1. Untitled Document

Tag axles.

Discussion in 'MOTORHOME CHAT' started by knokinonabit, Dec 4, 2012.

  1. knokinonabit

    knokinonabit Funster

    Joined:
    Dec 28, 2011
    Location:
    Stokesley, North Yorks
    The term "tag axle" as applied to MHs is not strictly true.

    Way back when articulated lorries (as they were then known) only had two axles on the tractor unit, and the gross weight limit was increased if you had three axles, a third axle was added behind the drive axle. This could usually be lifted when travelling empty, for economy reasons, and was referred to as a tag axle because it had been "tagged" on at the rear.

    Soooooo............

    In the case of many of todays three axle MHs, which are usually front wheel drive, the rear two axles are drag axles and not tag axles, as they are not tagged on, but purpose built.

    Anorak moment over and waiting to be shot down :BigGrin:
    3 people like this.
  2. hilldweller

    hilldweller Funster

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    Just South of Manchester
    I've come across that logic before.
  3. Snowbird

    Snowbird Funster

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    Apr 24, 2009
    Location:
    Liverpool.
    All rear axles on front wheel drive vehicles are "drag axles" :Smile:
  4. knokinonabit

    knokinonabit Funster

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    Dec 28, 2011
    Location:
    Stokesley, North Yorks
    Yes, that is what I am trying to say really. :thumb:
  5. jonandshell

    jonandshell Funster

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    Dec 12, 2010
    Location:
    West Norfolk
    Why don't we have 'proper' RWD tag axle vans?

    I'd buy one!:thumb:
    1 person likes this.
  6. knokinonabit

    knokinonabit Funster

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    Dec 28, 2011
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    Stokesley, North Yorks
    Probably to do with floor/overall height and prop shafts/axles getting in the way of current floor layouts.
  7. knokinonabit

    knokinonabit Funster

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    Dec 28, 2011
    Location:
    Stokesley, North Yorks
    Also, as on modern trucks, it would probably not be able to lift when fully loaded to prevent overloading the drive axle.
  8. Snowbird

    Snowbird Funster

    Joined:
    Apr 24, 2009
    Location:
    Liverpool.
    They did. Hymer made one, the 750S on a Mercedes chassis. Damn good van it was too.
    1 person likes this.
  9. jonandshell

    jonandshell Funster

    Joined:
    Dec 12, 2010
    Location:
    West Norfolk
    With a chassis stretch, there's plenty of room behind our rear driven axle for extra trailing arms, airbags, dampers and an axle!

    Don't forget the Carmichaels Range Rovers and numerous 6 wheel Unimogs and Land Rover conversions about!

    Now I feel a project coming on! Wheres my welder? I'll drop a Kontiki body onto a Unimog in time for skiing. No chains required!!
  10. maz

    maz Funster

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    Out there somewhere
    It's a bit like the term 'winterised' when applied to Autotrails. :Wink:
    3 people like this.
  11. knokinonabit

    knokinonabit Funster

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    Dec 28, 2011
    Location:
    Stokesley, North Yorks
    Just use them all year round.
    Job done :BigGrin:
  12. JeanLuc

    JeanLuc Funster

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    Nov 17, 2008
    Location:
    Warwickshire
    I wonder how the term 'tag axle' came to be used so commonly with regards to motorhomes, given that there are no true tag axle vans made today?
    A tag axle doesn't have to be capable of being lifted from the road, although many on artic tractors can be. A Tag Axle is a 'dead axle' located immediately behind a driven 'live' rear axle. They are used on rigid vehicles as well as articulated tractors. Many coaches have tags, as do some refuse lorries. In the latter case, the tag axle may be steerable to facilitate manoeuvring in tight spaces. If the dead axle is placed ahead of the live rear axle, it is called a 'pusher axle' rather than a 'tag axle'.

    So, today's front wheel drive motorhomes with three axles and simply twin rear axled vans, not tag axled vans (bit like a large hobby caravan welded behind the cab!) :reel:
  13. Gromett

    Gromett Funster

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    Feb 27, 2011
    Location:
    UK
    I suppose tag axle is used as every van I have seen only has two axles. The extra axle is tagged on to increase the payload....
  14. ScotJimland

    ScotJimland Funster

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    Location:
    .
    Except PVCs... that's exactly what most motorhomes are .. a chopped Fiat van with a caravan on the back...

    personally, I prefer the articulated versions, far more practical :Wink:
  15. PaulyP

    PaulyP Funster

    Joined:
    Jul 29, 2011
    Location:
    Manchester
    Well thats mine changed under my profile. Twin rear axle, must remember that when i advertise it for sale.:BigGrin:
  16. Stephen & Jeannie

    Stephen & Jeannie Funster

    Joined:
    Aug 27, 2008
    Location:
    Gobowen near Oswestry !!
    Yea right !!

    I do, I live in mine, and the water freezes up at 4 degrees below etc.:Angry: Despite their inefficient lagging system !:Angry:
    That's why I am in Spain at the moment !!!!!!!!:Cool::Cool::Cool:
    2 people like this.
  17. aba

    aba Funster

    Joined:
    Oct 27, 2009
    Location:
    yorkshire
    then try to reverse it up onto levelling ramps :Rofl1::Rofl1::Rofl1::Rofl1::Rofl1:

    the proper way is to have a double drive pair of axles with diff locks at the rear then you get no loss of traction no matter what terrain your on.


    you will just sink instead:thumb::thumb:

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