Re: wheel types

On Sat, 29 Oct 2005 23:05:46 +0100, Ken Parkes
<cbuffer@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:

>On Sat, 29 Oct 2005 14:08:09 +0100, BH Williams wrote:
>
>
>>>
>> I've not seen spoked and disc wheels on the same axle, but sets with one
>> side having tread brakes and the other disc brakes are common, being a
>> feature of the HAA hopper family.
>
>That surprises me - I would have expected heavy braking to throw the wagon
>over to one side - assuming the wheels are coned.***
>
>> Not sure how wheels/axles are assembled
>> in the UK,but in France wagons carrying various sizes of wheels (without
>> axles) are common at Grande-Synthe yard, Dunkerque, there being a
>> steelworks nearby which manufactures them.
>> Brian
>
>Can't believe that the pairs aren't turned after fitting to the axles, a
>tiny discrepancy at the axle stub results in a large eccentricity at the
>wheel flange. Any fitters out there who can help us?
>
>***In fact the difference in braking efficiency is such that I would
>expect the wagon to leave the track. Do you really mean different braking
>on each side, as opposed to each end of the wagon? Imagine having
>calipers on the right side wheels of your car and drums on the left.
>
Train axles don't work like your car, there is no differential, so it
doesn't matter where on the axle you put the brakes the braking effort
is transmitted to the rails equally through both wheels hence no
leaving the track or throwing to one side.
Applying the brakes to only one wheel of the pair is a common
arrangement, mixing disc and tread brakes less so.
Keith


.

Relevant Pages

  • Re: wheel types
    ... >>> I've not seen spoked and disc wheels on the same axle, ... >>> side having tread brakes and the other disc brakes are common, ...
    (uk.rec.models.rail)
  • Re: Followup Question: disc brake adjustment
    ... They need no maintainance at all - see bleeding tip below, pads last ages. ... Wheels dont need to be kept dead true and you can keep riding after crude on ... To bleed your disc brakes add a couple of zip ties to pull the levers back ...
    (rec.bicycles.tech)
  • Re: Brake pad change botched?
    ... I think you'd have to work the brakes pretty hard for much heat to get through to the wheels. ... Just been for a quick drive only doing light intermittent braking, 2 miles out and back again. ... When I got there the wheels and calliper were stone cold, the disc was HOT:) When I got back the wheel was still ...
    (uk.rec.cars.maintenance)
  • Re: Utility Body Trailer-Update
    ... I would NOT swap the duallie axle for a regular pickup rear axle - ... wheels bolt not to the axle..but to the rims of the inside wheels. ... set of parking brake cables and yoke, ...
    (rec.crafts.metalworking)
  • Re: Rewheeling Hornby Dublo Coaches
    ... > Here is an update of these HD coaches. ... >> bearings in the bogie castings. ... The wheels are also all plastic, ... >> If Kevin can get hold of any modern wheelsets with similar axle ends ...
    (uk.rec.models.rail)