngaugeforum.co.uk/SMFN/index.php?topic=47521.0

Offline maridunian

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Re: Peckett OQ - the Mardy Monster
« Reply #18 on: February 23, 2020, 09:41:00 PM »


Parked between a B2 and my 0-4-0 Pecketts, the monstrous proportions of the OQ are clear.

List of tweaks now being compiled. Most obvious include shortening the steps to make them less vulnerable and stretching and moving back the cylinders a little. I'm trying to devise a way the body can clip onto the chassis which doesn't stress the body.

Mike
My layout: Mwynwr Tryciau Colliery, the Many Tricks Mine.

My 3D Modelshop: Maridunian's Models

Offline maridunian

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Re: Peckett OQ - the Mardy Monster
« Reply #19 on: February 26, 2020, 09:54:02 AM »
For each of my 3D Pecketts I've mulled doing something about the cylinders and cross-head motion. In the end I chickened out - too hard - limited upside - more work needed on the piston rods etc, etc.

Well, I had to create new cylinders for the OQ, so I've got beyond mulling and added slide bars and their support brackets:



They'd be cosmetic - the motion shouldn't touch the bars. I'd be grateful for any comments you might have on the benefit /likely durability of this in Shapeways Smoothest Fine Detail Plastic (FUD).

Mike
« Last Edit: February 26, 2020, 09:55:06 AM by maridunian »
My layout: Mwynwr Tryciau Colliery, the Many Tricks Mine.

My 3D Modelshop: Maridunian's Models

Offline Bealman

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Re: Peckett OQ - the Mardy Monster
« Reply #20 on: February 26, 2020, 10:09:29 AM »
Amazing, Mike.  :thumbsup:

Just heading to bed here in Australia, but I'm glad I caught this!  :beers:
Vision over visibility. Bono, U2.

Offline maridunian

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Re: Peckett OQ - the Mardy Monster
« Reply #21 on: February 26, 2020, 12:48:36 PM »
Thanks George @Bealman - it will be amazing if it a) works and b) survives!

Mike
My layout: Mwynwr Tryciau Colliery, the Many Tricks Mine.

My 3D Modelshop: Maridunian's Models

Offline maridunian

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Re: Peckett OQ - the Mardy Monster
« Reply #22 on: February 28, 2020, 12:59:45 PM »
While design tweaking continues towards a definitive print, I've been mulling liveries for this loco.

Apparently it was delivered in 1954 finished in Azure Blue, with standard pattern Peckett lining. A nameplate "Mardy No.1" was added to the cabside above the oval Peckett plate and "N.C.B." adorned the tank. This was probably yellow, shaded red, but that had all faded/worn-off to white by 1967.

This undated picture , sometime between 1967 and 1975 shows No.1 out of use. Removed cabside plates reveal the underlying blue. Front buffers and steps missing. The picture also features @mk1gtstu 's engine shed!

This might show her out of use in 1969. Note the odd (Barclay?) smoke-box door and missing front/damaged rear steps. Large faced Peckett front buffers present. No sign of bolt holes or uncovered paintwork of the cab plates though, so it's more likely to be have been Mardy No.2.

By 1972 No.1 was wearing Battleship Grey with red details. Stubby, large faced Peckett buffers at rear; more standard replacements at front.

In this 1975 picture, there are cab-side plate bolt-holes on the left-hand side, so maybe it had the right-hand side-sheet repaired at some point? (Or maybe the previous picture was actually Mardy No.2?)

In preservation No.1 seems to have initially worn a mid-green with red/black lining, along with a GWR style cast number and nameplates. More recently its finish resembles BR passenger locos, a darker green with orange/black lining. Front steps present and non-Peckett buffers all round.

When I started 3D printing I would make my test prints in Shapeways' cheapest material, Flexible White Plastic. However, I could never bear to throw them away, so always ended up finishing them to a usable standard, which was a lot of work.

Now that I'm more confident about my designs, I test print in Smoothest Fine Detail Plastic with a mind to keeping them and finishing them off more easily. Design glitches are overcome with iron-age tools including knives, saws and files!

The first test print pictured earlier in the thread will be finished in the Battleship Grey livery (ie Halfords Grey Primer!), suitably detailed and weathered. I'll probably apply one of the later liveries to the definitive print, whenever I get to the point of committing the design to FUD!

Mike




« Last Edit: March 02, 2020, 11:14:40 AM by maridunian »
My layout: Mwynwr Tryciau Colliery, the Many Tricks Mine.

My 3D Modelshop: Maridunian's Models

Offline maridunian

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Re: Peckett OQ - the Mardy Monster
« Reply #23 on: March 02, 2020, 06:06:46 PM »
OK, well here's the initial draft print seen above with a first coat of primer on. Some surgery scars above the slightly lengthened cylinders. I shortened the footplate by 2mm in order to move the cylinders backwards.



It's not yet my smoothest runner, but hey! 

With this one approaching completion, I have the dimensions I need to finalise the definitive print.

Mike
« Last Edit: March 05, 2020, 07:02:09 PM by maridunian »
My layout: Mwynwr Tryciau Colliery, the Many Tricks Mine.

My 3D Modelshop: Maridunian's Models

Offline maridunian

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Re: Peckett OQ - the Mardy Monster
« Reply #24 on: March 05, 2020, 11:34:40 AM »
OK, that's draft 1 Monster more or less done:



Now, back to the drawing board to check every measurement before (hopefully) the definitive print.

Mike
My layout: Mwynwr Tryciau Colliery, the Many Tricks Mine.

My 3D Modelshop: Maridunian's Models

Offline maridunian

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Re: Peckett OQ - the Mardy Monster
« Reply #25 on: March 07, 2020, 10:11:32 AM »
Ok, well that's the definitive print (I hope) ordered from Shapeways:



The big change is the addition of slidebars, a big gamble in their brittle Smoothest Fine Detail Plastic:



I've made these as thick as I think I can get away with, and buttressed all the corners to try to distribute the stresses they'll inevitably suffer in service.

If these models were manufactured then the footplate would be made of something tougher, protecting features and supporting the body, but making for myself we'll just have to see how this goes.... Fingers crossed!

Mike
My layout: Mwynwr Tryciau Colliery, the Many Tricks Mine.

My 3D Modelshop: Maridunian's Models

Offline Bealman

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Re: Peckett OQ - the Mardy Monster
« Reply #26 on: March 07, 2020, 10:59:29 AM »
Mike, this looks great. Totally impressed here at the Antipodes.  :thumbsup:

Good luck with it, mate!  :beers:
Vision over visibility. Bono, U2.

Offline mk1gtstu

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Re: Peckett OQ - the Mardy Monster
« Reply #27 on: March 07, 2020, 11:05:30 AM »
That looks great! Would other chassis fit under it other than the Minitrix one? E.g Farish class 03, 04 shunters etc?

Cheers, Stu
My Box File Layout (South Wales Valleys Colliery) http://www.ngaugeforum.co.uk/SMFN/index.php?topic=10430.0

Porthkerry (A South Wales layout in BR Blue) http://www.ngaugeforum.co.uk/SMFN/index.php?topic=39654.0
 
Abercwm Colliery (South Wales Area) https://www.ngaugeforum.co.uk/SMFN/index.php?topic=47521.0

Offline maridunian

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Re: Peckett OQ - the Mardy Monster
« Reply #28 on: March 07, 2020, 11:22:07 AM »
Mike, this looks great. Totally impressed here at the Antipodes.  :thumbsup:

Good luck with it, mate!  :beers:

Thanks George - having great fun with this. Find I'm daydreaming 3D structures!

Mike
My layout: Mwynwr Tryciau Colliery, the Many Tricks Mine.

My 3D Modelshop: Maridunian's Models

Offline maridunian

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Re: Peckett OQ - the Mardy Monster
« Reply #29 on: March 07, 2020, 11:24:52 AM »
That looks great! Would other chassis fit under it other than the Minitrix one? E.g Farish class 03, 04 shunters etc?

Cheers, Stu

Quite possibly. With these slide bars and with everything sooty black, the lack of a coupling rod won't be apparent.

I've an 03 somewhere so will check. Terrified to take it apart though, which is another reason I'm stuck in the '80s. It's very comforting to be able to count all the components on your fingers!

Mike
« Last Edit: March 10, 2020, 06:40:44 PM by maridunian »
My layout: Mwynwr Tryciau Colliery, the Many Tricks Mine.

My 3D Modelshop: Maridunian's Models

 

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