SUL Windscreen for BRS-3000T Canister Stove

Interested for sure

Sorry 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.

Hi 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

Hey 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!

Is there any way to secure this to the third arm as well?  That could take the sag out of it.  I like this design.

David,

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

Robert 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

….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.

@rob-k

Sorry to resurrect an older thread – I was wondering what the hole/slit in your windscreen was for.

WELL 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.

@rob-k

-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.

Posted this 17 gram BRS-3000T windscreen a few years back.

For more info go here.

@casey bowen

does the windscreen melt your jetboil cozy?

nope

Full metal jacket for extra efficiency.

Just saw this video. Nice work. I wonder how well it works, and its weight?

I missed this thread

Another design:

That gives you a heat exchanger effect also, about 10% efficiency improvement.  Fits into pot.  1.25 ounces

Thanks 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?

Yesterday 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.

Cameron – #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.

I 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?

who are you talking about? : )

Oh, 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.

Just 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/

Hey 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.