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Re: "Cobalt" stove for Heineken pot

Posted: Wed Jan 07, 2009 3:49 pm
by hoz
I copied this stove today using a DIY cobalt blank (Thx Zelph!) and a strip of lightweight steel from a mandarin orange juice can. No fiberglass wick in the folds of the cobalt , but I used a strip of Kevlar felt as an interior starter wick. Super glued to the inside of the stand strip. The felt is left over from installing skid plates on my canoes.

Drill pattern is a #60 wire bit around the top with approx 1/8" spacing.

Test was in 70 degree kitchen, using tap water.
Stove was allowed to cool between burns.

Small IMUSA mug, 2cu H2O

First burn with 1 oz alky, bloom 1 min 30 sec, boil 10 minutes, total burn 12:30 minutes. (Enough to "warm" another cu H2O). Pattern excellent for IMUSA cup.

Dissatisfied with the bloom time I enlarged 8 of the holes evenly spaced around top to 1/16"

Second burn 1oz alky, 1:32 bloom, boil 9 min, total burn 11:15 min. (Barely warmed second cu H2O). Again good pattern under cup.

Started to suspect lack of interior glass wick to be the cause of the late bloom. Still I enlarged 8 more holes to 1/16".

Third burn with 3/4 oz alky. Slow bloom, at 1 min I added a few drops to base pan and lit. Instantly got bloom. (Along with some flare overflow from stove). Boil 9 min, out at 10. Pattern starting to lap cup sides, but still good for IMUSA cup.


Next going to add exterior fiberglass priming wick to get a little "boost to bloom" but going back to #60 bit @1/8" spacing. .

Re: "Cobalt" stove for Heineken pot

Posted: Wed Jan 07, 2009 6:58 pm
by Vibe
I found that mine bloomed quite a bit faster with a pot held 1/2"or so above the stove.And after I added the "Grill" to it I could put the pot on the stove right afterwards.

Re: "Cobalt" stove for Heineken pot

Posted: Wed Jan 07, 2009 7:04 pm
by hoz
Vibe wrote:I found that mine bloomed quite a bit faster with a pot held 1/2"or so above the stove.And after I added the "Grill" to it I could put the pot on the stove right afterwards.
R ur jets drilled right on the top edge, (facing up)?

Re: "Cobalt" stove for Heineken pot

Posted: Thu Jan 08, 2009 12:27 am
by Vibe
hoz wrote:
Vibe wrote:I found that mine bloomed quite a bit faster with a pot held 1/2"or so above the stove.And after I added the "Grill" to it I could put the pot on the stove right afterwards.
R ur jets drilled right on the top edge, (facing up)?
No. About 5/16"-3/8" down around the outside.

Re: "Cobalt" stove for Heineken pot

Posted: Thu Jan 08, 2009 7:35 am
by Ridgerunner
My thinking to get a quick bloom time would be to put the jets in the top rolled edge and use a pot support similar to the Etowah stove or a piece of stainless hardware cloth rolled to fit inside like the Fancee Feast but allowing the starter flame to make direct contact with the jets.You would want the pot suppoet to stick above the burner 3/4" to 1" for best performance. It would then accomadate the Heine pot and a regular pot. ;)

Re: "Cobalt" stove for Heineken pot

Posted: Thu Jan 08, 2009 7:40 am
by oops56
Ridgerunner wrote:My thinking to get a quick bloom time would be to put the jets in the top rolled edge and use a pot support similar to the Etowah stove or a piece of stainless hardware cloth rolled to fit inside like the Fancee Feast but allowing the starter flame to make direct contact with the jets.You would want the pot suppoet to stick above the burner 3/4" to 1" for best performance. It would then accomadate the Heine pot and a regular pot. ;)
Ridgerunner that how i fixing to mine in a way dont give it away got a blamk ine coming :lol: :lol:

Re: "Cobalt" stove for Heineken pot

Posted: Thu Jan 08, 2009 7:41 am
by oops56
oops56 wrote:
Ridgerunner wrote:My thinking to get a quick bloom time would be to put the jets in the top rolled edge and use a pot support similar to the Etowah stove or a piece of stainless hardware cloth rolled to fit inside like the Fancee Feast but allowing the starter flame to make direct contact with the jets.You would want the pot suppoet to stick above the burner 3/4" to 1" for best performance. It would then accomadate the Heine pot and a regular pot. ;)
Ridgerunner that how i fixing to do to mine in a way dont give it away got a blank one coming :lol: :lol:

Re: "Cobalt" stove for Heineken pot

Posted: Thu Jan 08, 2009 6:26 pm
by Ridgerunner
I have not had the chance to test these stoves yet but my thinking is that the cobalt with the wick in the walls and top edge jetted, should work like a Trangia. Probably not as well but hopefully close. ;)

Re: "Cobalt" stove for Heineken pot

Posted: Thu Jan 08, 2009 7:39 pm
by hoz
Ridgerunner wrote:My thinking to get a quick bloom time would be to put the jets in the top rolled edge and use a pot support similar to the Etowah stove or a piece of stainless hardware cloth rolled to fit inside like the Fancee Feast but allowing the starter flame to make direct contact with the jets.You would want the pot suppoet to stick above the burner 3/4" to 1" for best performance. It would then accomadate the Heine pot and a regular pot. ;)
I used hardware cloth for the stand today. It turns it into an open stove instead of pressurized when using a solid strip. The alky (3/4 oz) burned up faster (7:35 min) and didn't boil, BUT IT DID BLOOM IN :35.

Re: "Cobalt" stove for Heineken pot

Posted: Thu Jan 08, 2009 8:42 pm
by Ridgerunner
hoz wrote:
Ridgerunner wrote:My thinking to get a quick bloom time would be to put the jets in the top rolled edge and use a pot support similar to the Etowah stove or a piece of stainless hardware cloth rolled to fit inside like the Fancee Feast but allowing the starter flame to make direct contact with the jets.You would want the pot suppoet to stick above the burner 3/4" to 1" for best performance. It would then accomadate the Heine pot and a regular pot. ;)
I used hardware cloth for the stand today. It turns it into an open stove instead of pressurized when using a solid strip. The alky (3/4 oz) burned up faster (7:35 min) and didn't boil, BUT IT DID BLOOM IN :35.
Will be interesting to see if having the internal wick makes a difference?