7mm On Heather's Workbench - a baby Small Prairie

Discussion in 'WR Action' started by Heather Kay, 2 August 2017.

  1. Yorkshire Dave

    Yorkshire Dave Western Thunderer

    Incidentally this 1930 photo is in one of the Metropolitan Railway books I've recently acquired.

    Although not of brilliant quality and nor of the prototype you're building it does show a baffle plate on an early prairie tank between the tank top and the smokebox/boiler (clearest evidence is below the chimney). I trust this assists your decision to include them on your build :).

    (Apologies as I've had to adjust the contrast of the scan to highlight the baffle plate which is why ghosts of the photo on the previous page are present).

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  2. Scale7JB

    Scale7JB Western Thunderer

    Don't think I've ever seen a picture of an inside motion prairie before..

    JB.
     
  3. Paul Cambridge

    Paul Cambridge Western Thunderer

    Legend has it that the twenty 39xx 2-6-2Ts were rebuilt from Dean Goods. I find that a rather dubious as the wheelbase was different. They had all gone by 1934. They may well have been an accountancy ‘fudge’ so that they were not charged to capital expenditure. At least the wheel diameter was the same. They could have used the same cylinders, but I currently don’t have access to most of my books, so cannot check that. Most of the other components would have been new. The Vale of Rheidol No 1213 falls into the same category, there is no way it was a rebuild of one the original Davis & Metcalfe locomotives. Probably only the number plate was reused!

    Back to Heather’s baby small prairie. I’m following her build with interest as I built 4407 in 2000 from the Mitchell kit. As mine is in its post WW2 condition, I did not have so many modifications to make. I remember the faff with the steam brake and the rear pony truck amongst other things. Baffle plates on the tank tops, how did I miss that one....:headbang: . Far too late to do anything about it now :(. There are a couple of photos in Russell’s book to boot which show it..... :confused:. 7mm models of the class are thin on the ground. I’ve only seen two in real life, mine and the one Malcolm Mitchell had on his stand prior to JLTRT becoming involved. Interestingly, Malcolm’s model was of one early in its life with a short bunker etc, just as Heather is building.
     
  4. Heather Kay

    Heather Kay Western Thunderer

    Aaaand … we're back! I felt a nice festive break from the bench would be handy. Unfortunately, it then takes me lot longer to get back into the swing of things.

    Details, details. I spent a while figuring out how to add the tank top baffle plates convincingly. Before that, though…

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    I knocked up a styrene representation of the angle strip at the back of the firebox cladding. I consulted with Warren about whether such things might be affected during the painting process, but it's all good. I shall be adding boiler bands, probably from bare metal foil.

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    Now for those baffles. I needed thin material that I could bend to my will. I thought I’d try the aluminium from a beer can. I think it looks okay. It took me a couple of goes to figure out how to form the mild curves without the whole affair going bananas on me, but I won in the end. The panel beating round the firebox front did give me some trials, but I made a rough cut in masking tape until I was happy with the overall flat shape. This was transferred to the metal and trimmed, before being bent and moulded to fit. I’ve elected to ignore fixing bolts, as I think I’d end up distorting the thin material. Anyway, that’s one side done. Time for the other.
     
  5. Heather Kay

    Heather Kay Western Thunderer

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    Rather more reminiscent of the LMS's "Silver Jubilee" of 1935 than a product of Swindon (or Wolverhampton, in this case)!

    Bare Metal Foil, left over from the last 10001 escapade, has been put to use as boiler bands. The cleats come from the PRC range. Quite pleased with that. Now, what’s left on my list…

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    Oh. :oops:
     
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  6. Heather Kay

    Heather Kay Western Thunderer

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    A couple more items have been crossed off the checklist. Smokebox door and chimney, plus some gaps filled round the saddle.
     
  7. Heather Kay

    Heather Kay Western Thunderer

    Odds and ends. I think it’s time to seriously get the chassis further along now.

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    The handbrake stand, crew seats and whatever that handle is over by the reverser are fitted. The toolboxes, backhead, water gauge and other sundry bits and bobs will go in once it’s been painted. There are some levers and things that live on the floor around the backhead area, but I don’t have any in stock and, oddly, can’t find anyone that supplies them. As they’re effectively going to be invisible with the crew in and roof on, I’m not that worried.

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    The smokebox dart is in place, and the safety valve support structure is attached. Now there is a positive location for the bonnet after painting. The old beer can came in useful to make the washout plug covers. I fashioned a punch from some brass tube, and spent a happy few minutes thwacking the heck out of the sheet until I was happy with several circular thingummyjigs. I gently pressed a pointed thing into them to simulate the screw heads, and superglued them on.

    Right, time to dig photos out and work out what goes on under the running plate.