for model boats - even full size - require a boiler of limited height
and an engine able to sit low in the hull for ballast purposes.
It is for this reason most boat engines are of the horizontal variety
relatively small flywheels, if any - depending on the style of engine
and the number of cylinders, and if a larger power
source is required the use of multi-cylinders is called upon.
lighter model boats oscillators
work well (as seen in the Pre-machined Model Steam Engine Kits link on
the left) although they are less
with fuel than a proper
steam engine, but far easier to produce for the
amateur model engineer with limited workshop facilities. In fact this
twin cylinder upright on the left has much simpler cousins
shown in the 'wobblers'
section for the
beginner to building steam engines to make.
Owing to the distances involved between the operator and the boat,
control using servo's for direction (forwards and reverse),
and engine speed is required. More often than not a spirit fired
is used in the much smaller scales,
moving up to gas
boilers, although there are many coal-fired
ones in use in the larger
scales that of necessity need regular ash removal, but these also
require a damper to restrict the air flow to the fire rather than a
simpler servo to control the gas supply.
Spirit firing is very hit and miss with regards to control for the
operator and very often your boat will simply run out of steam when it
is well out of reach, causing endless waits for the wind to blow it to
the side, but this has now moved on to running boilers with larger gas
is more predictable.
There are even regulators available now to control the gas flow
acording to boiler pressure - a great boon for the operator.
Check out the engines and kits on the left...
- open column single cylinder
Marine Engine -
no castings needed - twin
mid easy build
cylinder boat engine &
very basic format - drawings
|Simple steam engine and boiler
How to make a model steam engine
How to make a toy steam engine
Model boilers guide
Build a steam whistle (its not what you think)
Model water - steam pump