If you register, you can do a lot more. And become an active part of our growing community. You'll have access to hidden forums, and enjoy the ability of replying and starting conversations.

Pennsylvania RR Duplex 4-4-4-4 replica build

本贴由 Martin Perry2017-07-25 发布. 版块名称: International Heritage Railways/Tramways

  1. 240P15

    240P15 Well-Known Member

    注册日期:
    2017-12-01
    帖子:
    1,603
    支持:
    1,593
    性别:
    所在地:
    Norway
    Heritage Railway Volunteer:
    No I do not currently volunteer
    deleted
     
    Last edited: 2018-03-16
  2. PC5020

    PC5020 New Member

    注册日期:
    2016-10-10
    帖子:
    53
    支持:
    42
    所在地:
    Exeter
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Perhaps it was simply a matter of it not being worth redesigning and making new connecting and side rods. Other large American engines had the same or similar Timken lightweight rods and roller bearings on the rods. N&W J class for example
    had them and 300 psi. You could look up the operating pressure on any of the later engines who used roller rods. And dont forget, engines did not run at full pressure all the time.
     
    已获得30854的支持.
  3. 30854

    30854 Resident of Nat Pres

    注册日期:
    2017-03-08
    帖子:
    12,172
    支持:
    11,496
    性别:
    职业:
    Retired
    所在地:
    Brighton&Hove
    Heritage Railway Volunteer:
    No I do not currently volunteer
    I'd imagine such forces impacted heavily on chassis design and therefore weight. Presumably the adoption of cast steel frames, as applied in some later designs, allowed arrangements not readily achievable with the earlier bar frames.
     
    已获得NSWGR 3827的支持.
  4. 240P15

    240P15 Well-Known Member

    注册日期:
    2017-12-01
    帖子:
    1,603
    支持:
    1,593
    性别:
    所在地:
    Norway
    Heritage Railway Volunteer:
    No I do not currently volunteer
    已获得30854的支持.
  5. huochemi

    huochemi Part of the furniture

    注册日期:
    2008-05-06
    帖子:
    3,044
    支持:
    1,539
    性别:
    所在地:
    UK
    Heritage Railway Volunteer:
    No I do not currently volunteer

    附件文件:

    已获得240P15的支持.
  6. Dag Bonnedal

    Dag Bonnedal New Member

    注册日期:
    2012-03-28
    帖子:
    185
    支持:
    319
    性别:
    所在地:
    Stockholm, Sweden
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Well, depending on how you look on it, the section around the combustion chamber is a "circular barrel" as well. Albeit with lots of stays.
     
  7. 240P15

    240P15 Well-Known Member

    注册日期:
    2017-12-01
    帖子:
    1,603
    支持:
    1,593
    性别:
    所在地:
    Norway
    Heritage Railway Volunteer:
    No I do not currently volunteer
    已获得SunnieboyBluenosejohn30854的支持.
  8. 240P15

    240P15 Well-Known Member

    注册日期:
    2017-12-01
    帖子:
    1,603
    支持:
    1,593
    性别:
    所在地:
    Norway
    Heritage Railway Volunteer:
    No I do not currently volunteer
    已获得30854Sunnieboy的支持.
  9. 240P15

    240P15 Well-Known Member

    注册日期:
    2017-12-01
    帖子:
    1,603
    支持:
    1,593
    性别:
    所在地:
    Norway
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Have a look at this AMAZING new video promoting this new build project!:)



    Knut:)
     
    已获得30854, toplight, 2392另外2人的支持.
  10. Johann Marsbar

    Johann Marsbar Well-Known Member

    注册日期:
    2016-02-21
    帖子:
    1,671
    支持:
    2,192
    性别:
    所在地:
    Suffolk
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Firebox construction video....
     
    已获得30854240P15Bluenosejohn的支持.
  11. 240P15

    240P15 Well-Known Member

    注册日期:
    2017-12-01
    帖子:
    1,603
    支持:
    1,593
    性别:
    所在地:
    Norway
    Heritage Railway Volunteer:
    No I do not currently volunteer

    Thank you som much for posting this Johann!:) Look at the size of the firebox!:eek:
    Seems like a job for guys with good physique this one.

    Knut
     
    已获得30854的支持.
  12. Johann Marsbar

    Johann Marsbar Well-Known Member

    注册日期:
    2016-02-21
    帖子:
    1,671
    支持:
    2,192
    性别:
    所在地:
    Suffolk
    Heritage Railway Volunteer:
    No I do not currently volunteer
  13. Bikermike

    Bikermike Well-Known Member

    注册日期:
    2020-03-11
    帖子:
    1,832
    支持:
    2,071
    性别:
    所在地:
    Thameslink territory
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Good lord! Continental Fabricators are well-named, they could probably knock out a quick Africa if they can do that boiler...

    Also, the tubeplate looks like lace, not a lot of gap between those tubes.

    They look to have built the boiler first. How does the US system re boiler certs work compared to the UK system?
     
    已获得30854的支持.
  14. Martin Perry

    Martin Perry Nat Pres stalwart Staff Member Moderator Friend

    注册日期:
    2006-04-15
    帖子:
    16,552
    支持:
    7,905
    所在地:
    1012 / 60158
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Not much different, but the interval between major inspections is fifteen years.
     
  15. Bikermike

    Bikermike Well-Known Member

    注册日期:
    2020-03-11
    帖子:
    1,832
    支持:
    2,071
    性别:
    所在地:
    Thameslink territory
    Heritage Railway Volunteer:
    No I do not currently volunteer
    What triggers the start of the 15 years? presumably they won't do that bit until they have build a lot more of it. (AIUI UK new builds tend to do the boiler last for that reason - when it's finished it's ten-year interval starts counting down)
     
  16. Jamessquared

    Jamessquared Nat Pres stalwart

    注册日期:
    2008-03-08
    帖子:
    28,020
    支持:
    65,585
    所在地:
    LBSC 215
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Or 1472 service days AFAIK. (i.e. 15 years or 1472 days - whichever is less).

    Tom
     
    已获得Martin Perry的支持.
  17. Dag Bonnedal

    Dag Bonnedal New Member

    注册日期:
    2012-03-28
    帖子:
    185
    支持:
    319
    性别:
    所在地:
    Stockholm, Sweden
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    If I remember it correctly from a discussion on UP 4014, the counter starts ticking only when the boiler starts to produce steam the first time.
    Thus it could be pressure tested with warm water prior to that.
     
  18. 30854

    30854 Resident of Nat Pres

    注册日期:
    2017-03-08
    帖子:
    12,172
    支持:
    11,496
    性别:
    职业:
    Retired
    所在地:
    Brighton&Hove
    Heritage Railway Volunteer:
    No I do not currently volunteer
    The Corris did No.10's boiler first. AIUI, because the feeling was it's about as firm a statement you're serious as it's possible to make. Isn't the steam test when the clock starts ticking?

    I tripped over a still of the T1 boiler, as shown in Johann's post, [#32]. Ye gods, that thing is absolutely humongous.

    I'm still having to pinch myself to believe progress is coming on this fast. You have to imagine Cheyenne's well publicised return of 4014 (take a well earned bow, UP management and restoration team!) has generated a fair bit of interest in US steam and the iconic T1 is just the right project at just the right time.

    What if they're serious about going for Mallard's record? If there's one design with a realistic chance, it's surely this one. Couple that with all the renewed interest in US high speed rail (What? You hadn't heard the rumblings?), it's a possibility which suddenly doesn't seem quite as far fetched. What a great way that'd be to hand the baton over to modern high speed OHLE in a blaze of publicity that'd be seen right around the world.
     
    已获得The Dainton Banker的支持.
  19. Thompson1706

    Thompson1706 Part of the furniture

    注册日期:
    2007-11-19
    帖子:
    2,531
    支持:
    1,907
    性别:
    职业:
    Retired
    所在地:
    Rhiwabon
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    They could ask Jeff Bezos to pay for this loco from his small change, with the completed loco being named 'Amazon '

    Bob.
     
  20. Jon Pegler

    Jon Pegler New Member

    注册日期:
    2014-06-30
    帖子:
    42
    支持:
    30
    性别:
    Heritage Railway Volunteer:
    No I do not currently volunteer
    One of the problems with the original T1s was damage caused to the poppet valves, a problem that was never completely resolved. This was thought to be over-speeding outside the design parameters. That over-speeding was almost certainly caused by speeds in excess of 130mph, although there is no recognised, accurate and authenticated record of such speeds. If the new build is given it's head, Mallard's record may well go across the water.
     

分享此页面