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[steam up]

 
After tweaking my home made ceramic burner I set off for the pond with what I thought was a more efficient flame (nice red/yellow glow). All seemed well until I notice a change in the noise made by the burner. I brought the boat in and could immediately smell burning timber.
Once home I tried out the steam plant again all seemed well until the burner changed pitch.On inspection it looked like the burner had gone out but I could hear the flame, only thing was it was under the ceramic burner. Things quickly became very hot hence the burning timber.
Sorted now with adjustment of the gas jet position and clearly a lesson learned.
 

[derekwarner]

steam up......without knowing the vessel or boiler layout and if sufficient air space gap is not available, you could consider a layer of aluminium foil....then a layer of Kay-o-Wool followed by another layer of aluminium foil...I have read an article here on MBM where the Kay-o-Wool material was pre soaked in water to attain & preset the curvature of a boiler shell
The aluminium foil probably has minimal heat insulating qualities, however does offer protection from water, steam or condensation from soaking in to the Kay-o-Wool ........Derek

[steam up]

I have sailed the model with no problems a number of times now with no problem until I changed the position of the gas jet,with the result I have described.
I think all is well now just passing on as a matter of interest and a warning to others.