Contra-rotating propellers

September 16, 2013 - 10:40am

Snecma plans soon to start another phase of open-rotor engine testing using a one-fifth scale model, in a research and technology effort that epitomizes how laborious developing a new commercial engine concept can be. The concept, based on contra-rotating high-speed propellers, may not find itself in service before 2025. Nevertheless, trials aimed at cutting noise while retaining the huge efficiency advantage of the open rotor’s architecture are well under way.

June 19, 2013 - 1:20pm
Antonov An-70 military transporter

The new short takeoff and landing Antonov An-70 military transporter will soon complete joint state testing, according to Dmytro Kiva, Antonov president and general designer and academician of the National Academy of Sciences of Ukraine. The An-70’s noise certification has been issued, he added.

November 8, 2007 - 2:26am

The debate about the design of future commercial aircraft engines broadened this year as concerns mounted over the effect aircraft engines may be having on global warming, while the cost of aviation fuel rocketed and noise became ever more of an issue.

 
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