Sukhoi displayed a sub-scale model of its S-70 Okhotnik “Hunter” unmanned air vehicle (UAV) with a flattened exhaust outlet at the MAKS international air show on 27 August.

The nozzle, which conforms to the flying wing’s shape, shows that the Russian military aircraft manufacturer intends to make its UAV stealthier than the initial prototype that it began flying on 7 August. That aircraft’s engine exhaust tip was exposed, a design which could raise the aircraft’s radar cross section and infrared signature.

However, the aircraft model looks similar to Western flying wing UAVs such as the Dassault Neuron, BAE Systems Taranis and Northrop Grumman X-47B. The flying wing shape should give it less radar cross section.

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Sukhoi S-70 model with flattened exhaust

Garrett Reim

The S-70 UAV also uses “special materials and coatings that make it practically invisible to radar detection equipment,” the Russian foreign ministry has said.

Russia has at times shown a tentative commitment to developing its own stealth technology or implementing low-radar-cross-section principles in its designs. For instance, the country’s stealth fighter, the Sukhoi Su-57, has an angled front fuselage and internal weapons bay but exposed jet turbine exhaust tips, giving it a low radar cross sections mostly from the front.

Indeed, Russia’s development of the Almaz-Antey S-400 Triumph anti-stealth aircraft missile system suggests skepticism by the country about stealth technology’s ability to fool advanced systems.

The timeline for adding an exhaust covering on the S-70 is not known as Sukhoi could not be reach for comment.

UAV DACH: Beitrag im Original auf http://www.flightglobal.com/news/articles/maks-sukhoi-shows-intent-to-add-stealthy-exhaust-on-460500/, mit freundlicher Genehmigung von Flight Global automatisch importiert, Der Beitrag gibt nicht unbedingt die Meinung oder Position des UAV DACH e.V. wieder. Das Original ist in englischer Sprache. Der Beitrag gibt nicht die Meinung von UAV DACH e.V. wieder. Der Beitrag gibt nicht die Meinung von UAV DACH e.V. wieder.