Fire in the beer can

Fire in the beer can

In my search on the Internet for alternative cooking appliances, I happened to stumble on this little gem made from two aluminium drink cans. It appears to be doing the rounds and there are many variations out there.
I have adapted what I think is the best version, taking into consideration the raw materials available in New Zealand. I have also converted all measurements to metric. I first tried it out because I was honestly skeptical that it would work as efficiently as some claim it does. It took about 20 minutes to make and yes, it does work very, very well. I am extremely impressed with the results. Once it was alight, I managed to boil 400mls of cold water in two and a half minutes. When you see the price of camping stoves in the shops, you realise what a huge saving this could be. You need two empty aluminium cans. Either soft drink or beer cans will do. The narrow ones that some energy drinks come in are a tad on the small side for this project. Scribe a line completely around each can 30 mm up from the base. Cut along this line with an ordinary pair of scissors. The idea is that the bottom section of one can forms the base of your stove. From the other can use the bottom section (because the top has a hole in it) and simply push it over the first base, forming a container. The base can needs to be crimped slightly to enable the top can to slide snugly over. I found that the tips of a pair of side cutters did this crimping nicely but make sure you do not actually cut the metal. On the base of one can, mark 16 equally spaced points with a pencil around the rim. Gently press the scriber point into the metal at each of these marks to make a locating point for your hole-forming “tool”.

Scribe the bottom of the can around 30mm up. A matchbox comes in handy

The finished "stove" — The finished “stove”

Using a darning needle in a pin chuck
or suitable holder, carefully make 16
holes. These holes want to be about
0.5mm in diameter, but consistency
is more important than actual dimensions.
In the recessed surface of
this can, drill a 6mm hole slightly off
centre. This will form the filling hole.
It is off-centre to allow for a small
amount of fuel to remain in the central
depression for initial lighting. Press the drilled top unit over the base unit and squeeze them together. This can be a bit tricky but it is worth spending time to get it right. I placed them in a wood vice and wound it in gently to get things even. Take care not to go too far.
To contain the stove safely it is advisable to place it in another suitable container. A small tuna can or similar is ideal.
Fill the stove with methylated spirits until it is about three-quarters full. You will have to judge this by weight until you get used to it. The stove will hold around 60mls of meths. Place a ten-cent coin over the filling hole then pour a small amount of fuel in the top depression.
Light the meths and wait for the heat from the burning fuel to pressurise the meths inside the stove. When it does, the jets of flame will start to come out of the small holes made with the needle.
Support a cooking pot about 50 mm above the top of the stove by making a stable frame for it such as a trivet. I formed 5mm mild steel rods into U shapes hinged by 15m copper tubing. I held the legs in a vice to crimp the copper on. Bricks would do as a pot support and a windbreak feature would be an ingenious addition. Now sit back and wait until it boils. It really is that simple and truly one of the most efficient heating devices I have ever seen.
This is a great little project for a wet winter day and one you could do with the kids, though remember you are dealing with fire and it is NOT a toy. Give it a whirl…you’ll enjoy it. It is also a great addition to the household emergency kit that Civil Defence is always urging us to have. Last but not least, there is the warm glow you will acquire knowing that you are both recycling cans AND saving the planet from yet another disposable butane cylinder.

Valve radios: Retro Radio magic

16 April 2025

The family gathering around the wireless to listen to the Friday evening programme may be a thing of the distant past but the beauty of those old valve-driven radios lives on in the dedicated work of Retro Radios.
Based in Dannevirke, Alister Ramsay works from an assortment of sheds, a garage and a container lovingly restoring old valve radios and radiograms. In a workshop redolent of the glory days of the 1940s to the 1960s, with nostalgic posters for Life magazine and a smattering of old cameras – another hobby is collecting old cameras – Alister works to a background of smooth jazz issuing from a variety of beautifully restored valve radios producing warm-toned music to set the mood.

Video of From Rust to rrroarrr – part three

14 April 2025

In my first two articles about the rebuild of a bitser 1952-ish AJS 500 motorcycle, I outlined how I welded a broken cast-iron cooling fin on the motor, checked the magneto ignition and got the head repaired.
I also described what I had learnt about nickel plating (using surplus nickel welding rods and then nickel tape) so that I could make a relatively cheap substitution for chromium, eg on pushrod cover tubes and bolt heads.
Nickel plating was also used to build up a worn kick-starter shaft as a part approach to stopping the kick-start from jamming; I also ground back a couple of teeth on the starter quadrant gear.
My bitser’s gearbox
The gearbox is a Burman CP type, used on many English bikes, with a code G45 L47 stamped on it.
The L in the code refers to the month of assembly, so November.
47 is the year: 1947. So this would have gone into a bike probably in 1948. (My claim to be rebuilding a 1952 AJS looks shakier.)

My shed: Going bush in town

10 April 2025

Many guys like to retreat to a space they have created and feel comfortable in. For some, it’s a shed to tinker in and build things, for others it’s some sort of man cave where they can socialise with their mates.
Gary Were of Stratford, in Taranaki, has gone a step further. The 71-year-old year semi-retired builder and deer hunter has re-created a replica of his favourite bush hut under his urban house.
For 30 years Gary has been deer hunting in the Urewera ranges in the centre of the North Island. It’s an isolated place, where the boys get flown in by Heliseka Helicopter and spend a week each year hunting sika and sometimes red deer.

Fire in the beer can