roundhouse TALIESIN, Owner'S Handbook Manual, Page: 10 / 24

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 shown in the ‘Gas System’ 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
vaporised 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 to
about one full turn.
The full range of adjustment (closed to fully open) is achieved
within the
first full rotation of the gas regulator knob any more is
unnecessary.
RUNNING THE LOCOMOTIVE
If you are familiar with running Roundhouse steam
locomotives, you may find Taliesin a little different. All models
have a unique ‘feel’ and this single Fairlie is no exception and
requires a little more driving than some of our other
locomotives. Several factors come into play e.g. large
diameter driving wheels, long flexible steam pipe, inside valve
gear and valve chests and a separate articulated power bogie,
all contribute to the overall performance. It is also important to
maintain a good water level at all times using the water top up
system.
When full working pressure has been reached (about 40psi), the
safety valve will start to blow off steam. Steam generation can be
controlled by the gas valve in the cab. 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
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