Fully machined and ready to run.  This is a P.M. Research 4C1 1/4 hp steam engine.  Not a toy, this engine utilizes a piston valve and has iron rings for high temperatures.  Mike Brown uses a similar engine with similar bore and stroke and rates it at 1hp.  This engine driving the PMA generator will put out 200 watts.   $950.00

Monotube Wood Fired Boiler

It is cheaper and easier to make the lower section with fire bricks, and simply rest the monotube coil on top.  After a lot of testing I have found it is easier to just use all 3/8" copper tubing.  The lower section is a water wall helical coil which picks up radiant heat from the fire.  Then on top, 5 spiral pancake coils receive heat from convection.  The whole assembly should be surrounded with 20 gauge steel sheet metal.  Controls are simple, and the engine runs as fast as the fire is hot.  If you over-fire the excess pressure is released from an automatic  dump valve included in the kit.  In addition a safety valve, water level control, fittings and throttle valve are included in the kit.  Optional steam whistle available.