Þyrla

Þyrla is lyftcræftes cynd mid spinnendum feðrum. Ƿiþ fæstȝefeðrod lyftcræftas, þus þyrlas magon rihtuppƿearde flēogan, on lyfte standan, and flēogan forþ, bæcƿearde, and hande bȳ hande.

Þyrla
Aerospatiale SA360
Endebyrdnesse dǣl ymbe Lyftcræfta Floccas Supported bȳ Lēohtra-þonne-Lyft Lyftingas (aerostats) Ungemihtod Gemihtod • Ballōn • Lyftscip Supported bȳ LþL Lyftingas + Aerodynamic Lift Ungemihtod Gemihtod • Cyndblendisc lyftscip Supported by Aerodynamic Lift (aerodynes) Ungemihtod Gemihtod Ungemihtod fæstgefeðrod Gemihtod fæstgefeðrod • Glider • hang gliders • Glīdflēoge • Kite • Gemihtod lyftwægn • powered hang gliders • Gemihtod glīdflēoge • Flettner airplane • Ground-effect vehicle Powered hybrid fixed/rotary wing • Tiltwing • Tiltrotor • Mono Tiltrotor • Mono-tilt-rotor rotary-ring • Coleopter Ungemihtod rotary-wing Gemihtod rotary-wing • Rotor kite • Autogyro • Gyrodyne ("Heliplane") • Þyrla Powered aircraft driven by flapping • Ornithopter Ōðer Gescēad Hebboðes Ungemihtod Gemihtod • Hovercraft • Flying Bedstead • Avrocar

Þyrla (1922)

Mǣste sprǣċe þǣre ƿorulde brūcaþ þæt ƿord helicopter, beinnende Nīƿenglisc, fram Frenċisce hélicoptère þe Gustave de Ponton d'Amecourt ǣrest ƿrāt in 1861, mid fruman fram Grēkisce helix/helik- (ἕλικ-) = þurhstandende hring oþþe ċierrende, and pteron (πτερόν) = feðer.

Man ƿorhte þyrlas on flyhtes fyrmestum healfȝēarhundrede, mid þǣm Focke-Wulf Fw 61 bēonde se fyrst fremmende þyrla, in 1936. Menn ƿorhton sum þyrlas, ac ne ƿæs hit þe oþ 1942 þæt þyrla þe Igor Sikorsky ƿorhte cōm to fulƿeorcscipe bȳ 131 lyftcraftas ƿorht.

Þēah mǣst ǣror þyrlas hæfdon mā þonne ān hēafodspinnere, hit ƿæs se ānliċ hēafodspinnere mid ƿiþspinmihteliċum tæȝlspinnere þe man reċþ ƿoruldƿīde to bēonne se þyrla.