Thank you Jan!

We went for a Trangia because an Origo was not available, but also because we wanted something removable (with four in boat like mine space is an issue) and we thought that with a Trangia we could switch from alcohol to gas if not satisfied with the fuel type (you are right Asmat).  
I find too that refilling a lit burner is quite a stupid idea and cannot imagine someone just thinking about it. When we run out of fuel we remove the wind shield, wait till the burner cools and refill using the Trangia bottle. This has a very smart dispenser which makes very difficult to pour fuel out of the burner!
About speed, well when we cook in our 6,58 m boat we tend to make something easy and quick. The temperatures during the Italian summertime, even in the norten Adriatic see, are well above 30 degree at 19:00. This helps by boiling water but doesn’t make attractive spending much time down below with the stove lit. Anyway when cooking in holiday we don’t look at the clock.  

The two IKEA L bolts fit perfectly into the two fissures on the basement that are built in for passing the webbing that holds the Trangia together when packed. I just needed to drill two holes in the table to fix the stove…cheap and easy.

Cheers Mauro 

That's great Jan - a comparison of the two stoves by someone who owns and uses both.

Not looking for "hair-splitting" comparisons - just that there is such a massive difference in price, it was natural to wonder if there was much difference in performance.

(Come on Jan - surely you are not suggesting that efficiency is "un-junklike" ? These days? Very junklike, if you ask me. Anyway, both stoves are evidently very simple to operate and I am sure we all agree that is very junklike.)

I don't think anyone came up with the idea to try filling a liquid fuel stove while it is alight - that was really just part of a general comment that even ethanol needs to be treated with respect.

Actually, I did not know the stove comprised a simple open bowl of liquid which would spill if tipped over. Perhaps the clunky Origo with its big flat body footprint is much the safer option. Still, if one is careful I am sure the Trangia has its place, as you say. Mauro seems to have a clever way of clamping the stove to make it secure when in use, and easily removable for filling when not in use. It would be small enough too, to fit comfortably into a swung housing, which would be my preferred type of installation.

By the way - thanks for the more realistic performance figures Arne - the figures quoted by the agent here amount to false advertising. It's got me curious now - I've decided to buy one and see for myself how the two compare. 

I want to be "chilled out" Jan, but sometimes I get impatient, like when I want a quick cup of coffee, "chilled" just isn't the word for it - I want hot! hot!    now!

Graeme wrote:

Jami: I’m very happy with the Origo. It might be of poor workmanship, but then again the simplicity is a big plus.

Thanks for the comment Jami. Simplicity is indeed a big plus and perhaps I was unfair to denigrate the quality. The stainless steel body is crude, but OK - what I really meant was, it isn't very impressive, when you consider the cost of it.

According the the advertisement the Trangia burner unit costs $36 and they claim 5 ml of spirit will heat l litre in 10-15 minutes.

It doesn't say what volume the tank holds, but on the face of it, it does still look pretty good value for money.

Of course, filling it or spilling the fuel anywhere near a naked flame would be dangerous (the least dangerous of all liquid or gaseous fuels, but still dangerous).

I'd be keen to hear any other comments. How long does it run on a tank full Mauro?

Well that depends on how hot the water was to begin with and how hot the heated water was.

To bring one litre of water up from +20 to 100°C, it takes 4.184 x 80kJ= 334.7kJ. It takes thus 334.7/29.7 = 11.3 gram alcohol to produce that energy. 
Even with a 100% efficient burner, those advertised 5ml will heat less than half a litre. A really super-efficient stove-pot combination is needed to boil 1 litre on only 20ml of spirit.

My best combination stove-Elocs kettle on my Origo 1500 resulted in 16g spirits to boil 0.5l of water.

Arne

Edit 20240817:
In the text above I have used 29.7 kJ/g as the specific burn energy for ethanol. I guess that is the upper value. The practical lower value is 26.5 kJ/g.
In that case, it would take a 100% efficient burner 334.7/26.5 = 12.6g ethanol to produce that energy.

Anonymous wrote:

According the the advertisement the Trangia burner unit costs $36 and they claim 5 ml of spirit will heat l litre in 10-15 minutes.

It doesn't say what volume the tank holds, but on the face of it, it does still look pretty good value for money.

Of course, filling it or spilling the fuel anywhere near a naked flame would be dangerous (the least dangerous of all liquid or gaseous fuels, but still dangerous).

I'd be keen to hear any other comments. How long does it run on a tank full Mauro?

IIRC the Trangia burner can take a bit over 1 dL (100 mL): based on the website the diameter is 75 mm and height 42 mm, and you are only supposed to fill it 2/3: so 100-120 mL is probably a safe max. With safe filling you get about 20 min of flame time.

And you are correct: attempting to refill a lit Trangia burner seldom ends well. I always lift out the burner out of the wind shield when refilling: if burning it will be to hot for my bare hand.

Hi Graeme,

 I don’t have any time measurements. Whit the burner filled up to the halve we were able to boil water for 1kg “penne”, cook the “sugo al pomodoro” and toast “pinoli” for the salad…

Italian style :)

ciao