Highland Railway Drummond 0-4-4T Passenger Tank

Discussion in 'Kits, Kit bashes & Scratch builds' started by paul_l, Jan 11, 2019.

  1. paul_l

    paul_l Staff Member Administrator

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    This is a post of intent - while ordering up wheels for the Class 26 and J79 I thought I may as well order the wheels for my first O gauge scratch build - well my first computer aided scratch build


    Just a taster

    [​IMG]

    [​IMG]

    The intention is to make the chassis with the wee cnc machine, and a combination of brass and 3d resin printed parts for the superstructure

    This may be a while, as I have to learn how to use both the software and hardware to make it.

    Paul
     
  2. Kimbo

    Kimbo Staff Member Moderator

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    Interesting project Paul :thumbup: look forward to following this build.
    Kim
     
  3. Rob Pulham

    Rob Pulham Staff Member Administrator Feature Contributor

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    Superb Paul,

    I do love a bit of scratch building.:thumbup:
     
    Last edited: Jan 14, 2019
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  4. jakesdad13

    jakesdad13 Staff Member Moderator

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    OOOH this is going to be good! Don't keep us in suspenders for tooo long mate :avatar::avatar:

    Cheer's, Pete.
     
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  5. York Paul

    York Paul Staff Member Moderator

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    Yes I thought so too. :thumbs: This is total scratch building starting totally well... from scratch :tophat:
     
  6. paul_l

    paul_l Staff Member Administrator

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    Jeepers - 7 months later and a wee bit of time off for good behavior, I finally made a start.

    I scanned and resized the drawing from Peter Tatlow's Highland Locomotives book, then printed to A3.

    Measured the boiler radii and started the 3D model in 123D

    upload_2019-8-12_21-58-30.png

    Smoke box, boiler and boiler bands.

    Then added - or is that subtracted the holes for the Chimney and Safety dome and the start of the smoke box front

    upload_2019-8-12_22-2-2.png

    Now the wing plates sanbox and splashers

    upload_2019-8-12_22-4-55.png

    The tanks start at the end of the splashers and are flush with the cab sides, which if printed as 1 piece is too big for the Anycubic printer. So a wee bit of thinking / juggling to be done.

    Paul
     
  7. Toto

    Toto I'm best ignored Staff Member Founder Administrator

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    Excellent ....... just don't get too used to the time off. :avatar:
     
  8. Gary

    Gary Will the real Gary please stand up... Staff Member Administrator

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    I had done a little search about this engine as the name Drummond rang a bell, being the same name as the engineer who designed locos for the LSWR/SR, Dugald Drummond. But the designer of this loco, the W Class is the younger brother of Dugald, Peter Drummond !

    Looking forward to following on with the build.

    Cheers, Gary.
     
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  9. paul_l

    paul_l Staff Member Administrator

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    ex Highland Railway engineers were popular down south, Stroudley, Drummond, it's how Richard (Ben Alder) managed to produce some amazing what if's by using some of the Drummond LSWR loco's as donors. Even the Terrier looked at home up North on Another Bridge - not sure how the southener would cope with a wee bit o snae :avatar:
     
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  10. Ben Alder

    Ben Alder Full Member

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    Terriers were used north of Inverness during The Great War, along with an esoteric collection of other southerners, so managed! The Drummond brothers also left their mark on the NB, Caley and GSWR as well, with a lot of cross fertilisation between them. Proving the old adage that about all GW locos looking the same can be extended to this family's output has proved useful in my"adaptions" of their southern work.
     
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  11. paul_l

    paul_l Staff Member Administrator

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    A bit more work done today

    Safety Dome

    upload_2019-9-4_22-43-9.png

    Chimney

    upload_2019-9-4_22-44-26.png

    Tank fillers

    upload_2019-9-4_22-45-30.png

    Currently printing, so I should have results by morning

    Paul
     
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  12. Toto

    Toto I'm best ignored Staff Member Founder Administrator

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    :thumbs:
     
  13. Gary

    Gary Will the real Gary please stand up... Staff Member Administrator

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    Looking forward to seeing the printed examples.

    Cheers, Gary.
     
  14. paul_l

    paul_l Staff Member Administrator

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    Well mixed but promising results

    The downsides were all caused by the support removal




    Before removal of the supports the prints were perfect, I will try reducing the weight and amount of supports, if this fails I may have to increase the thickness of the flange.

    With the tank fillers I printed 1 paralell to the base (left) and 1 at 30 degrees to the base (right)


    The left hand version displays layer lines (printed with 0.05mm layer height), whereas the angled version is spot on with no visable layers. Strangely tho' the safety dome showed no sign of layers, probably down to the 6.75mm dia of the dome to the 50mm dia of the tank filler lid.

    Paul
     
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  15. paul_l

    paul_l Staff Member Administrator

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    2nd test print ready to go

    upload_2019-9-5_11-22-50.png

    Trying light weight supports, and also turning the chimney and Dome upside down to see if that wiorks - 5 hours time will tell.

    Paul
     
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  16. paul_l

    paul_l Staff Member Administrator

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    Ofcourse, I could just print the chimney and dome as part of the boiler print - I will need to see if they will fit on to the print bed.
     
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  17. ianvolvo46

    ianvolvo46 Staff Member Moderator

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    I was going to say that … maybe :scratchchin:

    Ian vt
     
  18. paul_l

    paul_l Staff Member Administrator

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    While the test prints are going, I thought I'd try the smokebox and splashers, and just to add a challenge, rivets as well

    upload_2019-9-5_16-29-45.png

    the results so far

    Paul
     
  19. paul_l

    paul_l Staff Member Administrator

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    Didn't like the rivets on the front, and as I've done this with 123D that doesn't have a timeline, I've just redone it from scratch and can add the rivets later, now that I have worked how to do it. :whatever:

    upload_2019-9-5_23-29-53.png
     
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  20. paul_l

    paul_l Staff Member Administrator

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    and with the rest of the boiler and fittings

    upload_2019-9-6_0-38-19.png

    I will have to redo the version with the rivits for LMS and BR days

    Paul
     
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