Versatile Optimus 91 (Purple Flame)

Discussion in 'Optimus No:91' started by presscall, Feb 1, 2014.

  1. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

    Offline
    Joined:
    Aug 25, 2009
    Messages:
    9,871
    Doc Mark's recent and understandable elation at tracking down the elusive (rare that is) Optimus Loke "Finally an Optimus Loke 85" prompted me to see if I could get a bit more versatility out of my Optimus Purple Flame meths stove.

    As it stands, the Optimus 91 won't simmer on its stock burner and a kettle can't be stowed in it or set to boil on it. Putting those niggles right and adding an isobutane burner and a regulated silent paraffin burner options were on the fettling agenda.

    By incorporating a couple of earlier 'Frankenstove' projects (notably the I got bored stove) I managed to achieve what I wanted

    1391268193-1.JPG


    First job was making up these pot supports from brass tubing with a screw silbrazed into each end to enable them to be threaded through windshield holes but with the screw heads acting as stops to prevent them slipping out. They stow away too

    1391268223-3.JPG

    1391268231-4.JPG

    1391268240-5.JPG


    Kettle stows away too

    1391268250-6.JPG

    1391268216-2.JPG


    Sits out of the wind in use

    1391268260-7.JPG


    Those same pot rests lift raise a pot sufficiently to offer a simmering option on the stock burner

    1391268279-8.JPG 1391268287-9.JPG


    Isobutane from a Trangia gas burner equipped with a CEJN fitting - something I'd already put together for another project and saves widening the access hole for the usual Primus valve control

    1391268297-10.JPG 1391268306-11.JPG


    The 'bored' stove

    1391268318-12.JPG f


    Happily, the Optimus windshield was a fit on the adapted Tilley pot rest frame

    1391268329-13.JPG


    I didn't fancy the heat from the burner melting the bottom rim of the windshield however ...

    1391268343-14.JPG


    ... so I fabricated this ring out of galvanised sheet steel

    1391268356-15.JPG


    It shields the aluminium from the flame and acts as a useful windshield for the burner too - supplemented by a folding windshield for the priming phase at least

    1391268368-16.JPG

    1391268382-17.JPG

    1391268398-18.JPG

    1391268423-20.JPG

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

    Offline
    Joined:
    Jan 4, 2013
    Messages:
    313
    I admire your creativity and workmanship. I don't have those skills myself. I enjoy the photos of your work. Thanks for sharing.
    Gene
     
  3. Stoveuser

    Offline
    Joined:
    Jan 13, 2010
    Messages:
    639
    Once more a post with excellent pics. Your skills combined with what must be a good load of imagination are inspiring.
    Thanks for sharing.

    Best regards
    Stoveuser
     
  4. Chef BC

    Offline
    Joined:
    Oct 14, 2010
    Messages:
    1,631
    John, That is a superb piece (pieces) of work. Imagine what one could do with a micro sized nuclear reactor :shock: :doh:
    I recall there is a member here who has stated to have "Fixed a bicycle with an Optimus 00 stove" or visa-versa(?)
    Chef Harold
     
  5. Doc Mark

    Doc Mark Subscriber

    Offline
    Joined:
    Dec 12, 2004
    Messages:
    17,741
    Hello, John,

    Thanks for the nod, which gave me a big grin!! I'm also tickled by your very imaginative creations, which, as always, work like a champ!! Great solutions to the problems you mentioned, and because it's a creative solution, your enjoyment of this setup will probably be enhanced greatly! If I had done the same, I'd be one Happy Chappy!! Thanks for sharing your skills, both for fettling, and photography, with us all, and HUZZAH to you, my friend!! Take care, and God Bless!

    Every Good Wish,
    Mark
     
  6. SMolson

    SMolson Subscriber

    Offline
    Joined:
    Feb 24, 2009
    Messages:
    1,048
    Beautiful work, love the draughtshield you have setup there too. That's a lot power/heat/energy funneling up.

    'I got bored stove' - lol, great name and well done.
     
  7. shagratork

    shagratork United Kingdom Moderator, R.I.P. Subscriber

    Offline
    Joined:
    Aug 9, 2005
    Messages:
    9,641
    Location:
    Durham, N.E. England
    Hi John

    You never cease to amaze me! :lol:

    Great stuff!
     
  8. NP4-8-4

    NP4-8-4 Subscriber

    Offline
    Joined:
    Apr 21, 2012
    Messages:
    164
    Oh my. I had thought to log into CCS and report my excitement over my new to me Phoebus 625 which, with a replacement washer kit from the Fettle Box, roared to life this afternoon. But then I viewed Presscall's amazing work depicted here and thought again. Wow. Very nice project. Thanks for sharing. PWW.
     
  9. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

    Offline
    Joined:
    Aug 25, 2009
    Messages:
    9,871
    Don't play down your achievement PWW. Nature of CCS is that we're all pleased as punch to have sight of each other's projects.

    Phoebus is a cracking good stove.

    John