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Mensaje: <blockquote data-quote="BIGUA82" data-source="post: 2568079" data-attributes="member: 14958">Oryx By KEITH CAMPBELL & MARTIN ZHUWAKINYU | 8th June 2012 | Engeneering News The SAAF operated two main helicopter types – the Aerospatiale (formerly Sud Aviation, now Eurocopter) Alouette III and the Aerospatiale Puma. The Alouette III could not possibly form the basis of a credible attack helicopter – it was not just that it was small, but its powerplant and dynamics system were 1960s technology, clearly outdated, and lacking in power. (An Alouette III powerplant and dynamics system were used as the basis for an engineering and development capability demonstrator for Atlas – now Denel – as a precursor to the Rooivalk programme; designated the Alpha XH-1, it first flew in 1984 and is today preserved at the SAAF Museum at Air Force Base Swartkops, Pretoria.)Athough the Puma was larger and more powerful than the Alouette III, it had already been displaced on the French production line by its bigger and more powerful offspring, the Super Puma, which first flew in late 1978. This led to South Africa’s developing and successfully executing a project to produce a new helicopter that was a hybrid of the Puma and the Super Puma – the Denel Oryx. The Oryx has a fuselage that is longer than that of the Puma but shorter than that of the Super Puma, and was fitted with the powerplants, dynamics systems, and tail boom of the Super Puma (later, military versions of the Super Puma were redesignated Cougar).The result was and is a helicopter with a greater payload and range capability than the Puma and a greater power-to-weight ratio than the Super Puma/Cougar. In consequence, the Oryx (pictured below) is an ideal transport helicopter for the hot temperatures and high altitudes frequently found in Southern Africa.<img src="http://cdn-www.airliners.net/aviation-photos/photos/1/8/2/2164281.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />The Oryx was developed in parallel with the Rooivalk prototypes. Being simpler and cheaper than the Rooivalk, the Oryx programme was completed much more rapidly, the helicopter being unveiled in 1991, and has been the SAAF’s transport helicopter ever since. Thus it was proposed that the Super Puma powerplants and dynamics systems, being made in South Africa for the Oryx programme, be used as the basis for the planned attack helicopter.At least one engineer is known to have proposed that the attack helicopter be based on the engines and dynamics system of the Aerospatiale Dauphin, an intermediate- (light/medium) size helicopter with good manoeuvreability and power, which would have resulted in a smaller, more rapidly developed, and more economical (to develop, buy and operate) system. As the French were allowing South Africa to use the powerplants and dynamics of the Super Puma, they would surely have agreed to the South Africans using the same elements from the Dauphin. However, the SAAF felt that using the same engines and dynamics as the Oryx would simplify logistics and reduce maintenance costs, so the decision was made to use the Super Puma systems as the basis for the Rooivalk.</blockquote>

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