Primus No.21, 'U' 1931.

Discussion in 'Primus No:21' started by igh371, Feb 20, 2021.

  1. igh371

    igh371 SotM Winner Subscriber

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    DSC00479.JPG

    A reasonably decent 'user' example of this relatively uncommon stove, on the right above. For scale on the left is a standard No.5 stove so it can be seen that this version of the No.21 is larger, but not as large as a No.2 despite sharing the same size burner. This 1930s/40s iteration of the No.21 was the roarer brother to the more common No.25 silent burner, and nothing at all to do with the pre-WW1 discus No.21.

    Found as an abused cast off, it had been fitted with a No.5 silent burner and abandoned because "it wouldn't pressurise". The latter problem turned out to be due simply to a blocked NRV and an incorrectly assembled pump! Obviously both very easy fixes. And now it has been treated to a correct size Liberty brand roarer burner to bring it more or less back to original specification and power output.

    DSC00478.JPG DSC00480.JPG DSC00481 (2).JPG DSC00473.JPG
    DSC00474.JPG DSC00476.JPG

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    Last edited: Feb 20, 2021
  2. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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    @igh371 Very smart Ian. That flame ring could be said to be a ‘corona’ - crown as opposed to the virus.

    John
     
  3. Tony Press

    Tony Press Australia Subscriber

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    Thanks, @igh371. :thumbup:

    Did that flame ring come with the Liberty burner? My Liberty flame ring is a boring standard version.

    Cheers

    Tony
     
  4. igh371

    igh371 SotM Winner Subscriber

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    Hi Tony, the Liberty burner and ring just were bits I already had lying around, I think the ring had originally come with an Indian-made No.2 size coil burner. It looks good on the Liberty but I don't think it makes any difference to the performance.
    Ian:thumbup:


    @Tony Press