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Duo-Burn 2-pinter, fixed leg, lipstick burner

Discussion in 'Falk, Stadelmann & Co Ltd' started by presscall, Jun 15, 2011.

  1. presscall

    presscall United Kingdom Subscriber

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    Brian Miller has this model pinned as a cheaply-produced, underpowered and somewhat ugly compromise in a post-war Britain restoring it's economy by exporting all the good stuff

    kaw550red's Duo-Burn


    Compelling arguments, but let's take a closer look at the stove. Looks ok from some angles, with a rather handsome silent burner converter cap in brass, not branded Primus (or Duo-Burn, but I'll take a look at that later)

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    Brian's attention focused on the burner, which is certainly something of an oddity, as a half-pint-stove-sized lipstick burner with a 100-sized burner bell and an adaptor to screw it onto the 2-pint tank's riser tube

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    Top's the Duo-Burn burner components, middle's from a Primus 96 (with BernieDawg silent burner converter cap), bottom's from my pre-1911 Primus 100 with a modern silent burner converter cap

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    Putting those burners and components into context with their stove tanks

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    Brian suggested the Duo-Burn's vapouriser tube was RM/Thermidor produced. Quite possibly, but handling the two together, there are detailed differences in tube contours - other than the obvious one of the fitting arrangement

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    The Duo-Burn comes with a substantial roll of gauze installed

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    Ok, back to the aesthetics of that burner and its performance on the stove.

    It certainly looks somewhat inadequate ...

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    ... but starts to improve when the rest of the components are added

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    I said earlier that I'd take a closer look at that silent burner converter cap (on the left, Primus equivalent on the right)

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    Detailed differences, not least in diameter and height, suggest the brass one's not of Primus make

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    In terms of performance, it's no worse than that of a Primus 100, which admittedly is itself not up there with the more powerful stoves, having a 0.23 diameter jet orifice (same as that of a 96 lipstick burner). Got going pretty well though

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    A few more pics to follow shortly ...

    John
     
    Last edited by a moderator: Jul 1, 2015
  2. presscall

    presscall United Kingdom Subscriber

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    Of course, with that 100-sized burner bell I just had to try out the Primus's roarer burner plate.

    The Duo-Burn certainly gave it a good workout

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    Back to the silent burner converter cap, working well on a 'tea test'

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    Other possibilities. Duo-Burn burner bell and converter cap and roarer plate on a half-pint Thermidor

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    Not a good idea. The radiant and conducted heat from that extra mass of metal got the tank uncomfortably hot.


    Those Duo-Burn aesthetics again. That 'step' between the scrawny vapouriser tube and the riser tube from the tank is what robs its looks. How about a Primus 107-style windshield to disguise it?

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    John
     
    Last edited by a moderator: Jun 27, 2015
  3. Dutchmike Netherlands

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    That brass de-luxe windshield sure restores some balance estheticly, John! I sniff a demand for said shield....and not only from Primus 57 and 107/110 owners!
    Regards, Mike
     

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