Professor Goddard does not know the relation between action and reaction and the need to have something better than a vacuum against which to react. He seems to lack the basic knowledge ladled out daily in high schools. It can't be done. It's just a fact of life. You just have to accept inconsistent muscle development as an unalterable condition of weight training.
Airplanes are interesting toys but of no military value.
Ferdinand Foch, Professor of Strategy, Ecole Superieure de Guerre. Everything that can be invented has been invented. Fisher, Professor of Economics, Yale University, 1929.