Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

  I too have been bitten by this particular bug, too many times.
The only 'design' problem is the heater.  The bases are prone
to cracks and leak water when steaming.  They will run while
leaking underneath.  Just be careful.

The link below was the first you tube video I put up.
A KJ Miller trio running on air, taped by my missus.




The link below is for a video of three runs on steam, knitted together.



Just my two cents,
Wayne