In August, defense contractor Sierra Nevada Corporation (SNC) began conducting the first test flights with the successor to the flying US command center E4-B in nuclear conflicts. The company ...

The FAA issued an airworthiness directive (AD) for certain Austro Engine E4 and E4P models, found in Diamond DA42 NG and DA62 twin aircraft. The directive addresses "considerable wear of the timing ...

Diamond Aircraft's Austro E4 turbodiesel engine received European type certification after four years of development and a $64 million investment. The engine's development was accelerated due to the ...

Nicknamed 'The Flying Pentagon' one US plane worth £150m can survive a nuclear blast and stay in the air for days. The US Air Force in Washington has maintained a fleet of Nightwatch ...