Þyrla

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)

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.

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.^[1]^[2]

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^[3] bȳ 131 lyftcraftas ƿorht.^[4]

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.

Fruman

↑ "helicopter". Online Etymology Dictionary. Beȝieten: 28 Blōdmōnaþ 2007
↑ Cottez 1980, p. 181.
↑ Munson 1968
↑ Hirschberg, Michael J. and David K. Dailey, "Sikorsky." US and Russian Helicopter Development In the 20th Century Archived 2007-12-18 at the Wayback Machine. American Helicopter Society, International. 7 July 2000.

[1] "helicopter". Online Etymology Dictionary. Beȝieten: 28 Blōdmōnaþ 2007

[2] Cottez 1980, p. 181.

[Munson-3] Munson 1968

[Hirschberg-4] Hirschberg, Michael J. and David K. Dailey, "Sikorsky." US and Russian Helicopter Development In the 20th Century Archived 2007-12-18 at the Wayback Machine. American Helicopter Society, International. 7 July 2000.

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