They want highway concessionaire Projek Lintasan Kota Holdings Sdn Bhd (Prolintas) to build sound barriers to reduce the noise. “Motorists usually accelerate when going up the ramp and it is noi ...
A civilian jet broke the sound barrier three times during a test flight ... will be analyzed by the company as it moves to its ultimate goal of building Overture, its supersonic passenger jet.
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