Quote:
Originally posted by rob love
John
My understanding was that the cookers changed very little over the years. Here is a no2 cooker on ebay now: http://cgi.ebay.ca/Military-Army-No2...QQcmdZViewItem
I have a no2mk2, and it fits nice and snug in the over coocker tray located above the gas tank.
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They haven't changed much indeed, this one on epay is a No.2 Mk.2 Modified and is both post war and expensive, they're seen here at the shows for £10 typically.
The No.2 Mk.2 is the same as wartime issue (they are never dated) and can immediately be identified by a smaller burner that is a simple cone with a loose flame spreader disc retained by radial "claws" at the top. Also it has the valve directly under the fuel tank whereas the later version has it under the burner and uses the tube spanner jet key as the control extension.
The metal mounting box for both is dimensionally identical, the modified version just has an extra hole on the right side for the valve key.
I have several of each and use them for real, the modified type are a real pain to get going properly and will make pulses of poorly vapourised, sooty, yellow flame for many minutes although when finally going well have a fierce burner. They control well having the valve below the burner and it includes an integral jet pricker.
The No.2 Mk.2 is a doddle to get going and has a roaring burner, it doesn't control well as the valve is at the far end of the fuel feed pipe and when shut off it is essential to blow out the final small yellow flame before it goes out or the jet will be blocked with carbon.
With either they eventually become a blackened, sooty mess and some care must be taken with pressurised petrol; never attempt to extinguish by releasing the tank pressure. . . . . . . . . . . .always use the valve!
Incidentally my measured performance of these cookers, using the same alloy kettle and equal start temperatures of 1 litre of water is:
Domestic gas 65mm burner...............7mins
Cooker No.2 ....................................5mins
Cooker No.2 modified........................6min 30secs
Cooker No.13 Petrol..........................8min 30secs
Diesel............................................ ..6 min 32 secs
Cooker No.13 is a much later device made entirely of stainless and having a small multi-fuel burner, it shows how much more energy there is in diesel oil though.
R.