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.

P2 Locomotive Company and related matters

Discussion in 'Steam Traction' started by class8mikado, Sep 13, 2013.

Page 77 of 165
  1. W.Williams

    W.Williams Well-Known Member

    Joined:
    Dec 20, 2015
    Messages:
    1,585
    Likes Received:
    1,465
    Occupation:
    Mechanical Engineer
    Location:
    Aberdeenshire
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    My understanding they are being used for their improved reliability and wear characteristics, as demonstrated on Tornado.

    Is axial movement not controlled by the horn guides...?
     
    W.Williams, Jan 10, 2018
    #1521
  2. 8126

    8126 Member

    Joined:
    Mar 17, 2014
    Messages:
    823
    Likes Received:
    962
    Gender:
    Male
    Yes, using taper roller bearings gives both the radial bearing and the thrust bearing, which on a conventional axlebox is provided by the wheel seat bearing against the outer face of the axlebox.

    Spherical roller bearings have also been used for axleboxes at times; I believe at least one 240P was fitted with them on the crank axle (main bearings, not big ends).
     
    8126, Jan 10, 2018
    #1522
  3. W.Williams

    W.Williams Well-Known Member

    Joined:
    Dec 20, 2015
    Messages:
    1,585
    Likes Received:
    1,465
    Occupation:
    Mechanical Engineer
    Location:
    Aberdeenshire
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    What's a spherical roller bearing?
     
    W.Williams, Jan 10, 2018
    #1523
  4. ghost

    ghost Part of the furniture

    Joined:
    May 29, 2006
    Messages:
    3,991
    Likes Received:
    5,114
    Gender:
    Male
    Location:
    N.Ireland
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    ghost, Jan 10, 2018
    #1524
  5. 8126

    8126 Member

    Joined:
    Mar 17, 2014
    Messages:
    823
    Likes Received:
    962
    Gender:
    Male
    The rollers have a barrel form to them, with correspondingly shaped races. They basically allow all three axes of rotation (limited range in the two axes that aren't the shaft) but no translation movements. They make aligning two bearings at opposite ends of a shaft a lot easier, like a roller version of a plain spherical bearing. One of the products that established SKF in the bearing market.
     
    8126, Jan 10, 2018
    #1525
  6. Phill S

    Phill S New Member

    Joined:
    Feb 23, 2015
    Messages:
    136
    Likes Received:
    109
    Gender:
    Male
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Also used in some British motorcycle engines, to allow the crank to flex to absorb load. Thanks for the replies all.
     
    Phill S, Jan 11, 2018
    #1526
    Richard Roper likes this.
  7. class8mikado

    class8mikado Part of the furniture

    Joined:
    Jun 1, 2009
    Messages:
    3,626
    Likes Received:
    1,455
    Occupation:
    Print Estimator/ Repository of Useless Informatio.
    Location:
    Bingley W.Yorks.
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Are Skefco still in the 'railway' marketplace ?
     
    class8mikado, Jan 11, 2018
    #1527
  8. Foxhunter

    Foxhunter Member

    Joined:
    Jun 9, 2011
    Messages:
    590
    Likes Received:
    709
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Foxhunter, Jan 25, 2018
    #1528
    MarkinDurham, S.A.C. Martin, Bluenosejohn and 6 others like this.
  9. Richard Roper

    Richard Roper Well-Known Member

    Joined:
    May 22, 2006
    Messages:
    1,310
    Likes Received:
    1,355
    Gender:
    Male
    Occupation:
    Librarian
    Location:
    Just up the road from 56E Sowerby Bridge
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Yep, the famous Norton "Superblend" Commando crankshaft bearings...

    Richard.
     
    Richard Roper, Jan 25, 2018
    #1529
  10. PC5020

    PC5020 New Member

    Joined:
    Oct 10, 2016
    Messages:
    47
    Likes Received:
    29
    Location:
    Exeter
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Well as an owner of said Commando, it has been fairly well established that the whole "spherical" thing isnt exactly true.
    The bearings are not spherical in actuality. The closest Ive seen are the rear differential bearings in the old torque tube Buick
    which were Hyatt brand and barrel shaped. Hyatt bearings were used under E series EMD passenger diesels. No
    idea if they were barrel shaped.
     
    PC5020, Jan 25, 2018
    #1530
  11. W.Williams

    W.Williams Well-Known Member

    Joined:
    Dec 20, 2015
    Messages:
    1,585
    Likes Received:
    1,465
    Occupation:
    Mechanical Engineer
    Location:
    Aberdeenshire
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    Its a slight oxymoron really, technically speaking, they are "funcy roller bearings"

    How long until we have a wheeled P2! This is starting to get very very real!
     
    W.Williams, Jan 26, 2018
    #1531
    240P15 likes this.
  12. Richard Roper

    Richard Roper Well-Known Member

    Joined:
    May 22, 2006
    Messages:
    1,310
    Likes Received:
    1,355
    Gender:
    Male
    Occupation:
    Librarian
    Location:
    Just up the road from 56E Sowerby Bridge
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Great stuff! I reckon at this rate, there's a decent chance of seeing a wheeled chassis with the cylinder block fitted by next Christmas!

    Richard.
     
    Richard Roper, Jan 26, 2018
    #1532
    Matt37401 and Gav106 like this.
  13. Matt37401

    Matt37401 Nat Pres stalwart

    Joined:
    Jun 8, 2014
    Messages:
    15,449
    Likes Received:
    11,798
    Occupation:
    Nosy aren’t you?
    Location:
    Nowhere
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Wouldn't that be nice!
     
    Matt37401, Jan 26, 2018
    #1533
  14. Richard Roper

    Richard Roper Well-Known Member

    Joined:
    May 22, 2006
    Messages:
    1,310
    Likes Received:
    1,355
    Gender:
    Male
    Occupation:
    Librarian
    Location:
    Just up the road from 56E Sowerby Bridge
    Heritage Railway Volunteer:
    No I do not currently volunteer
    It most certainly would! I'll also hedge a bet that it'll be an eight-coupled chassis by next Christmas too, ie. with at least the coupling rods fitted or trial fitted.
    I really must get myself up to Darlo and have a look at this beast this year!

    Richard.
     
    Richard Roper, Jan 26, 2018
    #1534
  15. 240P15

    240P15 Well-Known Member

    Joined:
    Dec 1, 2017
    Messages:
    1,603
    Likes Received:
    1,592
    Gender:
    Male
    Location:
    Norway
    Heritage Railway Volunteer:
    No I do not currently volunteer
    The original P2`s were equipped with ACFI feedwater heater, will the new build also have such one?
     
    240P15, Jan 27, 2018
    #1535
  16. Johnb

    Johnb Nat Pres stalwart

    Joined:
    Dec 3, 2014
    Messages:
    14,422
    Likes Received:
    16,580
    Gender:
    Male
    Occupation:
    Retired, best job I've ever had
    Location:
    Buckinghamshire
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    As far as I know it won't
     
    Johnb, Jan 27, 2018
    #1536
  17. 30854

    30854 Resident of Nat Pres

    Joined:
    Mar 8, 2017
    Messages:
    12,172
    Likes Received:
    11,493
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Brighton&Hove
    Heritage Railway Volunteer:
    No I do not currently volunteer
    I'd be most surprised if A1SLT didn't include some form of water treatment.
     
    30854, Jan 28, 2018
    #1537
  18. 240P15

    240P15 Well-Known Member

    Joined:
    Dec 1, 2017
    Messages:
    1,603
    Likes Received:
    1,592
    Gender:
    Male
    Location:
    Norway
    Heritage Railway Volunteer:
    No I do not currently volunteer
    They did, but it`s being used for cooking tea water.:D
     
    240P15, Jan 28, 2018
    #1538
    andrewshimmin, Bluenosejohn and 30854 like this.
  19. 30854

    30854 Resident of Nat Pres

    Joined:
    Mar 8, 2017
    Messages:
    12,172
    Likes Received:
    11,493
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Brighton&Hove
    Heritage Railway Volunteer:
    No I do not currently volunteer
    Well it's all a question of priorities, old chap! :Pompus:
     
    30854, Jan 28, 2018
    #1539
    240P15 likes this.
  20. Foxhunter

    Foxhunter Member

    Joined:
    Jun 9, 2011
    Messages:
    590
    Likes Received:
    709
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    For a number of reasons No. 2007 will have the standard pair of injectors used on Tornado's boiler. The requirement to run an ACFI fitted locomotive with the regulator open most of the time would be counter-productive on today's railway (although this worked well in France where operating conditions were somewhat different). The aim is to have two (or three) diagram 118A boilers that can be swapped between No. 2007 and No. 60163 and the ACFI feedwater heater would compromise this scheme. In its place will be a pair of Stones turbogens. Water treatment has nothing to do with the ACFI equipment and will be applied to the tender as it is now with Tornado.

    Foxy
     
    Foxhunter, Jan 28, 2018
    #1540
    MellishR, MarkinDurham, Bluenosejohn and 3 others like this.
Page 77 of 165

Share This Page