Advice: Windscreen Cannister Top Stove

Discussion about making bushwalking-related equipment.

Advice: Windscreen Cannister Top Stove

Postby adventuremum » Tue 01 Jun, 2021 7:22 pm

Hi Bushwalk Stove Brains Trust
I want a Windscreen for my Soto Windmaster. Using:
    4Flex pot support: D 145mm
    Snowpeak 1 litre pot: D: 150mm, H 74mm
Found this https://www.flatcatgear.com/shop/ocelot-soto-windmaster-4-flex/ but only works with 4 flex post support folded, not extended, and maximum diameter pot of 107mm
Jon, from flatcat said
'I have looked into it and the design just does not scale up to work well with larger pots.  If it could be done, I would have done it.'

Not being crafty at all, I thought I'd just go with 3/4 wrap windscreen, unless anyone has any other ideas???
Somewhere...Roger C said
a good windscreen needs to be half-way up the side of the pot,  at least a 3/4 wrap and you need a gap 'right around the pot' of about 15 – 20 mm.
Others suggest  lesser gap all around the pot: 3/8" -1/2 " gap (10-13mm) http://qiwiz.net/Windscreens.html   or even 1/4"! (6mm) https://www.flatcatgear.com/ocelet/ocelot-windscreens

Questions

Dimension advice?
Do my calculations allowing 15-20mm gap and 3/4 wrap seem OK?
    Diameter Pot D =150mm +30-40mm gap=D 180mm -190mm, Circumference =565m-597mm,  75% wrap= 424mm-448mm  (25% gap= 141mm-150mm)
    Height 100g canister + stove + 1/2 way up pot =190mm
    Height 230g canister + stove + 1/2 way up pot =215mm
Can't find > 200mm ti foil, so would only be 30% up pot (not 50%) with 230g cannister unless anyone has suggestions of where to get 220mm or 230mm Ti Foil?
Thanks heaps
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Re: Advice: Windscreen Cannister Top Stove

Postby CraigVIC » Tue 01 Jun, 2021 7:33 pm

For trips only using a 100g canisters this might work at 190 high

https://m.aliexpress.com/item/32850631418.html
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Re: Advice: Windscreen Cannister Top Stove

Postby Caconym » Tue 01 Jun, 2021 8:36 pm

I've made a couple myself, and my preference is for titanium over aluminium simply because titanium tends to keep its shape whereas aluminium becomes a dented/creased mess. Both will cut you to the bone as soon as look at you, so I fold about 3mm of the edges of Ti foil over (using a kitchen countertop edge and steel ruler) and use a hammer to planish the creases down. If you need to make any holes, a punch is the way to go rather than trying to drill it (I mean a steel punch from Bunnings, but a hole punch for paper will probably work while also ruining the punch)

Your calculations look fine. I wouldn't sweat it on getting the screen the full 50% up the pot; mine only go about 1/4 of the way up and they work fine.

something something overheating the canister and making it explode disclaimer.
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Re: Advice: Windscreen Cannister Top Stove

Postby adventuremum » Tue 01 Jun, 2021 8:56 pm

Thanks, for $10 will try...
But does anyone know if holes (top and bottom) are effective in windscreen?
I presume I'd still need 3/4 wrap to stop cylinder overheating?
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Re: Advice: Windscreen Cannister Top Stove

Postby CraigVIC » Tue 01 Jun, 2021 9:19 pm

adventuremum wrote:Thanks, for $10 will try...
But does anyone know if holes (top and bottom) are effective in windscreen?
I presume I'd still need 3/4 wrap to stop cylinder overheating?


I used that linked screen with a canister stove for a while (a furno cheapie) and never felt it was going to blow up but the risk is there no doubt. The metal sheet is easy to fold using a ruler so you can fold over the 'v' cut to be wider if you prefer.
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Re: Advice: Windscreen Cannister Top Stove

Postby adventuremum » Tue 01 Jun, 2021 9:28 pm

Thanks CraigVic & Caconym for tips about folding & hole punch
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