[Stoves] Changing rate of pyrolysis front in TLUDs

[Crispin Pemberton-Pigott]

Dear AJ

>Anyway to my mine a pressure difference that changes by a factor of 4
>isn't insignificant, what is interesting is that Dale's report doesn't
>indicate there is a big change in power, and power should directly
>relate to primary air (even though this is just the driver for
>pyrolysis in a tlud and the char is retained and not completely
>gasified).

I hope my more detailed message to Paul clears that up.  It is a small 
change in absolute and relative terms, plus the effect of the collapsing 
char will assist to keep the power level constant.

Regards
Crispin