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David Andrews Princess Royal - 6206 Princess Marie Louise

Discussion in 'Platform1mrc 2022 Loco Build Competition' started by Rob Pulham, Feb 3, 2022.

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  1. Jul 26, 2023 #321
    York Paul

    York Paul Staff Member Moderator

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    Hi Rob, Thank you for that reply which is most informing, yes my Finney etches are dated 2017 and the castings are the best I've seen... every detail is crisp and sharp with not heat distortion of parts anywhere. This kit is certainly worth the money and for me its the investment in time taken to build it which I have only cursorily looked at as yet. There is a lot of prep work to be done on the etches before they even see heat, taping out threads, reaming hole openings and such like. The boiler and firebox is a very crisply cast resin item with cast smokebox too... careful drilling required to allow for component fitting. Yes I am going to enjoy this build but first have to clear my bench backlog od builds.

    Regards Paul
     
  2. Aug 18, 2023 #322
    Rob Pulham

    Rob Pulham Happily making models Staff Member Administrator Feature Contributor

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    Well I managed to get my head into gear and work out a way to get past my issue of not being able to retain the cylinders in the chassis without the body in place.

    From a piece of 3mm diameter nickel rod I turned a short length down to 2.2mm and threaded it 8BA. I cut it off using a piercing saw then reversed it and face it off until I had just the merest hint of a head as the thread ends.

    IMG_0001.JPG

    I drilled a couple of holes in the top plate between the cylinders and tapped them 8ba there was already a slot in the frame spacer to accommodate one of the screws but I had to drill a corresponding hole to allow the second screw to pass through the spacer.

    IMG_0002.JPG

    There isn't a huge amount of screw thread in the holes so I soldered the screws in to reinforce them.

    IMG_0003.JPG
     
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  3. Aug 20, 2023 #323
    paul_l

    paul_l Staff Member Administrator

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    Very nice solution
     
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  4. Sep 22, 2023 at 10:40 AM #324
    Rob Pulham

    Rob Pulham Happily making models Staff Member Administrator Feature Contributor

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    The day before leaving for Stafford I had a bit of a disaster with the motion on the Princess in so much as one of the combination lever's snapped off while it was running on the rolling road. Initially I thought that it was due to there not being enough material left after opening out the holes for the locating pins but once I got back from Stafford and was able to remove the top end (the simple task of unscrewing a couple of 14ba screws) I found that the rod had actually snapped part way down the fluted section. I think that I have just been unlucky in that it was over cooked etch wise and that there was very little material left. there is so little that I cannot get my camera to focus on it to show what I mean.

    Thankfully I had a couple of spares courtesy of Nick Dunhill so I have prepped a replacement. Not taking any chances on this one I have soldered a small strip of 10thou (0.25mm) onto the back of the rod to add a little extra strength. This has been done in fits and starts because like many other Chris and I picked something up at Safford that has taken a bit of shaking off. We have started to feel better one day only to feel crap again the next. Fingers crossed it's behind us now.

    IMG_0001.JPG

    IMG_0002.JPG

    IMG_0001.JPG

    IMG_0002.JPG

    I just have to refit it to the loco now.
     
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  5. Sep 22, 2023 at 1:02 PM #325
    paul blythe

    paul blythe Full Member

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    Excellent make do and mend. no one will notice the repair either. Ive got a similar issue on my standard 4mt. I managed to snap the piston valve spindle within the cylinder block the other day. hope your feeling better soon too
     
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  6. Sep 23, 2023 at 3:56 PM #326
    paul_l

    paul_l Staff Member Administrator

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    Nice one Rob.

    Hi planned ahead and got Covid 3 weeks before Stafford (and tested clear) still got the damned cough tho'

    Hopefully you both fully recover soon

    Paul
     
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