by mrennie » Tue Apr 09, 2013 10:00 am
If you have the coal at 100%, it means the fire mass is way above the ideal level, which in turn means that the fire is being smothered ... not enough oxygen reaches it all and unburnt coal dust goes up the stack.
As for the water, it's better to have it lower than 100%. If it says 100%, which is the most the F4 HUD will show, it could actually be above 100% (higher than 1.0 on the F5 display). If it's really higher than 100%, you're in danger of priming, which is when water overflows into the steam collection dome and floods into the cylinders. In RW, that translates into a huge loss of power. The priming level is set in the blueprints. It's typically at something like 1.1 or higher.
You can cheat a bit by using the F5 HUD to see if the steam generation rate is higher than the steam usage rate. If it isn't, then bring back the reverser (less steam goes into the cylinders on each stroke so more stays in the boiler and raises the boiler pressure).
One thing about the dampers that can be a bit confusing is that in the F5 display, it says Dampers On or Off. On means open, off means closed. If the dampers are open, more air reaches the fire through the grate, so you get a hotter fire and higher rate of steam generation, and more power.