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Fuel for IC engines

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Rustkolector:
John,
Fuel/oil mixtures should work in Jan's vapor carb. According to "Raoults Law" of partial vapor pressures, heavier hydrocarbons such as oils, will vaporize in near the same proportions as contained in the liquid fuel mixture. I think you will find that Jan Ridder discovered this for himself and wrote about it relative to his most recent 2 stroke engine. I have tried the vapor carb and it works very well with camp fuel. I found that it is best suited for short demo runs. It gets pretty cold from the vaporization process, and prefers to warm up a little between runs. I like to run most of my engines for rather long periods so it isn't ideal for those engines. 

Don't forget propane as a model engine fuel. I have had very good luck with camp fuel, but after trying propane it has become my preferred 4 stroke fuel. It cannot, however, but used if the engine requires a fuel/oil mix. With propane, the engine exhaust is almost odorless, engines start very easily (no choking), will never flood the engine, and exceptionally clean combustion.

Jeff

John-Som:
Hi Craynerd

I bought mine at Beaver Plant in Stamford Bridge, near York. Check out http://www.aaoil.co.uk for your nearest stockist but phone before travelling (yes bitter experience !).

John-Som

raynerd:
Hi John, thanks for the advice but I rang around and managed to get some yesterday. I have a few local stockists and I could only get 5L which is far too much but I have it now.


Jeff, your info on Raoults Law is really interesting. So fromwiki: "as the number of components in a solution increases, the individual vapor pressures decrease". So that is why heavier hydrocarbons that normally wouldn`t vapourise on their own, will when when mixed with other fuel components they will. Wiki again "If a pure solute which has zero vapor pressure (it will not evaporate) is dissolved in a solvent, the vapor pressure of the final solution will be lower than that of the pure solvent". So WD40 could possibly evaporate when added with the other fuel components. Nice one - I didn`t know anything about that.

 

dbvandy:
I have two vapor carbs on my two engines and the wd-40 gets sucked right into the engine with very little remaining in the tanks. 

Doug

Bogstandard:
Thanks for that info Doug.

Problem solved before even becoming a problem.


John

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