Automakers design your vehicle's intake tube to be the quietest possible unit that can fit in your engine compartment.

The engines used by Ark Angel are electric motors driving counter-rotating propellers, mounted in pods below the hull.

Already in place is an upgrade effort to fit new engines and digital cockpits to the existing fleet of 38 Chinook Mk2/2a support helicopters under a 408 million pound (＄653 million) program.