happen, the burner will sound quite different to normal and the blue
flame will be visible in the smoke box if viewed down the chimney
from a safe height. Should this happen, turn off the gas
immediately or damage may result and then re-light it. If the
problem persists and it is not possible to ignite the burner correctly,
then a dirty jet should be suspected and cleaned as detailed in the
Troubleshooting section.
For the first couple of minutes keep the burner on low. This is
important, as until it warms up, the flame will be a little unstable
and turning it up too much could cause it to go out. Also, with a
completely full tank, liquid gas could be drawn off instead of
vaporized gas, which can also extinguish the flame.
After a couple of minutes, the gas control valve can be opened
more to speed up steam raising. Open the gas regulator slowly.
The full range of adjustment (closed to fully open) is achieved
within the
first half to three quarters of a turn
of the gas regulator
knob any more is unnecessary.
RUNNING THE LOCOMOTIVE
When full working pressure has been reached (between 35 and
40psi), the safety valve will start to blow off steam. Steam
generation can be controlled by the gas regulator valve in the right
hand cab doorway. If the safety valve blows off frequently during
running, then too much steam is being produced, which wastes
water and gas. Turning down the burner will decrease the amount
of steam created. Conversely, if steam pressure is not maintained
during a run, then the burner should be turned up.
After a few minutes of running it may be noticed that the gas
pressure through the burner has increased. This is due to the gas
tank becoming warmer and so increasing the gas pressure. Simply
turn the gas down – this may need to be performed several times
during a run. The art of balancing steam generation to the
operational requirement by the adjustment of the gas control valve
will quickly be learned.
The standard gas tank has a duration of about 25 minutes, though
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