If only that is true. Interestingly even thou the 520s can be converted to standard, it is still impossible to run a 520 class into the NSW system because of the size of cylinders. Both the SAR and VR system have generous pistons but the NSW locos, even the mighty garrets, the 38s etc they all have smaller cylinders due to certain restrictions i.e. the old English type platforms. This is why, to make up for the smaller pistons, the 38s had the highest working steam pressure in Australia at 245psi. However for todays condition I believe 3801 has been 'detuned' to 215 psi however 3830 still has a '245' boiler.
If only that is true. Interestingly even thou the 520s can be converted to standard, it is still impossible to run a 520 class into the NSW system because of the size of cylinders. Both the SAR and VR system have generous pistons but the NSW locos, even the mighty garrets, the 38s etc they all have smaller cylinders due to certain restrictions i.e. the old English type platforms. This is why, to make up for the smaller pistons, the 38s had the highest working steam pressure in Australia at 245psi. However for todays condition I believe 3801 has been 'detuned' to 215 psi however 3830 still has a '245' boiler.