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The original was posted on /r/Ultralight by /u/dueurt on 2024-10-26 10:57:26+00:00.
In preparation for a trip next summer, I'm trying to figure out which pot/windscreen/burner to bring, and how much alcohol fuel I need.
I currently own:
- TOAKS light 450 paired with an X-Boil 75-85 ultralight windscreen and X-Boil ultralight burner
- Evernew UL 1300 paired with a Vesuv windscreen and the X-Boil ultralight burner
- Trangia 27 UL (aluminium)
- Trangia 25 Duossal (aluminium/steel laminate)
The Trangia 25 weighs more than 1kg and is sized for 4, I'm going to ignore that completely. The Trangia 27 is still far from ultralight, but I've cooked with Trangias for decades, and consider it an interesting baseline.
So today I did an initial test to see fuel consumption of the 3 systems. Unfortunately my thermometer is broken, so instead of an exact temperature, I used a subjective "boil-ish" assesment. In reality i don't use anywhere near boiling water on trips, aiming for something that'll be quite hot when consumed. When I get a working thermometer, I'll do more testing.
The pots were filled with 300g of room temperature water (from the same 2L bottle that had been sitting indoors for weeks).
The same burner was used for all systems. On the Trangia, it was placed in the Trangia gel burner (basically a shallow aluminium holder that fits in the windscreen).
The burner was filled with significantly more fuel than needed, a) to avoid having too little fuel so the test had to be redone and b) because the burner is less hot when nearly empty. Future tests will try to narrow down exact fuel amounts, so I can use that for dosage on trips.
The burner is weighed immediately before being lit. Coincidentally, I hit the exact same weight for all 3 tests. When the water is boiling, the burner is extinguished and the lid is put on (not screwed tightly, but it is closed enough to make any evaporation negligible).
When the burner is cool enough to touch (~10s), it is weighed again.
Fuel is bio-ethanol for heaters. Ethanol content is 93% by weight (96% by volume). Denatured with isopropyl alcohol <1,5% by weight and butanone 1-5% by weight.
Test was conducted outdoors. There was no wind and ambient temperature was ~12°C/54°F. The burners were tested one at a time, placed on concrete slabs slightly above ground level (just because it was a convenient spot).
For anyone thinking "why the hell do you use an alcohol stove" - well, the day they make a canister stove that rivals an alcohol stove for silence, that's the day I might bring a canister stove on solo trips. Alcohol stoves aren't ever banned around here, and if there's a fire ban the canister stoves are banned as well. Actually in state forests here in Denmark, a burner used outside a designated campfire site must be enclosed (like a trangia which the regulations specifically mention). The ultralight canister options I know of wouldn't qualify. I'll add ground protection (aluminium foil or something) to the Vesuv burner to make it legal, so maybe increasing system weight 5g or so.
I registered approximate boil times just because 'why not', but it was just from glancing at the clock before and after, so take with more than a grain of salt. However, the difference between them was significant. Personally I don't give a shit if it takes 1 or 10 minutes, and if you do canister stoves are great options.
| System | System weight | Fuel consumption | Approximate boil time | Notes | |
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| | Evernew UL 1300, Vesuv windscreen, X-Boil ultralight burner | 187g | 7g | 5 minutes | Bottom of pot covered in soot, so fuel rich burn. Increased airflow or a bit of water added to the fuel might give better fuel economy. | | TOAKS 450, X-Boil 75-85 ultralight windscreen, X-Boil ultralight burner | 106g | 9g | 8 minutes | No soot on pot at all. Significant heat loss could be felt above. | | Trangia 27 w. inner pot, Trangia Gel burner, X-Boil ultralight burner | 492g | 7g | <2 minutes | Boiled so fast it went way past my subjective "boil-ish" into a violently roiling boil before I got it off the stove. Probably feedback heat increasing fuel evaporation. Pot was covered in soot on the bottom, even more so than the Evernew. |
The trip I'm preparing for is 9 days, and I'll probably do 4 boils/day (hot cocoa x 2-3 and dinner) for a total of 36 boils, bringing total fuel consumption to 252g for the Evernew/Vesuv and Trangia and 324g for the TOAKs/X-Boil. Total system weights including fuel for the trip (excluding fuel containers) would then be
- Evernew/Vesuv: 439g
- TOAKs/X-Boil: 430g
- Trangia: 744g
The Trangia is unsurprisingly right out. No matter the amount of optimization I do, there is no way I'll close a 300g+ gap. It is also bulkier than the Evernew/Vesuv, while simultaneously having a significantly smaller pot (1L vs 1.3L), and the handle is less convenient than the attached handles on the Evernew. The only thing the Trangia has going for it, is that the lid can be used as a frying pan. Well, the boil time was also very impressive, but that would actually be inconvenient with any real cooking.
The TOAKs/X-Boil is very small. For weekend trips it is super convenient, super compact, and the weight savings are much more significant (178g total weight for 8 boils, coming in 9g under the Evernew without fuel). The fact that I've never had any soot on the pot with that system is also worth bonus points (I've also used the pot on an open fire though, so it has seen its fair share of soot). But for a longer trip, the size becomes limiting. It is also the most vulnerable to wind of all 3 systems, although still quite good in the wind. And I suspect the 9g savings over the Evernew disappears when taking a larger fuel bottle into consideration.
The Evernew is very large for one person of course, but I'm trying to get rid of redundant equipment, and a 900ml would save me less than 25g (including windscreen) over the 1300ml. 600ml is in the same ballpark as the TOAKs, too small to cook for both dinner and a drink. I'll eat that 25g penalty for a pot that's more practical to cook with and large enough for two. The Trangia 27 will be donated to the local scouts or something. I'll keep the Trangia 25 for now - it fits a different niche: Canister stove for family outings.
Next up, dialing in fuel amount for the Evernew, and looking at mimimizing soot.