The Israeli air force is re-engining its Elbit Systems Hermes 450 unmanned air vehicles with the R902 (W) engine, with the enhancement to increase the type's operational envelope.Elbit says the new "Wankel"-design engine allows the Hermes 450 to deliver an improved endurance of more than 20h.
Other sources say the more powerful engine is also quieter, expanding the range of missions that the tactical UAV can perform.
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