Antonov An-8

An-8 sur Wikipedia.en

[Vous devez être inscrit et connecté pour voir ce lien]

------------------------------------------------------------------------------------------------------------------------------------------------------------------

The [Vous devez être inscrit et connecté pour voir ce lien] An-8 ([Vous devez être inscrit et connecté pour voir ce lien]: Camp) is a Soviet-designed twin-[Vous devez être inscrit et connecté pour voir ce lien]-engine high-wing light [Vous devez être inscrit et connecté pour voir ce lien].

[Vous devez être inscrit et connecté pour voir ce lien]

Development

In December 1951 [Vous devez être inscrit et connecté pour voir ce lien] initiated the design of a twin-engined assault transport aircraft, designated DT-5/8 (Desahntno-Trahnsportnyy [samolyot] - assault transport aircraft), to be powered by two [Vous devez être inscrit et connecté pour voir ce lien] turboprop engines, and fitted with a large rear cargo door to allow vehicles to be driven straight into the hold.

On 11 December 1953 the Soviet Council of Ministers issued directive No.2922-1251 to the Antonov OKB, requiring them to build a twin-turboprop transport aircraft derived from the DT-5/8.

Bearing the in-house designation of Izdeliye P the resulting aircraft followed state of the art practice with a high wing carrying two propeller engines sat atop a rectangular section fuselage, tricycle undercarriage, with main gear units housed in pods either side of the fuselage, an upswept rear fuselage providing clearance of the tail unit for loading and unloading.

After State acceptance trials production was not recommended due to poor spinning characteristics, directional
stability and control issues, nosewheel shimmy, poor controllability when landing in crosswinds above 6 m/s (12 kt) and, last but not least, [Vous devez être inscrit et connecté pour voir ce lien] oscillations in all-three axes which were difficult to control and made piloting the prototype very tiring.

As well as the aero-dynamic faults the TV-2 engines proved difficult to start with unstable gas dynamics at altitudes above 6,000 m (19,700 ft).

with unstable gas dynamics at altitudes above 6,000 m (19,700 ft).^{[Vous devez être inscrit et connecté pour voir ce lien]}

The Antonov OKB set about rectifying the faults with increased area vertical and horizontal tail surfaces, anti spin strakes on the upper rear fuselage sides, deleting the wing LE slats, local structural reinforcements and replacing the TV-2 engines with Ivchenko AI-20D turboprop engines, which had the added benefit of reducing the empty weight by 3 tonnes (6,600 lb).

The new design required the use of new production techniques, like: stamping and forging of large high strength parts, extrusion of long sections, chemical milling of large skin panels and other new techniques.

Given the service designation An-8, the new transport was built in the GAZ-34 factory in [Vous devez être inscrit et connecté pour voir ce lien], from 1957 to 1961, as a larger-capacity replacement for the earlier [Vous devez être inscrit et connecté pour voir ce lien] (DC-3), with a large unpressurized hold, a manned tail gun position, chin radome for navigation/mapping radar and a glazed nose for the navigator.