On SRman's Workbench

Discussion in 'Workshop Benches' started by SRman, Feb 27, 2016.

  1. SRman

    SRman Full Member

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    In a fit of impulsiveness, I bought a Silver Fox class 123 DMU conversion kit from their eBay store. I have always had an interest in the DMUs as an aside to the usual London and Southern-influenced stock, and have done quite a few conversions over the years. I had a class 121 'bubble car' long before Lima brought one out. I have class 104s converted from Hornby 110s, a class 120 converted from class 117 components with Craftsman brass etched overlays, and have done several conversions of Lima's class 117 to provide DMS cars rather than having two DMBS cars in a set.

    With this list of previous conversions in mind, plus future class 119 and 129 conversions still in their boxes, I have now set up the class 123 Swindon Intercity unit to be done. This will accept several compromises, not the least of which is that the 123 units did not really have mark 1 side profiles, but had a flatter upper section and shallower windows. However, the layouts of the internals and external windows and doors was very, very close to those of the equivalent mark 1 coaches. The set will be a 4-car unit with this formation: DMBSO + CK + SO + DMSK. I used mainly bargain bin coaches from Bachmann, but was only able to get a CK and SK in blue and grey (saving repainting of the centre coaches). You may notice that one of these needs to be an SO rather than a corridor SK. I dismantled one of the maroon SOs that I had bought, and swapped the roofs and interiors (the roof vent layout is different between SO and SK), and fitted B4 bogies while I was at it.

    The driving motors should have B5 bogies, but I will accept the B4s for now, but when I next order something from Replica Railways, I'll pick up some B5 side frames. I forgot to do this when I ordered a motorised chassis (64' with 12mm wheels), plus some other unrelated bits and pieces for use in other projects.

    One minor irritation is that the maroon SOs, as bought, came from earlier Bachmann moulds and had prominent transverse ridges on their roofs, while the blue and grey corridor pair (as bought) have smooth roofs.

    No further work has been done on the conversion other than that described above and the fitting of B4 bogies to the remaining two coaches.

    Here is what I have for now. There were extra conversion bits to be used in the Silver Fox box not shown here.

    [​IMG]
    P_20191026_092955_vHDR_On
    by Jeffrey Lynn, on Flickr

    [​IMG]
    P_20191026_092934_vHDR_On
    by Jeffrey Lynn, on Flickr
     
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  2. SRman

    SRman Full Member

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    A tiny bit more preparatory work on the class 123 DMU: I have removed all of the weights from the Bachmann coaches (it really isn't needed as they have more than enough weight in their construction) and removed the end handrails and corridor connections from the outer ends of what will be the driving coaches. The driving ends are actually going to be completely replaced by the resin components, but removing the connections will make it easier to cut off the coach end while retaining the headstocks and buffers.

    What is going to be the DMSK (Driving Motor Second Corridor) has had its underframe trusses removed and the battery boxes shifted, then the resin engine/transmission and fuel tank components glued on. I forgot to mark the position of the centre screw on the coach underframe, so had to guess where to drill an access hole in the resin base - I missed twice, but no real harm done. This particular coach has one body fixing screw at what will be the cab end that won't budge. I have stripped the head of it in trying, but will end up drilling it out completely when the time comes to dismantle the coach for the side modifications. For the DMSK, I have to remove one window bay on each side to the rear of the centre door, then shift the forward portion back to join it, then add the resin cab moulding, so the side ends up with the cab bit, four windows, door, then three windows, a door and a toilet window.

    [​IMG]
    P_20191027_174838_vHDR_Cropped
    by Jeffrey Lynn, on Flickr


    The DMBSO (Driving Motor Brake Second Open) is going to require a lot more work to incorporate the motorised chassis.

    Thinking out loud here (so to speak!): I intend to use one of the Replica Railways motorised chassis (they refer to them as RPCs), but as an alternative, I do have a Hornby class 121 I intended for conversions, possibly to power the intended class 119 unit. If the RPC has sufficient power and traction, I may even be able to use a half-chassis with only one motor, thus hiding it in the van section and still allowing full seating for the open saloon section. That would free up the other half of the RPC to power my currently unpowered class 456 EMU.
     
    Last edited: Oct 27, 2019
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  3. SRman

    SRman Full Member

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    Some further work on the class 123 DMSK, which will not be motorised. I have cut the side sections and butted them up, trimmed the roof (although a tiny bit more may need to be removed, cut a section out of the seat unit, removed the coach end at the cab end, and posed the resin cab at that end. Nothing has been glued and filled at this stage, there is still a small amount of fettling to do. The parts are shown just after cutting, and assembled loosely in a way that gives an idea of how it will look once completed.

    [​IMG]
    P_20191029_180336_vHDR_On by Jeffrey Lynn, on Flickr

    [​IMG]
    P_20191029_183951_vHDR_On by Jeffrey Lynn, on Flickr
     
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  4. SRman

    SRman Full Member

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    Another small step in creating the class 123 DMU. This is the first fitting for the DMBS casting. A little trimming is still required, and the underframe will have to be drastically altered to allow the motor chassis to be fitted.

    [​IMG]
    P_20191112_220609_vHDR_Cropped by Jeffrey Lynn, on Flickr
     
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  5. SRman

    SRman Full Member

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    A recent European loco purchased was this Swedish SJ RC3 Bo-Bo electric locomotive. I got it at a very reasonable price, otherwise I would not have countenanced buying it because is is a Lima model, with the construction common to the majority their British diesel models, i.e. it has a pancake motor on one bogie with diagonally split pickup and the horrible brass wheels. However, for all of that, it is probably the best running Lima model I have ever come across, with excellent low speed control on both DC and (subsequently) DCC. It was worth purchasing and converting to DCC.

    I was even luckier in that the motor brushes are already completely isolated from the power bogie frame, so hard-wiring a decoder was simplicity itself. I connected the red wire of the chosen decoder, a Zimo MX600 with its 8-pin plug cut off, to the electrical pickups on the power bogie, adding a red heat-shrink sleeve to the bare wire coming up from the pickups. The black wire was attached directly to the unpowered bogie's brass clip. The orange and grey wires were soldered to each brush clip, and the loco was tested on the programming track. It worked perfectly, and very, very smoothly first go. It even went in the right direction for what I wanted to be forwards.

    The model comes with directional lighting using diodes and bulbs. The lighting wires and diodes were removed from the dummy bogie's clip at the same time as I was soldering the black wire to it, and the light's return wire removed from the motor bogie pickup wire where it was attached. After testing the motor wiring, I could now wire the blue wire to both bulbs and the white wire to what would be the leading bulb (I like the unpowered end to be the "front"), and the yellow wire to the trailing bulb. Once again, I tested this on the programming track, and all worked perfectly when Function 0 was selected.

    The loco was programmed to its running number, 1058, and sent around the main lines with a suitable train, where it is seen here.

    All in all, I am pleased with it for what was a very low budget acquisition.

    I will in the future do something about the light bleed where the body halves join, and give it some rudimentary cab interiors, which will also prevent the headlights illuminating the (empty) cabs as they do at present.

    The coaches are from Roco and NMJ (a Norwegian firm I hadn't heard of before), and are of a very high quality.

    [​IMG]
    P_20200126_113209_vHDR_On by Jeffrey Lynn, on Flickr
     
    Last edited: Jan 27, 2020
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  6. SRman

    SRman Full Member

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    As many of you know, I am also into model buses; here is the latest one off the workbench, with a couple of minor finishing touches still to come. It is a Little Bus Company resin kit of a 1936 London Transport country area forward-entrance STL (AEC Regent type). The strange doorless entrance took up two seating bays and was supposed to be draught-free ... it wasn't! The early greens varied somewhat and didn't weather well in service, but LT eventually settled on the more familiar Lincoln green for its country buses. I have tried to capture the look of the early lighter green livery as best I can with very little accurate information available.

    Note that this bus has been 'borrowed' for use on Green Line route Y1. These buses were intended for such use but deemed unsuitable, but were used when certain Green Line routes were reinstated during the War. Buses were known to be substituted for coaches on Green Line services many times to cover for failures or shortages. Green country buses were preferred, but red buses did appear on occasion

    [​IMG]
    P_20200201_230619_vHDR_On
    by Jeffrey Lynn, on Flickr

    [​IMG]
    P_20200201_230641_vHDR_On
    by Jeffrey Lynn, on Flickr


    What's missing? I have not yet added registration number plates or fleet numbers, and the half-drop opening windows (three per side upper, two per side lower deck) will be represented with microstrip on the appropriate windows.
     

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