1.1 ,This test method covers the estimation of the net heat of combustion (megajoules per kilogram or [Btu per pound]) of aviation gasolines and aircraft turbine and jet engine fuels in the range from 40.19 ,MJ/kg to 44.73 ,MJ/kg or [17 ,280 ,Btu/lb to 19 ,230 ,Btu/lb]. The precision for estimation of the net heat of combustion outside this range has not been determined for this test method.