model engine fuel?

Discussion in 'General Engine Discussion' started by neil_1821, Sep 16, 2017.

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  1. Sep 16, 2017 #1

    neil_1821

    neil_1821

    neil_1821

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    I'm almost to the point of completing my V twin hoglet build, i'm just finishing off the valve lifters and then it's a mtter of wiring up and testing!

    I'm wondering what fuel people use, as it's a dry running engine?

    Do you use the nitro fuels or do you mix petrol and oil......? I'm sure i've read something about that somewhere but I cannot find it anywhere now i actually need the information!
     
  2. Sep 16, 2017 #2

    crankshafter

    crankshafter

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    Hello neil.
    Are you using Viton o-rings on the pistons? If so use plain gas with a couple of drops of oil mixed in. not to much or it will smooooke bad.
    I have buildt the Hoglet and the vitonrings hold up quite good. its important that the cyl.liners have a mirror-like finish.

    CS
     
  3. Sep 16, 2017 #3

    Brian Rupnow

    Brian Rupnow

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    Neil---You can do as Crankshafter says, and use automotive gasoline, but the exhaust stinks big time. A lot of us use Coleman fuel (Naptha gas) as the exhaust from it has very little odour . If you have a Viton ring on the cylinder, use a 50:1 gas/oil mixture.
     
  4. Sep 17, 2017 #4

    neil_1821

    neil_1821

    neil_1821

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    Thanks for the replies.

    Yeah i've use the Viton O rings on the pistons. I've had a look at the Colemans fuel and it's pretty expensive over here, roughly £8 a litre so i may try it on the petrol and mix in a few drops of oil, I can't imagine it'll smell any worse than a 2 stroke and I quite like the smell of those!

    Hopefully post a video in the completed projects section when it's finished and running :)
     
  5. Sep 18, 2017 #5

    Charles Lamont

    Charles Lamont

    Charles Lamont

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    Aspen alkylate petrol may be cheaper, but still not cheap. Google it for your nearest supplier (they are a bit thin on the ground) and a description of the claimed advantages.
     
  6. Sep 25, 2017 #6

    coulsea

    coulsea

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    I Australia we have Shellite which is the same as coleman fuel but cheaper because it is not associated with a brand name. It was traditionally used by plumbers in blowtorches and soldering irons. you can get it at the hardware in the same type of bottle as metho, turps etc
     
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  7. Jul 13, 2018 at 3:27 PM #7

    tornitore45

    tornitore45

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    Crankshafter, I am also building the Hoglet and have questions about the sizing of the piston groove.
    Can you share your dimensions?
    I have a feeling, just a hunch not supported by any experience that dimensioning the groove following the standard formulas given by the manufacturer will result in too high a friction. Standard design call for 20% radial compression of the O-ring crosssection but I think is too much.

    Any real data from working engines out there?
     

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