My biggest fan

Discussion in 'Discussion' started by Skankin_giant, Jun 12, 2020.

  1. Skankin_giant

    Skankin_giant Well-Known Member

    Made a jump up in size from a little PM Research Stirling engine to a Repo Jost Fan. Was annoyed at myself for dithering at a £100 Robinson so jumped at this for better or worse.

    Last edited: Jun 13, 2020
    petternut likes this.
  2. Skankin_giant

    Skankin_giant Well-Known Member

    Got it running a bit more reliable today.

  3. campingstoveman

    campingstoveman Active Member

    I always find Hot Air engine powered fans a contradiction in terms, using heat to drive a cool fan is amusing :)

  4. Skankin_giant

    Skankin_giant Well-Known Member

    Well considering how much air this one shifts it's probably better at heating a room than cooling it....
    Last edited: Jun 14, 2020
  5. TangyeDan

    TangyeDan Active Member

    Is the knock due to the power piston skirt catching on the crank disc? I've got one in transit from India so following with interest. (The missus asked for an office fan for working from home! ;-) ).

  6. Skankin_giant

    Skankin_giant Well-Known Member

    Doesn't seem to be Dan, there is a bit of play in the big and small end, the conrod has a slight bend and it all wobbles about a bit, the displacer is a bit better but the big end wonders about on the crank as well... Some things are nicely made on it others are a bit meh. For me I'll have to live with it, unless I take it to someone but I expect you could sort it right out Dan.
    TBF it sounds worse than it actually is.

    Well mine pushes air out about 1" in front of the blades, so don't expect much from it......
  7. TangyeDan

    TangyeDan Active Member

    Thanks Steve. I am anticipating a project, despite it being new. Will do as an office heater for winter.

  8. Skankin_giant

    Skankin_giant Well-Known Member

    Mine had quite a bit of what I think was baked on flux in the displacer, cleaned it off and it ran quite nicely for a house and a half.

    Don't get me wrong it will probably run as is, depends how fussy you are... Why I'd like to improve mine it's running OK to keep me happy.
    I think mine suffered from too much 3 in 1 oil as there was a nice puddle in the bottom of the displacer.

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