model engine fuel?

[neil_1821]

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!

 

[crankshafter]

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

 

[Brian Rupnow]

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.

 

[neil_1821]

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

 

[Charles Lamont]

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.

 

[coulsea]

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

 

[tornitore45]

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?