The first vowel in <aero> is always eə. In the first list below the first syllable bears the main stress of the word and the pronunciation is usually ˈeərə.
aerodrome aerofoil aerogramme aeroplane aeronaut aerosol aerospace
Alternative sound
In the second list the first syllable bears secondary stress.
aerobatic aerodynamic aeronautic(al) aerostatic
Alternative sound
Notice the two words aerobic = eəˈrəʊbɪk and aerography = eəˈrɒɡrəfi.
Alternative sound
2014_01_04
Updated 2015_04_03