Helicopter
reed = a tall, slender-leaved plant of the grass family, which grows in water or on marshy ground
linen = cloth woven from flax
stunt = a trick
wow onlookers = make spectator stunned
swash plate assembly = a mechanism which allows the helicopter to do everything it needs to do to move in all directions
hover = remain in one place in the air
❗️Pay Attention To Pronunciation
autogyro [ɔːtəˈʤaɪ(ə)rəʊ]
See also
The Magic Of Flight By Philip Whiteman | Part 2 (https://t.me/espedition/821)