All of my engines have stainless steel Rosebud grates with as many holes as can be fitted in the given space. Us Australians are going through a change as our long time char fuel is no longer available and we are having to experiment with various fuel mixes. Where once we didn't have any clinkering problems we now do. At our club we are currently using a mix of Welsh Steam coal, Welsh dry and small Baccus char. While it is not as good as the old stuff it seems to be working out OK although the fire needs to be dropped and cleaned after about 6-8 hours steaming. I have no intention at this stage to change the grates to the bar type. Barry
I understand the benefit of a rosebud grate is it's ability to allow burning of low grade cola. Although I am going to try one in my super simplex and Springbok, just to see what difference it does make. I know there's been some discussion facebook about them and their success. My goal is to see if they reduce ash through a more thorough burning, watch this space. From some research I believe 15% open area is what is quoted as ideal.
Member of Southampton Society and Fareham Society. Running a Super Simplex, commissioned a new build B1, A3 and Pansy yet to be rebuilt.