To sign the word "aerofoil," use the American Sign Language (ASL) sign for "A" by making a fist with your dominant hand and lifting your thumb, then trace a curved…
To sign the word aeroducts, use the American Sign Language (ASL) fingerspelling alphabet to spell out each letter - A-E-R-O-D-U-C-T-S - using the appropriate handshapes and finger positions.