avia.wikisort.org - Glider

The Eta is a German-Italian Open Class two-seater flapped self-launching glider manufactured by ETA Aircraft. On introduction it was the highest performing glider.^{[clarification needed]}[1]

Eta
Eta at Lübeck airport
Role	Open-class sailplane Type of aircraft
National origin	Germany
Manufacturer	Consortium
Designer	Flugtechnik Leichtbau, Braunschweig, led by Reiner Kickert
First flight	31 July 2000
Number built	3

Early flights

The Eta made its first flight on July 31, 2000 in Cochstedt, Germany, reaching a height of 2 m (7 ft). The second flight was the first aerotow launch, reaching 1,500 m (4,920 ft). The third flight was self powered and had no problems. The official presentation was on 1 August.^{[citation needed]}

Production

Three Etas have been manufactured. The second prototype was extensively damaged in 2003 during the spin tests required for the type certification but both pilots parachuted to safety. The prototype was repaired and the tests completed successfully. The glider was to be produced by hand at a rate of about three per year.

Development

The Eta is an example of a trend in glider development in which private pilots initiate the development of new open class gliders. The private development of the Concordia sailplane promises a further elevation of lift-to-drag ratio of several points.^{[citation needed]}

Operational history

An Eta participated in a World Championship for the first time in 2003 at Leszno. Its pilot, Janusz Centka, achieved an overall second place. Good placings have also been achieved by the Eta in later competitions. The glider is however hampered by the Open Class weight limitation which limits its wing loading in gusty weather to the advantage of its opponents.^{[citation needed]}

Specifications

Data from Simons (2005) p.99[2]

General characteristics

• Crew: Two
• Length: 9.75 m (32 ft 0 in)
• Wingspan: 30.90 m (101 ft 5 in)
• Wing area: 18.61 m² (200.3 sq ft)
• Aspect ratio: 51.33
• Airfoil: HQR 2 inboard, HQR 1 outboard
• Empty weight: 710 kg (1,565 lb)
• Gross weight: 850 kg (1,874 lb)
• Maximum wing loading: 44.8 kg/m² (9.18 lb/sqft)
• Powerplant: 1 × Sola 2625-02 twin cylinder inline two stroke piston engine^{[citation needed]}, 47 kW (63 hp) approximately
• Propellers: 2-bladed carbon reinforced plastic propeller, pulley driven on folding column

Performance

• Maximum glide ratio: 70 at 108 km/h[3]^{[citation needed]}
• Rate of sink: 0.4[3] m/s (79 ft/min)

See also

• Binder EB29

References

External links

• Official site of the Eta Glider project.

На других языках

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[de] Eta (Flugzeug)

Die Eta (Eigenschreibweise: eta) ist ein eigenstartfähiges doppelsitziges Segelflugzeug mit 30,90 m Spannweite der Offenen Klasse. Das weltweit größte und leistungsfähigste Sportsegelflugzeug hat eine beste Gleitzahl von etwa 70.

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- [en] Eta (glider)

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[fr] ETA (planeur)

Le planeur ETA est un planeur autonome biplace dont l'envergure est de 30,90 m de la classe de compétition dite "Libre". Il s'agit, en 2008, du plus grand et du plus efficace des planeurs de compétition affichant une finesse de 72 (pour 1 000 mètres de hauteur perdus, 72 km parcourus).

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[it] Flugtechnik & Leichtbau eta

Il Flugtechnik & Leichtbau Eta è un aliante da competizione prodotto dall'azienda tedesca Flugtechnik & Leichtbau dall'anno 2000.

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