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Could we add compressed air, or an ~ 78% N2 / 21% O2 mix, to the Propellants and Efficiencies table? Although a mixture, this is by far the most accessible compressed gas to the general population[1] and would be an excellent point of reference for those who are not quite as scientifically literate.
PZ (talk) 18:55, 2 October 2019 (UTC)
- ^ Who doesn't know someone who owns an air compressor?