RTR Loco conversion to S7

Discussion in 'S7 Group' started by eastsidepilot, 23 April 2013.

  1. eastsidepilot

    eastsidepilot Western Thunderer

    Here's an interesting job, makes a change from scratch building:rolleyes:.
    A F/S Ixion Manning Wardle 0-4-0st to be converted to S7 and then painted black and weathered heavily:D.
    I'll post the process of conversion, including wheel turning etc and what ever else needs attention in due coarse:thumbs:.

    DSCF2927.JPG DSCF2926.JPG
    ATB, Col.
     
  2. eastsidepilot

    eastsidepilot Western Thunderer

    We start with disassembly of the loco, it's all screwed together in three units, chassis, footplate and backhead, and cab tank and boiler/smokebox.
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    With the chassis upside down unscrew the axlebox keeper plates, disconect the coupling and con rods and the bottom cover on the gearbox remove the axles.
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    Next pull the wheels off the axles, remove the bearings and drive the gear off the drive axle, I used the tailstock on the lathe to do this with the axle a slide fit in the jaws.
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    DSCF3028.JPG

    Check the dimension of the wheel flanges, and skim the back of the wheels, using the soft jaws in the lathe, so as to leave 0.7mm effective flange thickness ( for S7 EF thickness is 0.66mm, 0.7 leaves some meat for the profile tool to work on.)
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    Go right across the back of the wheel including the boss.
    The wheeels can now be profiled in the conventional way using mandrels.
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    We also have to make new axles as the F/S axles are too short to be of use. I made these from 5/32" silver steel rod
    With the ends reduced to 3.5mm dia. for fitting to the wheels. Allow 31.25 for B/B plus the thickness of the wheel bosses for the o/a length.
    DSCF3033.JPG I realise that not every body has a lathe or access to one but if you farm out the turning work it shouldn't be too expensive.
    For those wanting to get into S7 with out building loco this can be a quick, easy and possibly cheaper way to get started
    ATB, Col.
    More to follow.
     

    Attached Files:

  3. Osgood

    Osgood Western Thunderer

    Fancy making it two Colin? I've just got back from the ALSMR Show with an identical beast needing the S7 treatment!!
     
  4. eastsidepilot

    eastsidepilot Western Thunderer

    I re-fitted the wheels with Loctite thread lock and quatered them by eye.
    With this ready to run model the chassis is designed for F/S so it's on the narrow side, this means that with the gauge pushed out to S7 standard we now have some side play which on an outside cylindered 0-4-0, or any 0-4-0 for that matter, we do not want.
    This means that we need to fit axle spacers between the backs of the wheels and the bearings, these I made from brass tube section that is a slide fit over the 5/32" axles, in this case they need to be 1.4mm in length but please measure your own model as there might be variation.
    DSCF3035.JPG
    With the axles back in the chassis we find that the slide bars and cross heads are touching the crank pin nuts which hold the rods because we have pushed the gauge out and the model is built for F/S.
    DSCF3036.JPG To cure this as simply as possible I turned the original crank pin nuts (bolts infact) down to round headed and countersunk.
    I then counter sunk the coupling rods to just a third of the thickness.
    DSCF3037.JPG
    I cut slots in the head and filed up an old cheap screwdriver to fit.
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    So that the rods and crankpin bolts fit flush properly I shortened the crankpins on the wheels slightly.
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    Check that all revolves freely, undo and re-fit with a little thread lock ( Loctite)
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    The axle can now be re-fitted into the chassis and test run to check for clearance.
    Next job will be painting and weathering.
    ATB, Col
     
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  5. Steph Dale

    Steph Dale Western Thunderer

    Neat job Col. Not that I'm surprised... ;)

    Steph
     
  6. eastsidepilot

    eastsidepilot Western Thunderer

    Osgood,
    Anytime mate, just send a PM or email:thumbs:
    ATB, Col.
     
  7. eastsidepilot

    eastsidepilot Western Thunderer

    Thanks Steph, if this was a personal project I would probably go for cast wheels, if they are available, I'm not keen on stainless steel.
    The other solution for the crank pins, on the leading axle, would be to remove the Ixion jobs and turn some up to take a threaded top hat bush, reversed on the pin and counter bore the rod to accept the head of the bush.
    Col.
     
  8. eastsidepilot

    eastsidepilot Western Thunderer

    My client's requirements for this little Manning Wardle are for a plain black loco fitted with plates supplied by Seven Mill and heavily weathered.
    I'm using Hycote acrylic spray cans for the basic coat, grey primer and satin black.
    DSCF3044.JPG
    I start withe the inside of the cab, then the outside.
    DSCF3045.JPG DSCF3046.JPG
    Then the footplate and backhead combined, shown here getting its coat of black. I have masked off the backhead as it has all it's fitting and I don't want to coat every thing in black paint.
    I will paint the backhead by brush and detail paint the fittings.
    DSCF3047.JPG Buffer beams next with satin red, I use this in preference to gloss red as it looks more like faded colour which red paint so often did.
    DSCF3048.JPG
    Now back to the cab and some modellers licence, I elected to paint the lower half of the cab interior black and the upper half straw or light buff which was often done on steam loco's. This is an industrial loco and is not conforming to any particular prototype either.
    This is done with a brush. DSCF3049.JPG
    Backhead masking removed and then detailed, again by hand.
    DSCF3050.JPG DSCF3053.JPG
    This will have further weathering later.
    The ash pan is given a coat of rust colour.
    DSCF3051.JPG Finally the body is given it's coat of satin black.
    DSCF3054.JPG
    This is all given 24 hrs to harden off.
    Strangley enough this Ixion comes without a whistle so I raided the spares box for something apropriate after studying some photo's.
    More to come.

    ATB, Col.
     
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  9. BrushType4

    BrushType4 Western Thunderer

    Col, I'd just like to sit with you and watch you work and learn. :bowdown:
     
  10. Ressaldar

    Ressaldar Western Thunderer

    Hi Col., looking very nice. Did you mask off the buffer beams over the primer then apply the red or did you apply the red over the black? I try where possible to mask off as I find that the black darkens the red too much. Looking forward to the weathering report.

    cheers

    Mike
     
  11. Railwaymaniac

    Railwaymaniac Western Thunderer

    I too had that as a problem, but I overcame it by adding a coat of white or light grey over the black before adding the red - worked like a dream.
    Oh, and I brushed on both of these coats.

    HTH

    Ian
     
  12. eastsidepilot

    eastsidepilot Western Thunderer

    Mike,
    I masked off and primed the buffer beams and then brush painted. I find that gey primer or red oxide is best for red.

    ATB, Col.
     
  13. eastsidepilot

    eastsidepilot Western Thunderer

    Before any weathering the last fitting job was the glazing as the Ixion comes without :confused:.
    Measurement of the circular windows came out at 8.5mm dia. so to cut these I made a punch or press tool.
    For this I used a piece of 10mm dia. brass bar. In the lathe this was drilled at one end with a centre bit and then bored with an 8.5mm drill approx. 6mm deep. A bevel is then turned on the end to form a cutting edge.
    A 2mm hole was then drilled down the end at an angle to come out through the side of the bar with my battery drill with the brass in the vice.
    The punch is put in the chuck on the drill press and the clear pastic placed on a piece of soft timber to press out the windows.
    This hole is push a blunt cocktail stick through to push the circular glass( pastic) out of the punch.
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    Steel would be better and will last longer.

    Weathering can begin with the cab interior and a grimy wash of diluted matt black enamel.

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    Next the name and works plates were painted red and then the surface clean off with some very fine wet and dry.
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    A piece of foam rubber glued into the bunkers
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    Then the coal added.......
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    DSCF3059.JPG With the loco now re-assembled the plates can be fixed in position.
    First a coat of grime colour is given all round and as this is to be heavily weathered I had to give a second coat.
    DSCF3061.JPG
    I use an Iwata airbrush with a 0.3mm nozzle, I find this about right for weathering.
    DSCF3064.JPG I can recommend the pistol grip and extra water trap.
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    Next the top surfaces are given a coat of matt black and the roof and chimny top some black powder as explained in the Monks Eleigh J68 thread.
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    A bit of dry brushing with some acrylic rust shades around the brake shoe's to suggest the dust that builds up.
    DSCF3067.JPG DSCF3068.JPG
    How about some real grimy grease and oil behind and around the slide bars and cylinders, use gloss black mixed with black powder, use an old or cheap brush 'cause it will ruin it.
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    Mor to follow.
    Col.
     
  14. Steph Dale

    Steph Dale Western Thunderer

    Why is it, that whenever I see nicely modeled industrial locos I come over all misty-eyed with the thought of the Littleton tank in bits at the Avon Valley Railway and wouldn't it make a lovely model?

    You're really not helping, Col! That's an utterly charming model with your paint job, which has lifted it to a degree I wouldn't have imagined.

    Steph
     
  15. eastsidepilot

    eastsidepilot Western Thunderer

    More wear and tear was introduced with handrails and steps given some dry brushed metalcote gunmetal and once dry this is polished.
    Rust staining at various places, and some more metalcote gunmetal on top of the tank with some scuff marks produced with a cotton bud. The dirt and soot would be disturbed here by the crew clambering up to lift the lid.
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    With regards to staining look at good colour photo's, where a loco has worked outside all it's life and has not been cleaned there will be stainin from below fittings were the sulpher from the soot has mixed with rain and then dried out with the heat from the loco and the sun. Paint starts to peel and fall off where the crews boots have constantly worn against the back plate on the steps thus going rusty.
    Final detail was to polish the centres of the buffer heads, with a glass fibre brush, down to bare metal and then dab some dark rust colour around the perimeter of this bare metal area with a cotton bud, use the paint dry, by this I mean as in dry brushing, don't use it to thick, I normally put some paint in an old jam jar lid and then just dab the end of the cotton bud in the paint then dab it off on some kitchen towel before using.
    Don't forget to clean the treads with a celluose dampened cotton bud, other wise it won't run:thumbs:

    ATB, Col.
     
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  16. john lewsey

    john lewsey Western Thunderer

    Hi Colin this looks really good what a difference from the start well done mate
    Genius
     
  17. Ressaldar

    Ressaldar Western Thunderer

    just brilliant Col.:bowdown::bowdown::bowdown: many thanks for sharing the method with us:thumbs::thumbs::thumbs:

    cheers

    Mike