Re: Which gauges for track construction?
Posted: Mon May 07, 2012 1:41 am
Keith and Russ, that’s much appreciated.
I had missed the advice in the Exactoscale instructions about gauge widening, but now note that they only advise this for radii of less than 1500mm – about 5.7 chains – at which point they recommend GW of +0.2 or +0.3mm and use of check chairs with the wider (0.8mm) spacing.
To achieve gauge widening through a crossing the conventional technique would appear to be to fix the stock rail to the wider gauge and rely on the check chairs with 0.8mm spacing to set the check rails to CG. Presumably, however, it would be feasible to reverse the procedure by gauging the check rails to CG and relying upon their 0.8mm spacing to set the associated stock rail to a widened gauge. Any reason to prefer one approach over the other?
I can see the merit in an increase in the BB setting and had been toying with the idea of taking this course anyway, assuming my skills permit it.
I had missed the advice in the Exactoscale instructions about gauge widening, but now note that they only advise this for radii of less than 1500mm – about 5.7 chains – at which point they recommend GW of +0.2 or +0.3mm and use of check chairs with the wider (0.8mm) spacing.
To achieve gauge widening through a crossing the conventional technique would appear to be to fix the stock rail to the wider gauge and rely on the check chairs with 0.8mm spacing to set the check rails to CG. Presumably, however, it would be feasible to reverse the procedure by gauging the check rails to CG and relying upon their 0.8mm spacing to set the associated stock rail to a widened gauge. Any reason to prefer one approach over the other?
I can see the merit in an increase in the BB setting and had been toying with the idea of taking this course anyway, assuming my skills permit it.