Flammability limits of hydrated and anhydrous ethanol at reduced pressures in aeronautical applications.

•Flammability limits for ethanol at reduced pressures were determined.•295 experiments were carried out in total for anhydrous and hydrated ethanol.•The first 80 were to calibrate the heating chamber and compare the results.•215 experiments were performed both at atmospheric and reduced pressure.•Results had a correlation with the LFL obtained but UFL had some differences.