whup-whup-whup

sound of a helicopter. Also: ‘whumpa-whumpa-whumpa-whumpa’ ‘whop whop whop
wuppa wuppa
whup-whup-whup
flac-flac-flac
chakk-chackk-chak-chak, chak-a-chak-akk-chk-chk-chk
DUBDUBDUBDUBDUBDUBDUB
THITH-THITH-THITH
batabatabatabata
ÔtocotocotocotocoÕ