The bottom line, if there is one, seems to be that putting empty canisters in with other metal for recycling, isn't advised. The canisters are highly pressurised and need to be safely punctured in some way and any remaining fuel removed before they can be recycled. I even read on a US forum someone advocating puncturing the canister with a knife, then smashing it flat with a rock. I won't be getting up to any of that malarkey this summer.
My gas stove is a Primus Eta Paclite. It's fast, fuel-efficient and environmentally friendly as gas stoves go, and essential for cold winter conditions. For the Tay catchment walk, though, I decided it was time to branch out and try something different: more versatile, lightweight, environmentally friendly and fun. Gas is just a bit too easy! No click'n'go with using other fuels. A bit of skill and preparation is required. Burning wood in particular is an art, a deeply satisfying one. It's primal, caveman stuff, even if you use a fancy stove to do it.
So - recently I bought a three-fuel ultralight stove I've been reading lots of positive things about: the Trail Designs Sidewinder ti-tri system. Ultralight Outdoor Gear were offering a package including the basic meths stove and solid fuel burner kit plus inferno insert and titanium floor for wood-burning. The inferno insert is an inverted cone that sits inside the main cone and is meant to increase the efficiency and heat of the wood burn. I also got a 900ml Evernew titanium pot.
I expect there to be a few opportunities for wood-burning on the Tay catchment walk so for this first test I was especially keen to try out the wood-fuel set-up. After endless days of wet and windy weather, today was sunny and calm - perfect for a first fair-weather test out in the back yard.
Lit with a firesteel, using twigs gathered from the street and homemade firelighters of cotton wool smeared in Vaseline... I hunched over my handiwork feeling very pleased with myself. When the fire gets going, it burns fast, hot and fierce. I boiled a pan of water in around 5 or 6 minutes.
There are plenty of these sort of pictures already on better blogs than this, but here are a couple more:
The hype about the efficiency of the inferno set-up is well-founded. When I let the fire burn out, it quickly reduced to no more than a small pile of white ash. And it does burn out fast. You need to keep a constant eye on it and have a good supply of twigs on hand to feed in regularly.
Overall I was delighted with this test. I think the Sidewinder ti-tri and I are going to be good friends - this summer and many summers to come. I'm liberated from the easy tyranny of the gas canister.
Little to pick real fault with, but a few reflections:
- Wood burning produces a lot of soot, even just one brief burn as I did today. Cleaning the pot base regularly will be necessary to prevent an efficiency-lowering build-up.
- There are a lot of little bits and pieces with this system for adapting it to three different types of fuel. In a wild camping scenario especially you need to keep this stuff organised to avoid losing bits of it.
- Again, it's good to be organised with tinder and lighting if you want to use the wood-burning mode regularly. I've turned a small watertight tupperware-type container into a tinderbox containing my firesteel, back-up matches, solid fuel cubes, some purchased dry tinder dust (again as a back-up if no dry tinder is available), and a ziploc bag with homemade firelighters: cotton wool and Vaseline.
- The full kit doesn't quite fit into the pot as suggested. Well it does, but you can't quite get the lid closed - in my book that means 'it doesn't fit'. A caddy of some sort is a necessity for this reason, and also if you want to keep most of the bits that will smell of meths and smoke away from the inside of the pot, which I plan to eat out of as well. I've made a temporary caddy from a plastic bottle. The only smoky bit that really has to go in the pot is the fire grate, a circular piece of mesh that can't be rolled or folded. This does have a tough Tyvek paper sleeve for storage though.
- The meths stove, made from an old soft drink can, feels delicate and could be easily dented or crushed. Keeping it in the plastic ziploc tub provided is probably advisable on a backpacking trip, and means it can go in the pot without making it smell of meths.
- The wood fire seems very safe and well-enclosed. However - and this is maybe ultra-cautious me - I reckon I would still take good stock of where and when I use the stove as a wood burner. Obviously a tinder-dry forest or heather moor in a heat wave might not be best. Clearing the ground around the stove of flammable stuff like dry leaves is probably a good idea. The wood-burning floor will prevent scorch-marks on the ground, good from a Leave No Trace perspective, but I would go belt and braces and also put the stove on a flat rock or slate if possible. Like I say, maybe me being cautious. During my test I didn't see any sparks escaping the stove.
Testing out the Sidewinder's wood-burning capacity was huge fun as well. I haven't messed about with fires since I was a teenager (all legal of course!). If London succumbs to Biblical weather chaos, at least we'll still be able to make a cuppa.