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SUL Windscreen for BRS-3000T Canister Stove
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Home › Forums › Gear Forums › Make Your Own Gear › SUL Windscreen for BRS-3000T Canister Stove
- This topic has 51 replies, 6 voices, and was last updated 4 years, 4 months ago by Graham F.
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Dec 4, 2016 at 10:09 pm #3438764
Interested for sure
Jan 2, 2017 at 8:13 pm #3442950Sorry for the slow response guys.
I tried an idea for larger pots, where the edges of the windscreen touch the bottom of the pot. This allows for any size pot, and stabilizes the windscreen.
Didn’t work worth a darn. Not enough exhaust area to run the stove at full blast. So I tried increasing the exhaust area and added two more intake holes too:
Better, but still not able to operate stove at full throttle, and very susceptible to wind. Enough so that I didn’t bother with formal tests.
I have a couple more ideas, but it will be some time until I get to them.
Jan 2, 2017 at 9:58 pm #3442963Hi David,
I like your designs and can appreciate the time you’ve spent testing. Like many on this forum, I have a BRS-3000T , but wanted a wind screen that would let it function without ‘flame flutter’ in at least moderate breezes. Having some spare aluminum flashing and some spare time I came up with this:
Sorry for the sideways image. I’ve found that ,at least with this design, there can’t be any air gap between the pot and windscreen on the up-wind side. The down-wind side is wide open as is the underside. Heat radiated onto the top of the canister increases its temperature slightly, but still passes the finger test. And ,importantly, the screen fits inside my 400 ml pot as well as reducing boil time by about 30%, again, in a light breeze. In a strong wind I’d set up in a more sheltered area.
It has enough air flow to allow full throttle operation, but in practice I only use about 50% throttle.
Your concept is a whole lot more elegant than this simple design and I look forward to seeing your perfected final iteration.
rob
Jan 6, 2017 at 10:45 pm #3443573Hey Rob, I thought I posted a reply earlier, but I don’t see it now. The most elegant design is the simplest one that accomplishes the task. I like your idea and reproduced it in titanium. Unfortunately, I could not get the screen to stay in place because it immediately got so hot that it drooped. I’m amazed your aluminum doesn’t melt!
Jan 7, 2017 at 10:27 am #3443601Is there any way to secure this to the third arm as well? That could take the sag out of it. I like this design.
Jan 7, 2017 at 6:14 pm #3443690David,
Curious, maybe your Ti screen is thinner than my Al flashing.I don’t have a micrometer so I can’t measure its thickness, but it’s pretty thin, but yet rigid enough to not droop as shown in the first photo below with the pot boiling. A friend gave me some of the flashing years ago so I have no idea what grade it is, but it’s very light and I cut it with scissors. I should have mentioned that the protrusions at each end that slot into the triangular openings on the BRS pot supports need to be ‘lobed’,( that is to say not straight-sided) so that they will lock into position when the windscreen is installed. You can see their shape in one of the photos below. The lobes need to be small enough to fit into the wider(inner) end of the pot support opening, but larger than the outer part of the pot support opening so that they are held in place via tension.
And Brad brings up a good point should you encounter drooping. So I made a hanging support for the third (middle ) pot support from a paper clip bent to shape that keeps the windscreen from drooping , whatever the cause. Hope this helps:
Rob
Feb 12, 2018 at 7:25 pm #3518022Robert K,
In the pictures of your windscreen I’m sure I missed the type of material.
Can you clarify for me please? I have some aluminum flashing and I like the design.
Thanks,
Newton
Feb 13, 2018 at 11:59 pm #3518259….my Al flashing.I don’t have a micrometer so I can’t measure its thickness, but it’s pretty thin, ….. A friend gave me some of the flashing years ago so I have no idea what grade it is, but it’s very light and I cut it with scissors.
Sep 2, 2018 at 5:02 pm #3554287Sorry to resurrect an older thread – I was wondering what the hole/slit in your windscreen was for.
Feb 4, 2019 at 1:43 am #3576667WELL SHUT MY MOUTH!
This is a much better windscreen than I built, and much lighter. Ti Goat get ready to take my money.
Tank youse veddy nice Mr.David. Much appreciated.
Feb 4, 2019 at 9:55 pm #3576750-With the open bottom, do you think the screen could wrap 360, or do you think that some airflow at the top is required?
-If airflow at the top is required, do you think that it would it be enough on a 360 design to have some holes punched on the lee side?
I am left wondering if a 360 wrap design might be more effective, and less fiddly to attach.
Feb 4, 2019 at 11:50 pm #3576774Posted this 17 gram BRS-3000T windscreen a few years back.
For more info go here.
Jun 1, 2019 at 3:14 pm #3595739Jun 1, 2019 at 8:13 pm #3595779nope
Jun 2, 2019 at 10:42 pm #3595951Full metal jacket for extra efficiency.
May 18, 2020 at 11:12 pm #3648025Just saw this video. Nice work. I wonder how well it works, and its weight?
May 19, 2020 at 8:20 am #3648064I missed this thread
Another design:
That gives you a heat exchanger effect also, about 10% efficiency improvement. Fits into pot. 1.25 ounces
May 19, 2020 at 9:02 am #3648080Thanks Jerry. The heat exchanger aspect is appealing.
Can it sit with a full pot of water, or do you need to separate it when coming off the stove?
What is the wire cincture/how fiddly is it?
May 19, 2020 at 9:10 am #3648082Yesterday I tested a proof-of-concept prototype of a new design roughly inspired by the MSR Windburner. No strict protocols followed, just wanted to see if it worked.
Cold tap water, outdoors in breezy conditions, three burns with and three burns without, stove setting not changed between burns. The burns were all done in pairs, first with and then without, at the same burner setting to eliminate that variable. Early results are very encouraging: average time with = 4:29 to boil, average time without 9:13.
Used .003″ stainless steel for this prototype. Mesh is 120 openings/inch. Weight = 1.196 oz/33.90 gm.
One of the things I really like about this particular setup is that I can use the same windscreen whether I’m burning alcohol, Esbits, wood, or butane.
I’ve ordered some Ti sheet, foil and mesh to make a pre-production prototype and will update this thread when it’s done.
May 19, 2020 at 9:43 am #3648092Cameron – #18 galvanized steel wire
You need to adjust the length so it squishes (springs) the aluminum to the pot keeping it on. It stays on quite securely.
I just leave it on the pot after the water boils. There’s some slight advantage to having a broad base (the edge of the windscreen) rather than a narrower base (the pot). I don’t take it off until I pack up.
May 19, 2020 at 9:46 am #3648093I like how not-fiddly this design is… Have you used it much or tested it for efficiency? Would love to see some data on it… Any issues with overheating without vents?
May 19, 2020 at 10:07 am #3648098who are you talking about? : )
May 19, 2020 at 10:09 am #3648099Oh, sorry, I hit reply on the design I was talking about, and assumed it would include a reference to the right post…
Sorry about the confusion – I was directing that at @Dan Y and his video above.
May 19, 2020 at 6:51 pm #3648242Just saw this video. Nice work. I wonder how well it works, and its weight?
Lots of info regarding the video can bee seen at this link:
https://backpackinglight.com/forums/topic/titanium-hx-windscreen-for-canister-stoves/
May 20, 2020 at 12:32 am #3648285Hey Jerry could you whack up another picture of your accordion type shield?
And a pic off the pot too if it’s not too much trouble-looks nice.
Ta.
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