Monthly Archives: January 2012

Gear Review: Butane Canister Refill Tool

Update 16/10/17: Wow, 4 years later and this is still the most popular page on my site! The Camping In Taiwan store has changed some URLs, so I updated them accordingly.

Update 13/05/13: It has been noted by someone that the company’s policy of shipping their adaptors in simple sealed, unpadded envelopes can cause problems – the unpadded envelope may rupture, leading to package loss. I suggest voicing any concerns with shipping to the owner.

An $8 piece of equipment which I highly recommend to any canister stove or lantern user is this butane canister refill tool. I managed to find it from the Camping In Taiwan website/webstore, here (scroll down).*

The bayonet-to-threaded refill adapter
With butane, there are two standards: the wide and squat EN417 threaded style canisters used in camping applications, and the thin and tall bayonet-style butane canisters often used in home applications. This above tool allows anyone to refill their isobutane/butane blend EN417-threaded canisters with the bayonet type butane cartridges. The benefit of using these bayonet cans to source fuel is obvious: they are cheap, cheap, cheap! But, because they have a bayonet fuel mount, then this adapter is needed. The adapter converts the large nozzle on these butane cartridges into a smaller nozzle – just large enough to fit into an EN417 valve and refill your favourite isobutane cartridge.
If you are partial to using the small isobutane canisters (like me – I always use the 113g/4oz. cans), so that you aren’t carrying the heavy and larger 227 or 450g cans, then using this refilling adapter will save you even more. Lets do some math:
  • MSR Isobutane (113g): $4.90
  • Primus Isobutane (450g): $10.00
  • North 49-branded Bayonet Canister (227g) : $2.99
  • Generic Bayonet Canister (227g): $1 to $1.50ea (look for these in 4-packs @ your nearest Asian food market)
These work out to (g per $):
  • MSR: 23.1 g/$
  • Primus: 45.0 g/$
  • North 49: 75.9 g/$
  • Generic: 227.0 to 151.3 g/$

The substantial savings become obvious when comparing like that. Note also how much more you get per dollar when using the larger isobutane canisters compared to the smaller ones. Asian markets carry lots of the bayonet cans at dirt cheap prices, since curved woks won’t work on regular electric stove elements, and the butane home ranges are often used instead. But seeing as I don’t live near any Asian food markets, I recently have relied on Canadian Tire’s North 49-branded bayonet cans as fuel (and sadly, have been paying the mark-up on  price).

The break-even amount I have found is 2 full refills, using my MSR 113g and the North 49 refills. The adapter has already paid for itself a few times over.

Its just a small piece of machined aluminum and two rubber seals. Weight: 3g.
Here’s how you use it. You’ll need a kitchen scale, the adapter(duh), a threaded isobutane canister, a butane refill, access to a freezer and a marker.
1. Weight a full EN417 isobutane cartridge. If you don’t have a full can, you can often find the full weights online. I have recorded this weight on the can’s bottom, for future reference:
232g —> the mass of the butane gas (113g) + canister itself ( 119g)
2. After a few weeks, once your can has been mostly used up, weight it again:
My refill apparatus, with mostly empty MSR cartridge ready to be refilled. In my case, a fully empty MSR canister would weigh ~119g
3. Now, put the empty can into the freezer, and let it chill. This will help create a pressure difference, and drive the butane into the canister far more quickly.
4. Remove from freezer, and place the adapter into the valve hole.
5. Take the bayonet can and place it into the orifice in the adapter. Press down firmly. If you don’t it may leak a bit of butane gas (you’ll smell it). Hold it down for a few seconds.
The connector should look like this when ready to go to the next step.
6. Place the refilled can onto the scale, less the adapter. Aim for a similar weight to that of the full canister. Try not to go over. Under filling by any amount is fine, and overfilling by a few grams shouldn’t matter either.
Refilled MSR 113 Cartridge. In reality, the full weight was to be 232g – it is really easy to over shoot the target.

As in the above picture, I’ve managed to over fill. By adding these extra 11 grams, I have increase the total fuel by ~10%. Since this refilled can is just pure butane now, instead of the usual isobutane/propane mix, the cold-weather performance should be noticeably less exciting. Butane boils at 0C @ sea level, and so this technique will really only work for spring/summer/fall use. Isobutane boils at -12C, and Propane boils at -42C, and so these fuels should work much better in the cold.

However, this allows us to exploit the higher boiling point – we *can* over fill by some degree with impunity. This can occur without the canister bursting because pure butane won’t make as much vapour pressure at room temperature as isobutane/propane will. Slightly overfilling is a good way to cut down weight if you should need more fuel – more fuel for less space and per packaging weight. A way to do this with minimal risk is to let both cans reach room temp, then try at filling a little more. The pressures should equalize to a safe level, and you should still get a little extra fuel added. BUT if something does go wrong, I don’t take any responsibility.

* This is not an advertisement for Camping in Taiwan, nor have I had any compensation for this review.

New 29er Monstercross from Surly

Quite a few years ago, Surly introduced the then-revolutionary Karate Monkey frameset (they claim it was one of the first commercially-produced 29er frames). Now, Surly has taken the concept behind their utility bike, the Troll, and bumped it up from 26in wheels to 29in:

The new Surly Ogre.  Credit: Surly Bikes
Surly says that their new frame has geometry similar to the Karate Monkey (which, by following their numbers, it does), but with all the function of the Troll. What does this mean? Well, it has:
– Front and rear Canti/Linear brake mounts
– Disk brake tabs
– Double dropout eyelets, both front and back (so you can mount fenders and racks all round!)
– Specifically design for fender clearance (yay!)
– Fits up to 29 x 2.5″ tires, more that one should ever reasonably need
– Full-housing cable mounts 
– Surly-compatible trailer mount
The bike seems well-equipped to be an all-rounder, off-road (or road) tourer, or nice singletrack companion. 
The only quibble I have with this frame is that there is no down tube cable stop, or place to bolt one on (as in the Origin 8 CX700). Be prepared to have to DIY a cable stop if you want to use drop bars. I like the offset seat tube, which will definitely aid in fender-izing your bike. 
So far, the bike frames aren’t yet in stock or in stores, so there isn’t much to go buy in terms of user reviews. Twentynineinches.com reports that the Ogre frame+fork combo will likely be offered at a sub $500 price, similar to the Karate Monkey ($475 MSRP). However, don’t forget the price on novelty! I suspect that the price will be slightly higher than the Karate Monkey, due to this model filling in a niche market (with the Salsa Fargo, Orgin8 CX700, Singular Peregrine and little else competing with it). 

Trangia Lighting Procedure

A brief follow-up: using my homemade soup-can pot stand, the lighting instructions:

1. The stove and stand are set out. In cold weather, the stove is
set on a plastic soft drink lid to insulate against the ground. 

2. The lid is remove, and the burner is lit. The pot stand is then
carefully placed over the burner. 

3. Wait approximately 30 seconds to let the burner ‘bloom’; the
 flame must come out of the burner’s holes. Often, an audible ‘pop’
noise will signal that the flame has bloomed, and the stove is warmed  up.

4. Now, the stove is ready to cook food! 

5. Unlike ready-made cooksets, this DIY pot stand must be removed
with a pot gripper before the stove can be extinguished. Once the hot
pot stand is removed, the Trangia’s lid is dropped
over the flame to extinguish it. 

Gear Review: Trangia Alcohol Stoves

My first post of the new year will deal with my little Trangia stove I’ve picked up a while ago. Now that I’ve been able to use it on a few day-hikes during the Christmas break, I can confidently review it. The first, and most obvious point, is that this is an alcohol stove; these stoves can burn the commonly found methanol, ethanol and even isopropyl rubbing alcohol. This stove cannot burn anything properly but alcohol – I tried white gasoline and ended up with a sooty, fireball-prone mess – and this could leave much to be desired in a third-world setting where kerosene/autogas (petrol) is all that may be found. But, here in Canada along with the US, most of South America, and Europe, methanol is easily found in nearly every hardware shop. Often it is labelled as ‘methyl hydrate’, and so people overlook it, but 4L can be be had for $10.

Trangia burner w/ homemade soup can pot stand. The port is
wide enough to allow use of the simmer ring.

It is important that I say that the Trangia I review was purely the stove unit and not the cookset. But, here’s what I had to say about the stove in my review for MEC (Mountain Equipment Co-Op):

Great overall little burner – stows away well, is relatively lightweight and has a high heat output for an alcohol stove. What I love about the Trangias is their ability to store unused fuel inside them – this helps to reduce wastage, and on a day-hike, I don’t have to bring a separate fuel bottle. I just end up topping-off the burner and using the fuel left inside.

I sprung for this burner because I was not willing to invest 60+ dollars on a full Trangia kit; instead I hacked apart a soup can and used that as a stand. Don’t hesitate to use this ‘replacement’ in stand-alone configuration; it still boils quickly and is quite wind proof *if* one uses a wind screen.

Not the fastest boil times I’ll admit ( 7:10 for 2 cups @ room temp), but who’s counting minutes on the trail? It also doesn’t seem to have any problems in winter (unlike canister stoves), and my testing had 2 cups of water boil in 8:30 @ -10C. Comparable to or better than other alky stoves, IMO.

Bottom Line: One of the best and well-rounded alcohol stoves out there.

True to my MEC review, the stove I use isn’t part of a Trangia Cookset. I have a real appreciation of the simpleness of the stove, which makes it near indestructible, albeit at the cost of a few BTUs of heat output. Pressurized stoves of all kinds cannot beat the venerable little Trangia when it comes to durability and the interval between maintenance periods (there IS no maintenance!). For the rough n’ tumble hiker who needs to boil a few cups water for a quick meal or even to frying an egg over-easy, it would be a good choice. For groups above 3 people, you will want to look elsewhere. Here, its benefits are complicated by the low heat output, limited fuel capacity, and large fuel consumption. It *will* take a good 30 minutes or so to bring 3 litres to boil in good conditions, and the low energy density of alcohol fuels means sometimes 2-3 times the volume of petroleum fuel needs to be burnt to cook equivalent meals. 

The results of a boil test. 8:16 for 500mL to a rolling boil @ 0 Celcius
with light wind.

 The benefits vs. an isobutane (canister) stove are obvious – far cheaper fuel costs, cheaper investment in the stove, and they work well even in winter conditions. Also, depending on the configuration of pot stand/wind screen, the alcohol stoves can outclass a canister stove in being lightweight. 


I really do like the Trangia stove units – which can be bought for $12 – and the complete cooksets, but I firmly believe that because of their niche status and lack of other competition (Sigg has not been manufacturing its version for a while), Trangia over-inflates the prices of their cooksets.  Unless I found a 2-person cookset going for $30 or under, they are out of my league, and I feel them overpriced for the quality of the product. I own a Sigg Inoxal mini-cookset, purchased for $15 3 years ago. These pots are beautifully crafted, and well designed. They feature a black-painted aluminum exterior for strength and heat dispersion, but have an 18/8 stainless interior for cooking. This makes them lightweight, but sturdy, scrubbable with rocks + sand, and usable without fears of scratching the cook surface – or getting Alzheimers. Why then does it cost me $30 to buy a trangia mini cookset, which is just plain aluminum? The quality of the pressings isn’t up to Sigg’s snuff either. 

 Packed-up: Homebrew cookset. Sigg Inoxal cookset at right,
Trangia stove, DIY tin-can potstand, 75ml fuel bottle, and MSR windscreen at left. 
Unpacked: Potstand uncovered to show MSR windscreen and  fuel bottle.
The Inoxal cookset’s lid doubles as a frypan. Inside: 2 Guyot squishy bowls,
a compact lighter, folding knife, salt+pepper shaker, and DIY SS spork+knife.

For those minded like I am, purchase only the Trangia burner to use with another cookset. My homemade setup consists of the brass Trangia burner filled 3/4 with alcohol (160g), a steel soup can converted to a potstand (55g), a plastic softdrink lid to insulate the burner in winter (2g), and an MSR aluminum windscreen (45g). Very lightweight, and a good deal more windproof than a stock Trangia mini cookset would be. 


Stay tuned for more bike and gear reviews!