Please...

110 g Full Wt = 7.0 oz Empty = ?

and

220 g Full Wt = 12.9 oz Empty = ?

Thanks

Convert the net weight of fuel to ounces and subtract from the full canister weight to get the empty canister weight...

My empty 110 gm Gigapower canisters weigh 3 oz. For the larger 220 gm canisters, I don't use Giga, but Primus and MSR (this is because I scored cases of each brand on sale).

Primus 220 gm. full 13.25 oz, empty 5.55 oz. (net fuel 7.7 oz. on average)

MSR 220 gm. full 12.5 oz., empty 4.6 oz. (net fuel 7.9 oz. on average)

I too would like to see someone's full/empty weights for Gigapower fuel.

Snowpeak LiteMax (GST-120) my wt is 2.0 oz (57 g) on my scale
Was just a bit disappointed when I did not see 1.9 but I got over it
Two little grams : )

I boiled 3 cups (24 oz) or .7 L in MSR Titan Kettle (.85L capacity)
in about 4 minutes. I weighed the 110 g canister before = 7.0 oz
and 6.4 oz after. So used .6 oz

Trying to calculate how many times I can do that.

I'm assuming, if the empty wt is 3 oz then I have 4 oz divided by .6 or 6 boils

Thanks

That fuel usage sounds high to me. That's about double the fuel usage that my testing has shown. I'm using a MSR Pocket Rocket, MSR caniser and 1.3L Ti Pot with no windscreen.

Edited by dandydan on 04/17/2010 19:17:47 MDT.

Thanks John

It is actually converted on label - doh : )

220 is 7.76 so fuel is 5.14
110 is 3.88 so fuel is 3.12

Interesting to match what should be to actual observation. Like the stove weight. That's what got me wondering.

I will post some photos.

I opened it up full throttle. No windscreen, was breezy but did not seem to bad.

Tomorrow I will try my SUL-1100 Ti pot.

What fuel consumption are you getting?

was thinking diameter was more

i will try anyway

With MSR Pocket Rocket, 1.3L Evernew Ti Pot, no windscreen, + 60 F, mostly calm, outdoors, I observed:

2 cups water, Full Throttle = 6.9g (0.24oz) Fuel, 2:10
2 cups water, 2/3 Throttle = 5.7g (0.20oz) Fuel, 2:40
4 cups water, Full Throttle = 12.9g (0.45oz) Fuel, 5:00

Based on my results, I would expect about 0.34oz of fuel used at full throttle for 3 cups. Your conditions would be more fuel intensive with the higher winds, but you're recording about 80% higher than I'm extrapolating which is a lot higher.

I wonder if the small pot diameter is hurting you. A windscreen like the MYOG one currently posted on the front page of BPL would be worth researching.

Edited by dandydan on 04/17/2010 19:43:03 MDT.

Mine also weighs 2.0 ounces. But the pot supports are better than the Pocket Rocket I used previously. More stable than the Pocket Rocket also.

I don't run mine at full power to boil water. I've never really timed the boil times, but it seemed to be about the same as my Pocket Rocket for 2 cups of water in a Brasslite 900 ml mug.

Edited by jdw01776 on 04/17/2010 19:46:02 MDT.

Snow Peak Gigapower 110g fuel canister:

Total weight when full - 7oz. - of which:

fuel weight --- 3.88 oz.
empty can wt. - 3.12 oz.

Thanks Ben

I will test again tomorrow

Good idea - will look closely at windscreen

Just like the government has standards for automobile fuel economy for city and for highway, we may need to develop standards for stove fuel economy for Trail or for Garage.

--B.G.--

The government can have my stove when they pry it from my cold, dead couscous.

Hi George

> 220 is 7.76 so fuel is 5.14
> 110 is 3.88 so fuel is 3.12

Not quite. 220 g or 7.76 oz is the net weight of fuel in the canister. Ditto 110 g (3.88 oz). The canister is extra.

Canisters typically weight between 120 g and 140 g, depending on source, although the Coleman Powermax canisters weigh 68 g and 86 g.

Cheers

From Snow Peak’s GST-120 packaging and instructions:

Heat Output 11,200 BTU’s
Gas Consumption 233 g/h

Their tests
Burn Time 50 min (room temperature 20C (68 F)

Boil Time 4’ 25 “ average based on 5 tests
for 1 L water
with room temp 23C (73.4F)
with water temperature 20C (68 F) start
and 95C (203F) end

So...

Per minute gas consumption
233 g / 60 min = 3.88 g/m

My planned test today...

1 L water in SUL-1100
Water will be 20C
Outside temp 66F or so

If takes 5 min to boil the L
Then 3.88 g x 5 min = 19.4 g (about 20 g)*

My 110 canister now weighs 6.4 oz (181 g) before

Should be 181 g - 20 g* = 161 g

Will report results later...

Note: 110 -> 3.88 g net fuel + about 3 oz (85 g) = about 7.0 oz
I'm sure my tests will result in an empty canister : )
Thanks Roger

All water temps about 68F/20C
Outside temp about 66F/19C

No wind
5 minutes to boil 1 L water

Wt before 182 g
Wt after 164 g
Consumption 18 g

Therefore I will plan on average of about 5-6 boils of 1L for a 110 g canister

Or double for 220 g canister, 10-12 boils

Wind makes a difference, of course. Will try windscreen in future for wind.

Just for comparison, tested my Primus EtaPower Trail.

Boiled 1L water in 3 min and consumed 11 g of Power Gas (Winter Mix)
The integrated system is more efficient, but weighs more, of course. During the last two winters I used it during cold times, but not a lot. I used the 450 g canisters so had not taken the time to measure consumption during three-season conditions because I wasn’t going to pack it then.

Hi George

18 g per litre is high. That amount is to be expected if you run the stove flat out like the manufacturers specify, but you will get a lot better fuel consumption if you run the stove at medium power. 'Flat out' means a lot of waste heat lost up the side of the pot - a well-known problem.

We take ~9 g for 0.75 L for morning tea.

Cheers

+1.

Especially for narrower pots, there is no good reason to fire up the stove to full blast.

Roger and Ben,

Thanks for you advice.

Just tested 3 cups (.75 L) at 1/2 turn (full is a little more than 1 turn).

Took about 6 1/2 minutes and consumed 10 g.

I can live much better with that : )