RM Picnic. Wickless Oil Stove.

Discussion in 'RM MFG & Engineering Co Ltd' started by kerophile, Jul 22, 2009.

  1. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Hi here are some photos of a recent acquisition; A rather nice example of the RM Picnic stove; from the 1950s I would estimate.
    The stove still has its original lacquer.

    This is a one-pint, classic brass-tank paraffin stove, with a roarer burner, manufactured by the RM Mnf. and Engineering Co. Ltd. of Birmingham:

    1248283108-RM-Picnic.-St.299-1.jpg 1248283149-RM-Picnic.-St.299-2.jpg 1248283184-RM-Picnic.-St.299-3.jpg 1248283219-RM-Picnic.-St.299-4.jpg 1248283242-RM-Picnic.-St.299-5.jpg 1248283272-RM-Picnic.-St.299-6.jpg 1248283326-RM-Picnic.-St.299-7.jpg 1248283370-RM-Picnic.-St.299-8.jpg 1248283406-RM-Picnic.-St.299-9.jpg 1248283458-RM-Picnic.-St.299-10.jpg 1248283481-RM-Picnic.-St.299-11.jpg

    The original instructions, which came with the stove, are over-stamped:
    "Important, Use only "O" size prickers. Oversize prickers will damage the nipple"

    The jet aperture diameter is only 0.23mm, so the stove has been effectively de-rated from the "normal" 0.32mm jet aperture. I believe this was done at the time of the "Suez Crisis" (1956) as a proposed fuel economy measure.

    The stove still performs well, as can be seen from the flame photos.

    I will post the instructions later.

    Best Regards,
    Kerophile.
     
    Last edited by a moderator: Jun 27, 2015
  2. Big Si

    Big Si Subscriber

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    George mate another cracking fettle 8) 8) . I've got one of theses but not in such good nick. I'll have to fire it up and have a cup of tea when I get home from work.

    Si
     
  3. sefaudi

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    I haven't got any stove in RM brand. I find them a little strange. Maybe this is becuse, angle of pump tube attachemnt is different. And its legs seem to be thicker than Primus 96, Burmos 21 etc, 1 pint stoves. Is it so?
     
  4. alex_holden

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    IIRC the pot supports are quite thick because they are made from something lighter than steel; maybe an aluminium alloy. It's a pretty nice little stove. :)
     
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  5. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Hi Sefa, the legs of the RM stove are the same diameter as those of other 1-pint stove, such as Pr.210, Op.00 or Radius No.21.
    The Pr.96 is a smaller stove with a 0.5pint tank, and thinner legs.
    The later Thermidor, Veritas and RM 1-pint stoves are essentially identical, and may have been made in the same factory. All these stoves use aluminium-alloy legs, reather than steel, and these work very well, being light and very corrosion-resistant.

    You will know, Sefa, that the legs on your Burmos 1-pint stove are also made from Aluminium alloy.

    Best Regards,
    George.
     
  6. mbechtel

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    Beautiful stove George. I particuliarly like the design of the windscreen.
     
  7. sefaudi

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    Oh yes I am well aware of that. Thanks George for reminding me.
     
    Last edited by a moderator: Jul 2, 2015
  8. Cajuncook1

    Cajuncook1 United States Subscriber

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    George, I know this an old thread, but was seeking some advice.

    I recently purchased an RM picnic stove. It seems to be 1 pint stove. I have not fettled it yet.

    I notice you stated that the jet was 0.23mm. If in the future I have issues with the jet and need to replace it, would a jet for a Primus 210 be an acceptable replacement? To clarify, is the jet orifice for the Primus 210 0.32mm?

    Appreciate your time and input.

    David

    aka Cajuncook1
     
  9. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Hi @Cajuncook1 Your RM picnic stove should operate well with the jet used in a Primus No. 210 stove. ( Jet aperture 0.32mm diam.)

    As I explained in the original post the under-sized jet was only used as a short-term measure during the Suez crisis in 1956. It was a stupid tactic as it takes a certain amount of fuel to heat or cook an item, or boil a kettle. If you are using an undersize jet you take longer to get that done so there is no net fuel saving.

    Enjoy you stove and share some pictures with us.

    Best Regards,
    George.
     
  10. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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    Unless it enhanced sales to those who’d not worked out the false economy. Dishonest tactic if so.
     
  11. Cajuncook1

    Cajuncook1 United States Subscriber

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    George, thanks for the quick reply. When, I have a chance to tackle that rascal and get it going, will gladly post some pics

    Cheers,
    David
     
  12. Iain MacMullen United States

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    Does anyone have a line on the wind shield it’s the only component I do not have.