Ok the Hobo Stove and meths can went into action today.
The results were a mixed bag really.
First the good.
50ml of meths filled the can and had a burn time of 18 minutes, the flame was fierce and would of boiled multiple water pots / 1 large pot.
As the boffins would probably say 'This is excellent energy density output'
With this test performed I felt the rest would be a formality, how wrong I was!
The can stove 'worked', flame came out but as Yar said there were some issues with flame out and with the hobo stove in situ with the combustion
chamber installed the flame would cut out almost immediately once a water pot was on top. Oxygen starvation, so I drilled some holes in the chamber.
Still no good.
Next, I removed the combustion chamber, this time the hobostove flame kept going, but then went out again after a short while once the water pot went
I tried it without the hobo stove (just water pot sitting on the meths can flame pot) and it worked a treat, the pot boiled fairly rapidly after about
1. The wind, while channeling the air and feeding the flame, did not allow the jets to ignite and take full effect.
That said being a first attempt my fabricating skills might be to blame for that.
2. The cans design means that, as the meths level gets lower, the likelyhood of 'flame-out' increases.
3. The vapour and fumes is nearly intolerable. It really reeks like the devils own brew!
This may be due to the meths variant I was using (purple coloured stuff) or maybe the meths itself (i suspect the latter).
I ended up having to wear a half-mask (which helped) to complete the trials but even then I began to feel a little nauseous so the whole
'meths-as-a-fuel' thing is a no-go for me. If I was in the field I really would not consider it an ideal solution. You could orientate yourself
around so you're upwind but the reeking stuff will likely foul out your pack and kit as you keep using it.
Dar, do you use the purple meths?
Forage for wood, twigs and scrug an alternative source of fuel for the Hobo and only use meths in emergencies.
Liquid petroleum would be a possible alternative.
It cost me £3 for 500 ml of meths. I can get a canister of camping gas that will last as long, if not longer for almost the same price.
Having said that, this is a good back-up to have if supplies are tight.
[edit on 14-9-2008 by WatchRider]