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| Bégé |
Vacuum engine Fuel, choose the best for your engine |
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| Mister Occlusion |
Good comparative study. I've never read of anyone else commenting about fuels for these engines, and I can certainly see that you'd want something that is going to leave as little fouling as possible.
I'd probably use straight methanol for the (potentially) cleanest burn. |
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| Graham-Jilly |
yes great comparison Bégé thanks for posting | ||
| Bégé |
My vacuum engines, run much better with the 95 % alcohol (Ethanol) | ||
| Bégé |
The engine is much more "precise" 
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| Reid |
What kind of alcohol is in the cheaper product? Is it the same alcohol but with more water? Or is it isopropyl alcohol? A clearer test could not be demonstrated. Thanks again  for your work to help us all.
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| Reid |
I bow and say "well done sir, superb!" |
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| Bégé |
I do not know the "isopropyl",
alcohol 95 % is made with some ethanol or ethylic alcohol, the ethanol is some 100 % pure alcohol see here 
http://en.wikipedia.org/wiki/Ethanol 
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| Reid |
OK, so the difference is in the water content.
The poorer fuel contains more water. Yellow flame results due to the latent heat of water absorbing needed vaporization heat from the alcohol-- and alcohol is already difficult enough to vapourize! In Miami the Cubans would say "muy claro" And I will say again, gracias! |