Tincanium Boiling test

["New Dawn Engineering /ATEX" <crispin@newdawn.sz>]

Dear Stovers

I have tried with the only can reasonably available to me to do the 1 litre
boiling test.  The can I have is 125 dia and 295 high.  When it has 1 litre
in it there is still more than 50% air space.

I put together a newspaper (4gm), grass (6gm) and pine (126gm) fire in the
same stove I used on Monday.

Because they do not have metal lids and the two I have are plastic topped, I
decided I would hope the boil would take place before the lid melted.  I cut
two holes, 1 x 2mm and 1 x 10mm and put a 10 cent coin over it - about the
size of a nickle, or a little bigger.

The water temperature was 28 C and the ambient terperature was 32.

I measures the time from initially lighting the paper (lit paper, started
watch).
I put the lighted basket grate in the stove, put in the pot grate, the pot,
and two paint can chimneys (not 3 like the other tests, so I could see the
coin move).

The fire got going very quickly as it didn't have much jammed into the
grate.  The plastic top melted and fell in at about 40 seconds and the water
bubbled and hissed and bubbled noticeably at 55 seconds.  This would
definitely have met the penny-kicking 'boiling' criterion if the lid had
remained in place.

Looking at the water in the can, I don't think you would have called it
'boiling' if you were here, but it certainly bubbled hard before 60 seconds.

The tin is so thin that the heat on the side at the water line and the
bottom centre runs straight into steam.

So if any of you want to come by I can make you a (very) quick 5 cups of
coffee, it will only take a minute.

Regards
Crispin


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