The whole thing about alcohol-based fuels not having enough specific energy capacity to power an aircraft is also dubious, to say the least. Even by the early 90s a piston-engine aeroplane had flown the Atlantic on alcohol fuel, and the rule of thumb for jets (including turboprops) is if it's runny and it burns, you can power a jet engine with it.
The problem, so far, with alcohol-based fuels is their low boiling points- unless you fit pressurised fuel systems, which will add a lot of weight and complexity, at high altitudes your fuel will boil away. Lower temperatures will not help, as the ethanol/methanol will boil much more readily with decrease of air pressure.
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I laugh in the face of danger. Then I hide until it goes away.
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