[pct-l] Isobutane Canister performance

Wed Sep 11 11:55:59 CDT 2013

Sorry to hear with all your experience you are almost a decade behind on
your definitive findings.  Here is a 8 year old study about canister
stoves.
http://www.backpackinglight.com/cgi-bin/backpackinglight/canister_stove_faq#.UjCe78aWZ8F

Sorry it shreds your findings to pieces.  BPL has a ton of wonderful
articles just like this one.  Maybe someone will get you a subscription for
the holidays.  People who back their findings with data.  Not half thought
out supposition.

On Wed, Sep 11, 2013 at 11:25 AM, Mary Kwart <mkwart at gci.net> wrote:

>
> I have been asked by several people what my experience with isobutane
> canisters have been on this list serve. I can give anecdotal results. I am
> a fan of anecdotal results because it reflects real experience and not
> merely "data". I have 30 years of experience using "data" in the outdoors
> through my job and have often found it takes a back door to so-called
> anecdotal experience. My experience with isobutane canisters has been in a
> wide range of multiple elevations and temperatures. Hiking on the Colorado
> Trail, the Grand Enchantment trail through New Mexico and Arizona and on
> the Arizona Trail. I have noticed the longevity of using isobutane for
> several years, but decided to quantify it more for my own use and for the
> use of others. I believe the factors you consider stumbling blocks to good
> advice are minimal. We do not need to have every factor quantified down to
> the gnat's ass in order to give or get good advice from valid and far
> reaching outdoor experience.
> --Fireweed
>
>
> ----- Original Message -----
> From:
> "Matt Signore" <mpsignore at gmail.com>
>
> To:
> "Mary Kwart" <mkwart at gci.net>
> Cc:
>
> Sent:
> Wed, 11 Sep 2013 08:29:20 -0500
> Subject:
> Re: [pct-l] Isobutane Canister performance
>
>
> I will bite.  Why then did you omit the 5 weeks data collection in
> Colorado from your original post?  Is it because a huge hole was poked in
> your unverified theory?  You seem to throw in the extra five weeks of data
> you gathered as an after thought.  To steal from reddit "pics or it didn't
> happen".
>
> You do realize there is a different 3 season mix and winter mix by most
> isobutane canister manufacturers.  Hmmm I wonder why?  Is it because cold
> temperatures effect the burn rate of canister fuels?
>
> You say it was colder in Colorado.  Well how cold?  Gathering half the
> data and omitting half of that data makes you about a quarter of the way to
> a failing grade for 8th grade science class.
>
> Also cook pot dimensions will provide different results on boil times. You
> didn't even mention what you were boiling the water in.  Did you use the
> same cook pot for both trips?  Was it a rolling boil or you just saw a few
> bubbles start to form?  You provide very little hard data other than
> weights.  Basically your original post was half thought out and
> scientifically invalid.
>
> I know this may come off as harsh, but coming to the public with a half
> thought out study is just more list fodder.  Fireweed, this is the part
> where you get to respond back pedaling with no hard data.
>
> Note I kept this off the list to be nice.  If you wish to bring it public
> again.  There are more than a few SERIOUS studies that you can easily find
> with a Google search that are done by scientists and engineers in the field
> on burn rates.  You didn't discover anything.  You just puked a half
> thought out idea on the list.
>
>
> On Tue, Sep 10, 2013 at 10:54 PM, Mary Kwart <mkwart at gci.net> wrote:
>
>>  Hi:
>>
>> I had the same results using the same size and type isobutane canister on
>> 5 weeks on the Colorado Trail at an average elevation of 12,000 feet and at
>> colder temps.
>> --Fireweed
>>
>>
>>
>> ----- Original Message -----
>> From:
>> "Matt Signore" <mpsignore at gmail.com>
>>
>> To:
>> "Mary Kwart" <mkwart at gci.net>
>> Cc:
>> "pct-l" <pct-l at backcountry.net>
>> Sent:
>> Tue, 10 Sep 2013 08:02:37 -0500
>> Subject:
>> Re: [pct-l] Isobutane Canister performance
>>
>>
>>
>> I hope the outside temperature stays the same for all your hikes. Same
>> with the water temperature before being put on the stove.  Make sure to
>> stay at the same elevation for every meal.  Otherwise you will find all
>> your calculations are unreliable in other conditions.  Just a few
>> considerations.
>>
>> Matt Signore
>> pcthandbook.com
>>
>> On Tue, Sep 10, 2013 at 12:15 AM, Mary Kwart <mkwart at gci.net> wrote:
>>
>>>
>>> Hi, all:
>>>
>>> I just finished hiking the Oregon section of the PCT and finally got
>>> to definitively figure out how much fuel I use. I packed an MSR
>>> isobutane cartridge that had an 8 oz net weight. I boiled 1 3/4 cup of
>>> water daily and put the boiling water in a freezer ziplock with the
>>> food in a cozy to cook. I used a snow peak canister stove attachment
>>> and a titanium pot. It took 6.1 grams of fuel to boil 1 3/4 cup water.
>>> I still had about a quarter of the fuel canister left after I reached
>>> the Washington border. Now I know how to gage what's left in all my
>>> partially used canisters at home. I can get about 37 days of 1 boil a
>>> day from a larger MSR canister.
>>> --Fireweed
>>>
>>>
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>>
>>
>>
>> --
>> Matt Signore
>> pcthandbook.com
>>
>>
>
>
> --
> Matt Signore
> pcthandbook.com
>
>

-- 
Matt Signore
pcthandbook.com